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#504730 - 05/31/15 03:59 AM Monthly Weather Summary  
Joined: Oct 1999
Posts: 52,953
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Monthly Weather Summary, September 2014

National Meteorological Service of Belize

The tropical waves came in September 2014 and brought much needed rains to Belize. The first day was cloudy across the country. A tropical wave crossed the country the previous day and its associated moisture and instability produced light rain and thundershowers through to the first day of September. The second of September saw only isolated showers as the tropical wave moved farther west, away from the country.

Between the third and sixth of the month, a tropical wave approached and crossed the country. This was supported by upper-level instability. The entire country experienced showers and thunderstorms.

On the seventh, another tropical wave crossed the country. The accompanying showers and thunderstorms affected mostly northern parts of Belize. Lingering moisture and instability produced a few showers on the eight.

Moisture and instability increased again on the ninth as yet another tropical wave crossed Belize. Much showers and thunderstorms accompanied its passage. This wave was also accompanied by a great amount of moisture and in its wake the following three days saw much showers and periods of rain across the country. On the twelfth and thirteenth, mainly the south of the country experienced some showers and thunderstorms.

The fourteenth saw the passage of another wave. This produced showers and thunderstorms across the country. On the fifteenth and sixteenth, shower activity gradually died down. Between the seventeenth and nineteenth, no special features affected the country. Only isolated showers were observed.

An upper-level trough moved over Belize on the twentieth and sat there for the next three days. This supported showers and thunderstorms around the country, but especially over inland areas. On the twenty-third, a tropical wave added more showers to the already wet conditions.

As the trough and wave moved away from the area, a ridge moved in on the twenty-fourth. This maintained showery weather through to the twenty-fifth. Showery weather was further prolonged on the twenty-sixth as another tropical wave crossed the country.

Showers began to decrease on the twenty-seventh and continued so on the twenty-eight. During this time showers affected mainly the south at night and early morning. This trend continued through to the twenty-ninth. On the last day, a few showers and isolated thunderstorms were observed around the country.

In conclusion, six active tropical waves brought much needed rainfall to the country. These were enhanced by upper-level instability produced by a trough and a ridge. Data collected from around the country shows rainfall amounts were above the average for September at majority of the stations.


Monthly Weather Summary for November 2014

Our weather started out cloudy and cool for the first weekend in November. A cold front extended from eastern Cuba across western Cuba to northern Belize There was also a stationary front ahead which extended from Jamaica to Cape Gracias a Dios.A high  pressure ridge(1032hPa)  extended south across the central Gulf of Mexico to Belize and Central America. The cold front eventually merged with the stationary front during Sunday afternoon (2nd).

Variably cloudy and cool weather started the first full week in November as the influence of the high pressure ridge persisted. The surface flow over Belize was northerly to northeasterly. A stationary front extended from Haiti to the coast of Nicaragua during Monday (3rd).Belize sounding for that morning was dry. An inversion layer was detected near 750hPa.The weather turned out cool and dry. The cool northeasterly surface flow prevailed on Tuesday as rain and showers remained mostly offshore. Skies remained cloudy into the late evening as showers and light rain occurred. The high pressure ridge over the eastern Gulf of Mexico and the Yucatan Peninsulas produced an east to northeasterly surface flow over Belize and the western Caribbean. Our weather continued to be cool and mostly dry. Another cold front appeared on weather charts along the Texas Gulf Coast early Wednesday morning (5th). Cloudy skies (layered clouds) with embedded weak convection increased over northern parts of the country late Wednesday evening. A 1023hPa  surface high over northern Florida/Georgia produced a northerly to northeasterly  surface  flow on Thursday(6th).The cold front was now over the northern Gulf of Mexico. During Thursday a few showers and periods of light rain along coastal areas moved inland after mid-morning. A high pressure ridge was noted over the western Gulf of Mexico on Friday(7th).The  front was stationary from central Florida to the northwest Gulf of Mexico then south to the western Bay of Campeche. Sunny and dry weather prevailed across the country on Saturday (8th).On Sunday a cold front extended across the eastern Bay of Campeche and the northwest Yucatan Peninsula to a low pressure center over the Florida Straits. Another front was noted along the Texas coast.The surface flow over Belize was northwesterly. During the afternoon skies turned cloudy with satellite imagery showing bands of layered clouds coursing southeast across the mainland. A few brief showers occurred at the International Airport during the afternoon and evening as the cold front crossed Belize.

Weather conditions at the start of the second week in November turned out mostly sunny, dry and cool. A high pressure ridge across the Gulf of Mexico supported a dry east to northeasterly surface flow. During Wednesday (12th) skies were cloudy at times and satellite imagery suggested light showers over northern, central and offshore Belize. The tail portion of the front weakened to a surface trough from central Cuba to near northern Honduras. Thursday’s weather (13th) turned out sunny as well. A cold front extended from Florida across the central Gulf of Mexico to near Tabasco, Mexico. A slack pressure gradient over the northwest Caribbean ensured light surface winds. During Saturday (14th) skies turned cloud across much of the country. The cloudiness started in the south first as a lingering surface trough (remnants of previous front) festered. For the rest of Saturday skies remained cloudy and showers occurred at several northern stations and the International Airport as well. Sunday's weather (16th) continued cloudy for central and northern Belize as a few showers and periods of light rain occurred. Weather conditions improved during the afternoon. Weather charts located a stationary front along the Texas Gulf coast and a stronger cold front further north over North-central Texas. The surface flow over Belize was easterly.

At the start of Monday (17th), the strong cold front over the northwest Gulf of Mexico extended from Louisiana to the northeast coast of Mexico. A dry and light southeasterly surface flow provided Belize with sunny and dry weather. A surface trough ahead of the front extended from 28°N83°W to 24°N89°W with scattered to numerous showers and thunderstorms east of the trough axis. An upper level ridge was anchored over the western Caribbean. Skies turned cloudy early Tuesday (18th) morning as showers and thunderstorms developed over northern and coastal areas. The International Airport recorded 83.5mm of rain for 9:00am.A rainfall station in the Orange Walk district measured 107.2mm for that morning. Though the showers decreased later, skies remained cloudy throughout the day. At 3:00pm the cold front extended through the Florida Straits and western Cuba to the Yucatan Peninsula to beyond 20°N88°W.The surface trough extended from 21°N84°W to the coast of Honduras near 16°N85°W.Strong ridging occurred over the western Gulf of Mexico behind the front. The cold front crossed northern Belize early Wednesday (19th) morning. Cool and cloudy weather with rainy weather for coastal areas characterized out weather during the morning. As the day wore on the rain clouds neared other areas of the coast to produce several periods of rain with isolated thunderstorms. The rainy weather persisted into to evening. The weather situation wasn't much different for at the start of Thursday (20th).The cloudy and rainy weather persisted. The stationary front extended from west central Cuba to the north coast of Honduras. The surface flow remained north to nottheasterly.Periodic outbreaks of rain showers occurred during the day. On Friday morning(21st) skies started out cloudy  and the morning sounding for Belize appeared moist(precipitable water=59.97mm).the tail end of the stationary front evolved into surface  trough across the Yucatan Straits to the coast of Belize. Though the surface flow continued light northeasterly, the cloudy sky conditions relented considerably. The weekend weather turned out quite sunny as an east to southeasterly airflow generated by an Atlantic surface high dominated.

Weather charts for the final Monday (24th) in the month showed a cold front on the Gulf coast of Texas, USA.For Belize our weather continues mostly sunny as the Atlantic surface high maintained the dry southeasterly airflow. Later on Monday, the cold front emerged over the northwest Gulf of Mexico. A pre frontal trough ahead of the front was over the north central Gulf of Mexico. The cold front headed southeast across the central Gulf of Mexico on Tuesday. Late Tuesday evening the front extended from central Florida across a 1011hPa surface low over the northeast Gulf of Mexico to the Bay of Campeche. Satellite imagery revealed the steady development of line convection over the Yucatan Peninsula and western and northern Belize during the evening. These showers and thunderstorms resulted from the pre frontal trough aligned ahead over the northeast Yucatan Peninsula. The showers and thunderstorms headed east and southeast for coastal parts of the country through Wednesday morning (26th).Cloudy; cool and windy weather prevailed during the day. The cold front extended from southern Florida across the southeast Gulf of Mexico near 26°N82°W to western Cuba then to the coast of Belize near 16°N89°W.Ridging from a continental surface high(1029Pa) centred  over northern Mexico supported a j gusty northerly t o northwesterly surface flow over Belize and coastal waters. San Pedro, Ambergris Cay recorded wind gusts to 32kts, while Cay Caulker recorded gusts to 27kts.Thursday's weather continued with relatively unchanged weather conditions (cloudy, windy and cool.) Periods of light to moderate rain occurred at sea and coastal areas as well as in the south. The front was now stationary form central Honduras across the western Caribbean to eastern Cuba before transitioning to a cold front over the Atlantic Ocean. Another cold front was over the central Gulf of Mexico early Friday morning(28th).The front extended from southern Florida then curved just north of the Yucatan Peninsula to the Texas Gulf coast near 27°N97°W.A surface high over the southeast United States continued produce ridging across the Gulf of Mexico and Belize. Our weather remained cloudy and windy with periods of light rain mainly over the sea, along the coast and in the south. The Tropical Prediction Center (TPC) pushed the second front across northern Belize Friday afternoon. This front extended from eastern Cuba across Belize to Guatemala and the Yucatan Peninsula. The stationary front was ahead and stretched from eastern Cuba, across Jamaica to offshore eastern Nicaragua. The second cold front merged with the stationary front early Saturday morning (29th).Though skies continued generally cloudy for southern Belize, elsewhere skies turned out quite sunny. Showers and the windy conditions from previous days subsided considerably. The continental surface high (1028hPa) centred near North Carolina maintained a cool north to northeasterly  surface flow. The northeasterly flow produced cloudy skies Sunday morning (30th).Coastal showers started over coastal waters at the cayes   close to midday, then spread too much of the coast during the afternoon and evening. The International Airport measured 113.5mm of rainfall. The rainfall was also excessive in Belize City, where localized flooding occurred at many locations.

Click on the link below for the Rainfall Summary for November,2014:

 Total Rainfall for November,2014

Click on the link below for the Minimum Temperature Summary for November,2014:

Minimum Temperature for November,2014

Click on the link below for the Maximum Temperature Summary for November,2014:

Maximum Temperature for November,2014

Click on the links below for the dekadal Rainfall Summary for November,2014:

dekad31

dekad32

dekad33


On Ambergris Caye we've had strong squalls and a down-pouring of substantial amounts of rain.


#504731 - 05/31/15 04:00 AM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
Posts: 52,953
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Monthly Weather Summary, December 2014

National Meteorological Service of Belize

Climatology shows that the main features influencing weather across the country of Belize in December are cold fronts, upper level troughs and the development of moist northeasterly airflows in the area. There were two frontal passages in December of 2014. Additionally, a few fronts stalled just north of the country resulting in persistent moist conditions over the area. The upper levels were mostly dry during the month.

The first day of December 2014 started out cloudy with showers and rain affecting most areas of the country as a moist northeasterly airflow dominated. The following day the flow became more northerly and slightly drier as a continental ridge west of the area dominated. The ridge continued to support a cool northerly to north-northeasterly airflow for the following four days. This supported generally cloudy skies across the country but showers were confined mostly to the south.

A cold front entered the northwest Gulf of Mexico later on the 6th and slowly began to make its way southeastward. The ridge associated with this front started to influence the flow over Belize on the 7th. The result was mostly sunny and dry conditions on that day. However by the 8th the cold front had advanced far enough south to produce a moist and convergent North to Northwesterly flow over Belize. This produced cloudy conditions with showers affecting mainly the south and offshore areas. Similar conditions occurred on the 9th. The slow moving cold front then crossed the country on the night of the 9th. It did not move very far out of the area causing weather over Belize to remain cloudy and wet for the following 5 days until the 14th. Additionally, strong high pressure ridge from the west combined with relatively low pressures over the Gulf of Honduras produced a gusty north to northeasterly airflow over the area during that time. This resulted in rough sea conditions and the cancellations of several cruise ships during that week.

Moisture decreased considerably on the 15th and this pattern continued through to the 18th. The result was mainly fair and dry weather across the country.

Weather would change again on the 19th when a trof of low pressure begun approaching the country from the east. This slow moving trof produced cloudy skies with light showers and periods of rain on the 19th and 20th.

By the 21st the trof axis was west of the area and this factor coupled with frontal lows developing in the northwest Gulf of Mexico, contributed to a relatively dry east to southeasterly airflow over Belize from the 21st through to the 24th. During that time a cold front was slowly making its way toward Belize. This was the second cold front to cross the country which happened early on Christmas day (before daybreak). Moisture increase associated with this front was not enough to produce significant rainfall over Belize. Moreover, upper level conditions were not supportive of deep convective activity. The result was mostly cloudy and cool conditions on Christmas day with showers and light rain confined mostly to the south and offshore areas.

Weather conditions cleared late on the 26th but became cloudy once more on the 27th. Clouds and rain decreased once more on the 28th, and the 29th was partly cloudy with only isolated showers.

On the last two days of the month, a cold front became stationary from Florida to the Bay of Campeche. This system along with broad trofing which developed over the Western Caribbean helped to support a relatively moist East to Northeasterly airflow over Belize on the 30th and the 31st. This caused skies to be cloudy at times with occasional showers affecting the country.

Overall rainfall for December 2014 was normal for most stations in the south and central areas of the country while stations in the north recorded above normal rainfall.


#504732 - 05/31/15 04:01 AM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
Posts: 52,953
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Monthly Weather Summary, January 2015

National Meteorological Service of Belize

January 2015 began with relatively moist conditions across Belize. Ridging from a continental high pressure system over the South-Central, United States of America and a stationary front in the Gulf of Mexico, supported a moist east to north-easterly flow. For the first two days, this moist flow supported a few showers across the country. A gusty south-easterly set in on the third day, but moisture persisted and maintained a few showers around the country. The gusty south-easterly flow persisted on the fourth day and dried up the moisture.

However, on the fifth, another stationary front in the Bay of Campeche induced a backing of the winds and a moist north-easterly flow set in once again. This supported a few showers around the country. As the north-easterly flow persisted on the sixth and seventh day, showers became confined to the south of the country.

On the eighth day, a cold front reached as far south as Northern Belize. It supported an increase in showers across the country. This front quickly dissipated late on the same day. However, the associated shear line remained over Northern Belize on the ninth. The following day, it moved to Southern Belize and then into the Gulf of Honduras. From the ninth to the twelfth, this system supported showery weather across the country. The associated high pressure ridge over the Northwest Caribbean maintained a moist north-easterly flow, which supported cloudy and rainy weather on the thirteenth and fourteenth.

From the fifteenth to the twenty-third, weather conditions improved. Moisture levels decreased and showers became generally isolated, at times none at all. This was after a cold front slipped into the Gulf of Mexico earlier on the twenty-first and induced an east to south-easterly flow. Late on the twenty-third, pre-frontal activity supported a few showers and isolated thunderstorms over some inland and northern areas.

On the twenty-fifth, a cold front quickly crossed the country, accompanied by a few light showers. On the twenty-sixth, the associated high pressure ridge supported a dry and cool northerly flow. However, the following day saw cool and rainy weather. On the twenty-seventh night, another cold front quickly crossed the country, which supported cool and dry conditions through to the twenty-eight. Moisture levels increased on the twenty-ninth and persisted through to the end of the month. This supported showers mainly over southern Belize.

January in Belize falls in the transition period between the 'wet season' and 'dry season'. Climatologically, it is the coldest month of the year. Data collected this January, however, shows that minimum temperatures were above normal. On the other hand, data shows that rainfall was above normal. Even though three cold fronts affected the country, it is evident that the associated high pressure ridge did not supported the normal cool temperatures. On the other hand, the persistent moist, north-easterly flow that dominated for most of the month, supported above normal rainfall.


#504733 - 05/31/15 04:05 AM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
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Monthly Weather Summary, March 2015

National Meteorological Service of Belize

March 2015 was not as dry as dry as normal, and only one dissipating cold front reached Belize and stalled. The first two days of the month saw a few showers over some areas during the mornings, as a ridge to the north along 29/30N supported a moderate to fresh east-northeasterly surface flow, along with a weakly convergent upper pattern and northwest upper winds. Showers became isolated on Tuesday 3rd as moisture decreased, and the next two days were mostly sunny and dry. The surface flow veered a bit to the east and east-southeast and was gusty on the 4th. The upper pattern continued weakly convergent.

The presence of a cold front over the eastern Bay of Campeche and the associated ridging over southern Mexico on Friday 6th caused a backing of the surface flow to the east-northeast and a slight increase in moisture. The front dissipated on the 7th and a few showers developed mainly over northern portions of the country from the 6th to the 8th. Early morning fog was reported over some central low lying areas on the 8th, as the gradient slackened over our area. On Monday 9th, a low level wind surge moving in from the east resulted in some showery weather over central areas of the country. A total of 21.5mm of rain fell at the PGIA and 22.9 in Belize City. A gusty east-southeasterly surface and low level flow prevailed on the next two days then dropped off a bit on Thursday 12th. Showers were isolated over those three days (10th-12th).

On Friday 13th, a few showers developed mainly over central and northern areas as moisture and low level convergence increased moderately when cold front stalled from near New Orleans to the central Yucatan Peninsula along 90W. An upper trof to the west along 100w and a ridge over the Caribbean Sea resulted in a weakly divergent upper pattern over our area. Savannah recorded 16.8mm of rainfall; while Belmopan recorded 47.3mm. The portion of the front over the Yucatan Peninsula dissipated the next day, however a few showers continued over some areas from the 14th through the 18th as the surface flow varied between east and east-northeast. The moisture was generally low, but fluctuated sufficiently along with low level convergence to support the showers. The upper pattern continued weakly divergent through the 16th, then became weakly convergent on the 17th and 18th.

Showers became generally isolated on Thursday 19th, however Punta Gorda received 14.7mm of rain. A single isolated thunderstorm developed over the Vaca Plateau during the afternoon of Friday 20th. Mainly fair and dry weather prevailed from the 21st to 26th, with slightly warmer temperatures from the 24th to the 26th. The surface airflow was relatively dry and mainly from the east-southeast during that seven day period, with a neutral to weakly divergent upper pattern.

Friday 27th was sunny in the morning, then some showers and thunderstorms affected most areas during the evening and night as a pre frontal trof crossed the country. Pomona measured the most rainfall with 33.2mm; while Belmopan had 24.5mm and Punta Gorda got 20.5. The next day was cloudy over the west and south with some showers over the west and south, and over the northern Cayes later. Savannah reported rainfall totalling 68.7mm. The associated cold front weakened and the diffuse tail end drifted south over northern Belize during the afternoon of Saturday 28th then to central Belize the next day Sunday 29th. Some showers occurred over some parts of the coast in the morning then over most areas in the afternoon and evening, especially the Belize City area. Rainfall of 20.4mm was measured at the PGIA; while Belize City recorded 69.8mm and the Belize Zoo 67.9mm. The portion of the front over and just east of Belize dissipated altogether on Monday 30th and the last two days of the month saw decreasing shower activity, with a few showers mainly over the south on Monday 30th and Tuesday 31st. Most stations recorded some rainfall, with amounts ranging from 5-15mm.


#504734 - 05/31/15 04:06 AM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
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Monthly Weather Summary, April 2015

National Meteorological Service of Belize

Climatologically, the Atlantic High Pressure ridge usually dominates the region during the month of April. Its orientation typically produces a dry southeasterly airflow across the country. At times heat-lows may develop across southern Mexico which causes pressure gradients to tighten over the area resulting in gusty winds. However, when the centres of these systems are over or very near the country, pressure gradients would instead slacken causing light winds and an excessively high heat-index. This overall synoptic pattern for the month normally corresponds with dry and warm weather. The only relief would come in the form of an occasional cold front. On average about two cold fronts would cross the country during the month. These may be accompanied by strong to severe thunderstorms and they are the main producers of the little rainfall for the month. April 2015 was characteristically warm and dry. Only one cold front crossed the country on the very last day of the month.

The first day of the month started out cloudy at times with a few showers as a relatively moist easterly airflow dominated. The airflow continued easterly the following day but moisture decreased and only isolated showers were observed. A similar situation occurred on the 3rd. The flow shifted to the east to northeast on the 4th through to the 7th but moisture remained low and conditions were mainly fair and dry. The flow veered once more to the east on the 8th through to the 11th but weather conditions continued generally fair with only isolated showers across the country.

The characteristically warm and dry weather started on the 12th when heat lows over Mexico coupled with the Atlantic High Pressure ridge to the northeast of area caused the dry and gusty east to southeasterly airflow to set in. This pattern actually lasted until late in the month around the 26th. This resulted in warm and mostly dry weather with little to no rainfall across the country, except for an occasional afternoon thunderstorm in the interior. Temperatures increased significantly around the 21st and peaked around the 28th of the Month. Maximum temperatures in excess of a 100°F occurred over some inland areas on several days during this period.

The late-season cold front began approaching the country around the 28th. On that day a prefrontal trof over the area caused afternoon thunderstorms to flare up inland and over the northern districts. Thunderstorms once again flared up on the 29th but this time they moved across the country by nighttime as the cold front was getting nearer. The cold front was over Belize on the 30th and it produced a generally cloudy day. However, by that time most of the thunderstorm and shower activity were confined mainly to the Sea.


#504879 - 06/04/15 04:54 AM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
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Monthly Weather Summary, May 2015

National Meteorological Service of Belize

May first, 2015 was a cloudy and cool day across Belize. Minimal rainfall activity was observed. A ridge in the Gulf of Mexico supported a cool and moist north-easterly air flow, while a stationary front was observed from Northern Honduras to Cuba. On the second and third day, the ridge continued to support the moist north-easterly flow. As a result a few showers affected coastal areas.

From the fourth to the thirteenth, after the ridge collapsed, a dry and gusty (at times) east-south-easterly air flow developed. A the same time, a convergent pattern developed aloft.

On the fourteenth and fifteenth, the upper- levels became divergent over the southern areas of the country. As a result, night time thunderstorms were observed over the extreme south, while minimal rainfall activity was observed elsewhere.

The weather remained fair and mostly dry on the sixteenth and seventeenth, then night time thunderstorms were once again observed over the extreme south on the eighteenth.

A convergent pattern developed and prevailed between the nineteenth and twenty-second. At the lower-levels, a dry pattern persisted and minimal rainfall activities were observed.

On the twenty-third, an upper -level trough moved over the area, supporting a divergent pattern. A few showers and thunderstorms affected most areas of the country.

The pattern aloft changed as early as the twenty-third night and became convergent. From such time to the thirtieth, fair and mostly dry weather prevailed across the country.

Another trough aloft on the thirty-first and increased moisture at the lower-levels supported a few showers and thunderstorms.

In conclusion, observation indicates that May 2015 was mostly dry across Belize. An east to south-easterly flow, gusty at times, prevailed for majority of the days. Two upper-level troughs and increased low-level moisture supported the bulk of the rainfall on the twenty-third and on the thirty-first.


Monthly Weather Summary, June 2015

National Meteorological Service of Belize

Moist and unstable conditions prevailed during the Monday 1st as a northeasterly surface - low level flow developed in advance of a tropical wave. At the upper levels a west-northwesterly flow prevailed with a trough over the Gulf of Mexico and a ridge from the Eastern Pacific across Central America supported a diffluent pattern aloft. A low developed along the wave over the Gulf of Honduras by Tuesday 2nd with the associated trough extending north to near western Cuba. Light winds and land breeze effects added to coastal convergence. Twenty-four hour rainfall amounts of two to five inches were recorded at some stations across the country during Monday 1st and one to two inches Tuesday the 2nd.

By Wednesday 3rd as the low tracked northeast towards northeast Yucatan, an upper level trough positioned over the southeastern Gulf of Mexico and maximum divergence shifted east of our area. Twenty-four hour rainfall amounts were significantly reduced. However during the Thursday 4th and Friday 5th a deep layer southerly flow resulted in showers and thunderstorms developing in the south over-night with light showers spreading north across the country through the early morning. As the 1013hPa low drifted to western Cuba and upper level trough positioned along eastern Yucatan and Belize, some rainfall continued to affect some areas during the Saturday 6th and Sunday 7th and increasing while affecting most aread during the Monday 8th with 24 hour rainfall in the order of 1-3 inches.

As another tropical wave approached, the resulting northeasterly airflow got upper level support from a west-southwesterly flow aloft. The tropical wave crossed Central America by Tuesday 9th and the axis of the upper level trough reposition east of Yucatan and Belize with a ridge across the Western Caribbean. Showers and thunderstorms over-night and into the early morning the Wednesday 10th were accompannied by strong and gusty winds up to 40 knots over northern and coastal areas. During the Thursday 11th and Friday 12th the surface trough / tropical wave near northern Belize and Yucatan deepened and then developed into a low by the Saturday 13th. A diffluent west-southwesterly flow prevailed aloft and showers and thunderstorms developed inland and spread east towards the coast. Light rainfall continued to affect some areas of the country the next few days.

The low moved into the Gulf of Mexico and eventually developed into Tropical Storm Bill by the Tuesday 16th while a tropical wave crossed Central America south of 17N. Improved weather conditions developed the next few days with only isolated showers or thunderstorms. This was as a result of a relatively dry and dusty 900-550hPa layer and a gusty east-southeasterly flow along with a convergent northwesterly flow aloft.

A few showers and isolated thunderstorms affected mostly the south during Thursday 18th but mainly fair weather with only isolated showers prevailed during Friday 19th through the Monday 22nd. Showers and thunderstorms increase over-night Tuesday 23rd into the Wednesday 24th as a surge in low level winds and moisture preceeded an approaching tropical wave. An upper level low over northwestern Yucatan provided upper level support in the form of a diffluent southwesterly flow. Moist and unstable conditions persisted over-night Thursday 25th into the Friday 26th with showers and thunderstorms again accompanied by squally conditions.

Relatively dry and hazy conditions prevailed during Friday 26th and Saturday 27th as a dry layer developed at low levels while conditions continued moist and unstable at the upper levels. Low level moisture increased during Sunday 28th while at upper levels a ridge to the west and trough east of the area supported a convergent northwesterly flow. Showers and thunderstorms affecting mostly the south of the country during night-time / early morning hours with lighter activity over the remainder of the country during the daytime and these conditions continued through the final days of June.


Monthly Weather Summary, July 2015

National Meteorological Service of Belize

The month of July 2015 saw less rain than normal. All stations recorded below average rainfall, with all stations in the north and one in the south receiving less than 25 percent of the average rain for the month. Temperatures also seemed to be a little above normal.

The month started off with mainly fair conditions and isolated shower activity, as a moderate easterly surface flow prevailed. A tropical wave on the 2nd produced some showers and thunderstorms over most areas. Punta Gorda recorded 19mm of rain on the morning of the 2nd, and Libertad a similar amount on the 3rd. The tropical wave moved away and mainly fair and dry conditions prevailed the next two days, with moderate to strong surface winds on the 3rd. The weather continued mainly fair with isolated shower activity through the 7th, except for a few morning showers over some parts of the south on the 5th. Easterly winds became fresh to strong at times. Skies then became cloudy during the afternoon and evening of the 8th and some showers developed in the evening and night. Stations over the central portion of the country received 35-40mm of rain, while Punta Gorda received almost 50mm.

An approaching tropical wave along with unstable upper level conditions caused by an upper low over southern Mexico were responsible for the increase in showers. A few showers continued over central and southern areas for the next two days as the tropical wave moved slowly away and a moderate easterly flow prevailed. Middlesex, Pomona and Punta Gorda all recorded 50-60mm of rain for the 24 hours ending at 9:00am on the 10th. The flow shifted to the east-northeast on the 11th and 12th with mainly fair conditions along with isolated showers and isolated thunderstorms. An upper ridge over the eastern Pacific resulted in a weakly convergent northwest pattern aloft. A few afternoon showers and thunderstorms affected mostly inland areas on the 13th and 15th, with isolated shower activity the day between. A light east-southeast airflow prevailed on those days. An increase in moisture and unstable upper level conditions, produced by a trough over southern Mexico on the 16th , supported some showers and thunderstorms over the south early in the morning that spread north during the day.

Punta Gorda reported 107mm of rain that morning, while Hershey reported 30mm, with all other stations receiving much less. A moderate easterly airflow, supported by a surface high/ridge over the Gulf of Mexico, with only isolated showers prevailed during the next two days as conditions dried out. A few showers and isolated thunderstorms then developed on the 19th in association with a weak surface trough over the northwest Caribbean. A moderate east-southeast airflow prevailed at the lower levels. Hershey and Punta Gorda both received 27mm of rain that morning. The airflow dried out and the next three days were mainly fair and warm. The weather continued warm on the 23rd, but with isolated showers and isolated thunderstorms. A neutral high level pattern prevailed, with an upper ridge to the south and an upper low north of the Yucatan peninsula. A moderate easterly surface flow and moderately high moisture levels supported a few showers mainly over southern districts during the day and night of the 24th. Mainly fair and warm weather then prevailed from the 25th to the 27th.

Two weak tropical waves then supported isolated thunderstorms and a few showers over most areas during the next three days. A few stations over the central and southern portion of the country received rainfall of more than 30mm during those days. The upper pattern was mostly neutral with an upper low over Honduras on the 30th. The last day of the month saw a return to mainly fair, warm and dry conditions, as the moisture decreased and the surface flow veered a bit to the east-southeast.


#507433 - 09/13/15 04:45 AM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
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Monthly Weather Summary, August 2015

Climate statistics show that the main weather features that affect the country of Belize during August are tropical waves, Tropical Upper Tropospheric Troughs (TUTTs) and an occasional tropical cyclone. The month of August is also characterized by a two-week dry spell referred to locally as the ‘Maga Season’.

August 2015 saw the passage of three tropical waves. Although a few of them were enhanced by several TUTTs, they were nevertheless rather weak and produced limited precipitation. No tropical cyclone affected the country during August this year which is overall reflective of the rather benign 2015 Atlantic Hurricane Season. An intense El Nino is responsible for the inactive season. This system is also wreaking havoc across the area as drought conditions are being experienced across most of the region including Belize. This resulted in a dry and warm August across the country.

This first day of August 2015 started off mostly sunny with only isolated showers affecting the country. However a weak tropical wave was approaching and it crossed overnight. This produced a slight increase in moisture but by the 2nd moisture was decreasing once more and showers and thunderstorms were generally isolated. Between these two days Pomona in the south recorded 6.3 mm of rain while Hershey recorded 25.1 mm.

Conditions were mainly fair and warm on the 3rd of the month with only a few brief morning showers in the interior. Similar conditions persisted on the 4th. The second tropical wave for the month crossed the country on the 5th. This system was enhanced by an upper level low and produced rainfall amounts of 7.9 mm, 6.1 mm and 9.5 mm at Belmopan, Tower Hill and Libertad, respectively. The upper low continued to produce divergent conditions on the night of the 5th and even on the 6th, although low level moisture had decreased once more. Central Farm recorded 25.0 mm of rainfall on the 6th while Hershey recorded 24.0 mm.

Warm and mostly dry conditions prevailed across the country from the 7th to the 10th and then moisture and instability increases slightly on the 11th. The main culprit was an upper level low over Yucatan which helped to support divergent conditions aloft over Belize. This resulted in cloudy spells with a few showers affecting mainly inland areas of the country. Belmopan recorded 40.1 mm of rainfall that day while Hershey got 24.0 mm.

The 12th saw a return to mostly dry conditions over the country but a few morning showers were noted. Although Melinda recorded its monthly maximum rainfall of 35.5 mm on the 13th, it was a generally dry day across the country. A similar trend continued on the 14th. However, a tropical wave (the third for the month) and an upper level low crossed the country during the night of the 14th. Left over activity from these systems produced a few morning showers and thunderstorms on the 15th. 11.3 mm of rainfall was reported at Savannah while Hershey recorded 30.0 mm. The low/trough west of the area kept upper level conditions relatively divergent on the 16 and 17th and supported generally isolated showers and thunderstorms across the country.

Conditions became mostly dry from the 18th through to the 23rd. Of the 11 stations sampled for this report, none reported significant rainfall during this period. A dry east to southeasterly airflow prevailed at the surface. While an upper low crossed the country on the night of the 21st, it did not produce any significant activity. The exception was the extreme south where an isolated thunderstorm developed that night.

The 23rd to the 28th of the month saw a slack pressure pattern develop over the area. This resulted in light winds which cause the daytime heat to become almost unbearable across the country. Rainfall continued generally low during this period but a digging polar trof from across the Gulf of Mexico would help to produce upper level instability on the 27th and 28th. This resulted in an increase in rainfall on these days. 7 of the 11 stations recorded rainfall above 5 mm on the 27th which could be characterized as a relatively wet day. The activity was mostly over the south and coast during the morning of the 27th and over inland areas during the afternoon. On the 28th activity decreased slightly but 4 stations still recorded significant rainfall (above 5 mm). The highest was Hershey with a total of 36.2 mm.

Rainfall totals decreased once more from the 29th through the 31st. The main surface feature to affect the country during this period was a surface trof which was the remnants of former Tropical Storm Erika. This caused light East to Northeasterly winds on the 29th through to early on the 30th. However, winds became East to Southeasterly later on the 30th through to the 31st and conditions continued mostly dry.

In Summary the month of August 2015 could be considered a very dry and warm month. Although a brief dry spell (the Maga Season) can be expected in this month, the dry was much more severe this year. The most likely culprit is the strong El Nino currently affecting the region. This feature continues to produce extreme drought conditions over the area. The table below summarizes the rainfall totals for the 11 sampled stations across the country compared to their monthly average. As can be seen, most stations recorded well below their average rainfall totals for the month.

Stations

August 2015 Rainfall (mm)

August Average rainfall (mm) 1981-2010

Analysis

Airport

43.3

145.9-201.6

Below Normal

Belmopan

64.6

193.2-282.6

Below Normal

Tower Hill

29.0

160.1-191.0

Below Normal

Libertad

36.7

117.7-175.7

Below Normal

Savannah

57.9

311.4-398.5

Below Normal

Central Farm

25.5

126.2-203.0

Below Normal

Melinda

62.3

218.7-241.7

Below Normal

Pomona

66.7

239.6-324.7

Below Normal


#508015 - 10/04/15 04:26 AM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
Posts: 52,953
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Monthly Weather Summary, September 2015

National Meteorological Service of Belize

September 1, 2015 was a warm and mostly dry day. Showers and thunderstorms were generally isolated. This trend continued for another two days.

On the fourth, there was an increase in low-level moisture over the area. As a result, the country experienced some showers and thunderstorms. This decreased the following day. However, the south continued to experience some showers and thunderstorms that same night. This was the trend for the next six days. Daytimes saw warm temperatures and isolated showers or thunderstorms. Nighttimes saw a few showers and thunderstorms over the south of the country.

The eleventh, twelfth, and thirteenth saw warm temperatures and isolated shower activity. The fourteenth to the sixteenth saw more shower activity, but mostly over the south. The following two days saw warm temperatures and isolated shower activity.

Moisture increased on the nineteenth and showers and thunderstorms also increased across the country. This continued through to the twenty-second. The following day, a trough of low pressure developed over the Southwest Caribbean and moved over Belize. This further supported showers and thunderstorms across the country, but more so over coastal areas. This continued through to the twenty-sixth. Showers moved from south to north of the country; the path of the trough. On the twenty-sixth, the trough moved into the Gulf of Mexico, carrying much of the moisture from over Belize.

From the twenty-sixth to the end of the month, only isolated showers or thunderstorms were observed around the country. Rainfall data obtained shows the normal pattern of rainfall, increasing from north to south. Amounts ranged from 106 millimetres in the north to 404 millimetres in the south. Generally speaking, this indicates below normal rainfall for the month of September at key stations around the country.


#509351 - 11/22/15 04:33 AM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
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Monthly Weather Summary, October 2015

National Meteorological Service of Belize

The broad cyclonic circulation of Hurricane Joaquin dominated our weather during the first few days of October. Joaquin meandered over the Central Bahamas while an induced ridge extended across Mexico and northern Central America during Friday 2nd into Saturday 3rd. A few showers and isolated thunderstorms moved from the northwest to southeast across the country during Thursday 1st associated with pre-frontal activity, then a weak cold front crossed the country during the late evening of the 2nd into the over-night and rapidly weakened into a frontal trough from Central Cuba to the Gulf of Honduras. Upper leval conditions became drier as a northeasterly flow developed and along with a dry northwesterly surface - low level flow supported mainly fair weather during Saturday 3rd. Except for isolated showers over the Maya Mountains these conditions persisted during the following days and Thursday 8th.

By Friday 9th a surface - low level trough extended from Florida to northwest Yucatan and supported a diurnal pattern of shower activity the next couple days. Over-night Saturday 10th into Sunday 11th a pre-frontal trough extended across Yucatan to just north of the country while a tropical wave along 84W approached from the east. Mainly fair weather conditions prevailed during Monday 12th and Tuesday 13th. By Wednesday 14th a divergent southwesterly flow developed aloft with a trough across the Bay of Campeche and Gulf of Tehuantepec and ridge over the Caribbean. At the surface and low levels a trough extended from offshore Costa Rica northwest through the Yucatan Channel. A few showers and isolated thunderstorms developed over the south over-night the 14th into the 15th and spread north and northwest across the country.

Relatively moist and unstable conditions developed during Thursday 15th and Tuesday 20th as the trough remained quasi-stationary while a tropical wave moved into the area. The system would develop into an area of disturbed weather accompanied by a 1008hPa low over the Gulf of Honduras with a low chance for tropical development due to proximity land. By Saturday 17th the system drifted west to the border areas of Belize and Guatemala and a broad monsoon type flow developed. At the upper levels a high straddled southern Belize and the Gulf of Honduras and provided unstable conditions aloft.

Heavy showers and intense thunderstorms developed between Belize City and Turneffe atoll over-night Sunday 18th and Monday 19th while additional showers and thunderstorms affected the eastern slopes of the Maya Mountains and later over the northern districts. The heavy rainfall produced unpresedented localized flooding in low lying areas of Belize City and Nemo / Cemo had to be activated to render assistance to stranded residents in the city who had to be admitted to shelters, while river levels also rose over some other areas of the country. Another area of low pressure developed a couple hundred miles east of Belize City by Tuesday 20th with the associated trough drifting to the coast of Belize and eastern Yucatan by Tuesday 20th. An upper level trough maintained unstable conditions aloft.

Improving conditions developed during Wednesday 21st. The upper levels dried-out as a high centered over southern Mexico supported a northerly to northwesterly flow, while at the surface a 1010hPa low was positioned over the Bay of Campeche. A light east-southeasterly flow developed, however some residual moisture supported a few showers and isolated thunderstorms over the south during the night. Mainly fair and dry weather developed the next few days. with early morning fog patches blanketing the Belize River Valley areas during Friday 23rd. Moisture increased at the upper levels during Saturday 24th and Sunday 25th but total available moisture remained relatively low as conditions were drier at or near the surface. Showers were generally isolated along with isolated air-mass thunderstorms developing inland due to daytime heating and over the south and coast over-night.

A cold front moved into the eastern Bay of Campeche by Sunday 25th and some pre-frontal activity in the form of showers and thunderstorms developed over inland areas during Monday 26th. Similar activity re-developed over the higher elevations of the Maya Mountains in the afternoon of Tuesday 27th, however conditions were mainly fair over-night. Except for some high level moisture and high clouds drifting north to south across the area, weather conditions were mainly fair and mostly dry during the last few days of October. Showers and thunderstorms were generally isolated.


#509780 - 12/09/15 04:24 AM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
Posts: 52,953
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Monthly Weather Summary, November 2015

National Meteorological Service of Belize

November 2015 was rather wet, with most stations across the country receiving two to three to times the normal monthly rainfall. No cold front crossed the country; however a weak and dissipating frontal trough did drift south across our area near the end of the month.

The month started off mainly fair with only isolated shower activity. The Atlantic ridge extending into the NW Caribbean supported a moderate east-southeast surface flow on the first day, then the ridge retreated, and a light east-northeast flow prevailed. The upper pattern was weakly convergent, with a TUTT low moving south to near NE Honduras on the 3rd. The weather became cloudy and showery on the 4th; the moisture increased as a surface trough approached from the east. The PGIA recorded 23mm of rain, the most for that day. A few showers lingered mainly over northern districts over the next two days, as a low developed near northern Belize and moved northwest to northern Yucatan by the 6th. Generally isolated showers prevailed on the 7th, and an east-southeast surface flow dominated the surface and low levels. The next four days (8-11) was cloudy at times with a few showers over most areas along with isolated thunderstorms. A weak tropical wave crossed on the 10th and a more active one on the 12th. The airflow became moist on the 12th and the surface flow backed to the east-northeast. Showers increased, especially over the south. The upper pattern varied from weakly divergent to neutral from the 8th to the 11th, then became divergent on the 12th as an upper trough to the west amplified. Cloudy to over skies then prevailed from the 13th to the 16th, with several showers and intermittent periods of light rain especially over the south. Rainfall from the 12th to the 15th ranged from a little than less than 100mm in the north to just above 300mm in the south. A surface trough moved slowly across the country on the 14th, then lingered from the Bay of Campeche, across Belize, to northwest Honduras for the day, after which it drifted west and dissipated. The heavy rains in the south that weekend resulted in flooding of some rivers and nearby villages in the Toledo district. The airflow then veered to the east-southeast on the 17th and conditions improved by that afternoon. Only isolated showers prevailed the next day then the moisture increased once again on the 19th, as a weak surface low developed east of Nicaragua and the flow backed to the east-northeast. A few showers occurred over most areas that day and the following. A light easterly surface flow, moderate moisture levels and a neutral upper pattern result isolated showers on the 21st. The next three days (22-24) saw partly cloudy skies with a few showers mainly over southern districts, as a cold front approached and stalled just north of Belize on the 24th. The associated surface ridge over southern Mexico caused the surface flow to become northwesterly as the front stalled under a weakly convergent upper pattern. The front weakened the next day and showers were generally isolated, but increased during the night. The dissipating frontal trough/ remnants then drifted south on the 26th and produced cloudy and showery weather mainly over central and southern areas, as a moderate northeasterly low level flow prevailed. Some stations in the central regions of the country recorded 75-85mm of rainfall on the 26th. The upper pattern was weakly convergent, with a ridge over our area from an upper high centered over southern Mexico. The moisture decreased and showers were isolated on the 27th and 29th; but a few light showers / light rain affected central and northern areas on the 28th and 30th. A convergent surface pattern and slight increases in moisture was responsible for this off and on slight to moderate increase in showers, as the upper pattern continued subsident/convergent.


#510642 - 01/14/16 03:52 AM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
Posts: 52,953
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Monthly Weather Summary, December 2015

National Meteorological Service of Belize

Climatology shows that the main features influencing weather across the country of Belize in December are cold fronts, upper level troughs and the development of moist northeasterly airflows in the area. There was no frontal passage in December of 2015.  However, a couple fronts stalled over or just north of the country resulting in relatively moist conditions over the area. The upper levels were mostly dry during the month.   

On the first day of December a surface trough over the Gulf of Honduras supported a moist North to Northeasterly airflow over the country. This resulted in cloudy skies at times with a few showers and light rain across the country. The same feature continued on the 2nd but conditions were  a bit drier that day with only isolated showers developing. On the 3rd the trough moved a little closer to the country and moisture increased once more. Skies were cloudy with a few showers and light rain mainly over the Sea and along the coast. Similar conditions continued the following day with a weak low developing along the surface trough. On the 5th, the National Hurricane Center analyzed a stationary front east of the country. However, all observations indicated that the front was further north over Yucatan and instead the feature analyzed as the front was actually the persistent surface trough. Showers increased that day and conditions were a bit moist until the 7th.

Moisture decreased during the 8th  and by the 9th weather conditions were mainly fair with only isolated showers.  The dry spell was interrupted briefly on the 10th when skies were generally cloudy with a few showers and isolated thunderstorms mainly over central and southern areas of the country.  The 11th was a bit drier and then moisture increased slightly again on the 12th resulting in partly cloudy to cloudy skies with a few showers.

Weather conditions were mostly dry from the 13th to the 17th. During this time a frontal boundary persisted in the Gulf of Mexico and a slack pressure pattern dominated over the Northwest Caribbean Sea and Belize.  The result was a light and mostly dry east to southeasterly airflow over the country.

By the 18th a cold front advanced to the northwest Yucatan Peninsula resulting in a slight increase in moisture over the country. Conditions became even more moist on the 19th as the front became stationary over Belize. Additionally, a short-wave trough at the upper levels was just west of the country and supported moderately divergent conditions aloft. These conditions supported an increase in convective instability over the area and thunder was observed at the airport during the night  of the 19th into the early morning hours of the 20th. Cloudiness and showers decreased later on the 20th and conditions became generally dry on the 21st.

Another dry spell developed over the area from the 21st through to the 28th of December 2015. The dominant feature during this time was the Atlantic ridge to the northeast. This feature combined with a moderately intense Panamanian low over the southwest Caribbean caused tight pressure gradients over the area. The result was a gusty and dry southeasterly airflow that persisted through the Christmas holiday. Rainfall was limited with only isolated showers occurring mostly at nighttime and mainly on the eastern slopes of the Maya Mountains.

Moisture increased slightly on the 29th. This occurred as a cold front dipped into the eastern Gulf of Mexico causing winds to decrease slightly over the area. The cold front would not make it as far as Yucatan and gradually retrogressed into the northwest Gulf. However, conditions remained marginally moist through to the end of the month. Showers were generally isolated on the 30th but a few more developed over inland and southern areas to close off the month on the 31st.

Table 1 below shows the rainfall recorded in December 2015 versus the climatological mean for the month  for a few of the weather stations across the country. From the table it can be seen that most stations in the north recorded above average rainfall while a few in the south and the west recorded below average. 

Table 1.

Stations

Rainfall recorded (mm)

December Average (mm)

Percentage of Average (%)

AIRPORT

168.2

144.6

116.3

CENTRAL FARM

69.3

124.3

55.8          

TOWER HILL

87.7

69.9

125.5

LIBERTAD

143.0

69.2

206.6

SAVANNAH

110.7

147.9

74.8

MELINDA

156.3

150.8

103.6

SPANISH LOOKOUT

114.7

125.5

91.4


#511340 - 02/04/16 04:44 AM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
Posts: 52,953
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Monthly Weather Summary, January 2016

National Meteorological Service of Belize

January 2016 began with a few coastal showers in Belize. Showers were also observed over the south. A moist north-easterly air flow was dominating as a result of a stationary front in the Bay of Campeche, Mexico. These showers continued on the second day of the month and became isolated on the third.

The first cold front for the month crossed the country on the fourth day. The only indication of its passage was light showers moving from west to east, along with the backing of the winds to the northwest. Showers were observed over and near Belize through to the sixth.

The country experienced little rainfall activity during the next three days, as the frontal system moved out of the area and winds veered to the east and southeast. On the tenth day, another cold front crossed the country. Again, not much rainfall activity was observed. The front moved just off shore and dissipated, supporting showers inland and over the south during the next four days.

The following two days, the fifteenth and sixteenth saw sunny and clear conditions, with no rainfall. No rainfall was observed on the seventeenth when yet another cold front made its way across the country. Cool and dry weather dominated on the eighteenth and nineteenth. It moved just off shore where it became stationary, lingering there through to the twenty-first. The proximity of the frontal system supported cloudy conditions across the country and light showers were observed mostly over central and northern areas.

On the twenty-second afternoon, a few light showers were observed over inland areas as yet another cold front approached the country. It crossed later that night with very little rainfall. It moved very quickly east and south of the country and the associated high-pressure ridge supported cool and dry conditions during the following four days.

On the twenty-seventh, another cold front approached the country. Pre-frontal activity was evident as isolated showers and an isolated thunderstorm over the Maya Mountains. The front quickly crossed the country on the twenty-eight evening with light showers and strong, gusty winds over some parts of the north.

The remaining three days of the month was uneventful. Cool and dry conditions prevailed.

In conclusion, five cold fronts crossed Belize during January 2016. Cool temperatures were recorded, but they were well within the normal range. All of the cold fronts were relatively dry and data analysis shows that rainfall for this month was well below the average for this time of the year.

Station  January_2016    Normal (1981-2010)

Station

January_2016

Normal (1981-2010)

Libertad

37.6

59.4

Tower Hill

12.7

72.4

La Milpa

17.1

64.7

Philip Goldson Airport

62.3

152.6

St.Johns (Belize City)

87

128.6

Belize Zoo

65.8

134.9

Belmopan

59.8

125

Spanish Lookout

28.2

93.4

Baldy Beacon

96

224

Middlesex

57.5

171

Pomona

162.7

Melinda

47

157.9

Savannah Forest Stn

81.8

135.7

Punta Gorda Agri. Stn

42.6

146.3


#512276 - 03/09/16 06:09 AM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
Posts: 52,953
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Monthly Weather Summary, February 2016

National Meteorological Service of Belize

A moderate and relatively dry east-southeasterly airflow prevailed during Monday 1st of February through Wednesday 3rd when winds backed to the northeast ahead of an approaching cold front. Some pre-frontal activity developed during Thursday 4th as a north to south line of showers developed from near Orange walk Town to offshore Placencia and moved eastwards. A gusty northwesterly flow developed in the wake of the shear-line. The associated cold front crossed Yucatan and Belize by early morning Friday 5th with light rain / drizzle affecting some areas of the country through Saturday 6th. By Sunday 7th skies cleared as the cool and gusty northwesterly flow dominated. A series of re-enforcing surges of cooler air settled over the area the following couple of days and maintained cool and relatively dry conditions through Thursday 11th. A few showers and periods of light rain returned to some ares over-night Thursday 11 through midday Friday 12th and again during the night of Saturday 13th as moisture returned over the area in a northeasterly flow.

Strong high pressures offshore the Carolinas resulted in the development of a moderate southeasterly airflow over our area and pushed residual moisture across the central to northern areas of the country by Monday 15th. Cloudy condiitions developed during Tuesday 16th as a small cyclonic vertex developed offshore Belize and Honduras and supported northwesterly winds over-land and a southeasterly flow at the Cayes. Showers occurred mostly over northern and along some coastal areas.

By the Tuesday 16th another cold front was over the Gulf of Mexico and the associated Continental high centered over Texas supported a northeasterly flow. Skies were cloudy along with showers occurring over the norhern districts and north facing slopes of the Maya Mountains. The weak frontal boundary meandered between southeastern Yucatan and Belize through Wednesday 17th. Showers and periods of rain affected northern coastal areas at first then increased over most areas over-night into Thursday 18th. The focus for showers and rain continued to the south of the country into Friday 19th as a gusty northeasterly flow developed in response to strong high pressures over the southeastern United States.

Mainly fair weather with only isolated showers prevailed during Saturday 20th through Monday 22nd as deepening low over Texas pulled a southeasterly flow over the Northwest Caribbean, Yucatan and Belize. Winds backed to northwesterly and became gusty over-night into Tuesday 23rd as another cold front approached. Late evening pre-frontal showers and isolated thunderstorms developed over northern and inland areas During Wednesday 24th and spread east to the central and south coast. The cold front crossed the country by early-morning Thursday 25th with showers and rain continuing over and offshore the south of the country.

A gusty northeasterly airflow prevailed during Thursday 25th through Sunday 28th with some periods of light rain affetcting the central and some coastal areas of the country. Conditions became mainly fair, cool and dry during Monday 29th.


#512277 - 03/09/16 06:21 AM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 2001
Posts: 5,607
Diane Campbell Offline
.
Diane Campbell  Offline
And no mention of this wind event?

#512947 - 04/09/16 04:43 AM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
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Monthly Weather Summary, March 2016

National Meteorological Service of Belize

Only one cold front crossed the country in March of this year; while rainfall was above normal at some stations in the south and one in the northwest.

The first two days of the month was mainly fair with only isolated showers. A weak surface ridge over the central Gulf of Mexico supported a relatively dry east-northeast airflow over our area. On the 3rd, skies became cloudy and a few showers affected inland areas during the day. Tower Hill and Melinda recorded just under an inch of rain for that day. During the night and the next day, some light rain moving from west to east affected central and northern districts as conditions became moist, especially in the mid levels of the atmosphere. An upper low over northern Mexico produced a divergent southwest upper flow over the region. Pomona received almost three inches of rain, with all other stations well under one inch. A few periods of light rain continued on Saturday 5th, along with an isolated thunderstorm in the Belize City area in the afternoon. The rain gauge at St Johns College recorded just over one inch or rain, while Baldi beacon had about half an inch more. On the 6th, conditions continued relatively moist and a few showers affected mostly southern districts, with Punta Gorda getting about two and a half inches of rain. The rains spread to most areas the next day, though not as intense, and decreased by that evening. The surface flow had veered to the east under the influence of a ridge that extended from the Atlantic to the eastern Gulf of Mexico and the northwest Caribbean Sea, and the moisture was starting to decrease.

The surface ridge to the north and northeast strengthened further and resulted in a moderate to fresh, and mostly dry, east-southeast airflow over our area for the next five days (8th-12th). A divergent upper southwest flow supported isolated thunderstorms over the extreme southwest on the 12th. The gradient then relaxed a little, but the dry east-southeast flow continued for the next seven days (13th-19th), with conditions gradually warming up. An approaching cold front induced cloudy skies along with isolated showers and thunderstorms on the 20th, then produced some light rain along with strong gusty northerly winds as it crossed during the next day. Baldi Beacon reported over two inches of rain for the 20th, while Middlesex had over one and one half inches. Skies continued cloudy on the 22nd with a few light showers/rain over the south and west, and only isolated showers/rain the next day as the front retrogressed and dissipated over our area. The surface flow veered to the east-southeast and the moisture decreased further on the 24th, resulting in seasonally fair and warm weather to the end of the month. The upper pattern was weakly divergent at first, but became weakly convergent by the last two days.


#513630 - 05/10/16 05:10 AM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
Posts: 52,953
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Monthly Weather Summary, April 2016

National Meteorological Service of Belize

Climatologically, the Atlantic High Pressure ridge usually dominates the region during the month of April. Its orientation typically produces a dry southeasterly airflow across the country. At times heat-lows may develop across southern Mexico which causes pressure gradients to tighten over the area resulting in gusty winds. However, when the centres of these systems are over or very near the country, pressure gradients would instead slacken causing light winds and an excessively high heat-index. This overall synoptic pattern for the month normally corresponds with dry and warm weather. The only relief would come in the form of an occasional cold front. On average about two cold fronts would cross the country during the month. These may be accompanied by strong to severe thunderstorms and they are the main producers of the little rainfall for the month. April 2016 was characteristically warm but much drier than normal. This is likely due to the fact that only one weak frontal boundary affected the country.

The first day of April 2016, started out mainly fair and warm as a dry easterly to southeasterly surface flow dominated the area. A cold front was approaching the next day with a prefrontal trof crossing the country during the night. This supported an increase in moisture with a few showers and thunderstorms. Moisture would continue relatively high during the next few days from the 3rd to the 5th as the weak front stalled just north of Belize and gradually dissipated. Its remnants drifted south during the night of the 5th and by the 6th light showers and rain were confined to the south.

Moisture decreased on the 7th and conditions continued mainly fair and dry for the next few days. However, daytime temperatures were slightly lower than normal up until the 12th. This was largely due to an anomalous easterly to east-northeasterly surface flow.

The normal synoptic pattern became established on the 13th and the warm and dry easterly to southeasterly airflow developed over the area. This continued until the 17th and little to no rainfall was recorded during this period.

Winds backed up once again to the east and then east to northeast between the 18th and the 24th. This wind shift initially supported slightly cloudier conditions across the country on the 19th and 20th as a weak moisture surge developed. This produced a very slight increase in showers across the country. However, by the 21st moisture decreased once more even though the surface flow remained easterly to east-northeasterly.

The high pressure system moved off to the east of the Continental United States on the 25th. Its new orientation caused the surface flow to veer to the east-southeast over Belize and temperatures gradually increased over the area. Additionally, heat lows began developing to the northwest around the 29th. The pressure gradients therefore tightened and the easterly to southeasterly flow became gusty on the last two days of the month.

As mentioned previously rainfall was well below normal during April 2016. Except for the showers experienced between the 2nd and the 6th and the weak moisture surge between the 19th and 20th no significant rainfall occurred. Figure 1, below indicates that most stations across the country recorded below normal rainfall except for Tower Hill in the north and Baldy Beacon over the Mountain Pine Ridge area.



#514236 - 06/07/16 03:26 AM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
Posts: 52,953
Marty Offline
Marty  Offline

Monthly Weather Summary, May 2016

National Meteorological Service of Belize

May in Belize is considered the hottest month of the year. Indeed May 2016 was hot, but it also proved to be more.

From the first to the fourth, dry and stable conditions prevailed. No rainfall was recorded at any of the stations. On the fourth night, however, pre-frontal activities supported an outbreak of showers and thunderstorms which moved from north to south across the country.

On the fifth, the trailing cold front crossed the country without producing any rainfall. Showers were observed late that night over the extreme south of the country.

From the sixth to the fifteenth, isolated to a few showers were all that were observed around the country. The bulk of these were observed over the extreme south.

From the sixteenth, to the end of the month, fair, warm and mostly dry conditions prevailed.

In conclusion, high temperatures were recorded, but none record breaking. One cold front crossed the country between the fourth and fifth of the month. Even though pre-frontal activities supported showers and thunderstorms, all other days were mostly dry. The final rainfall data shows most of the stations recorded well below the average. In fact, data shows record breaking amounts far below the normal.


 

Station

May2016

Normal

 

Libertad        

NA

103.4

 

Tower Hill 

39.8

118.3

 

Rio Bravo La Milpa

9.7

110.1

 

Philip Goldson Airport

11.7

138.2

 

St John's Belize City

           NA

82.6

 

Belize Zoo

62

121.3

 

La Democracia

53.5

NA

 

Belmopan

52.1

96.5

 

Central Farm

13.5

91

 

Spanish Lookout

NA

106.7

 

Baldy Beacon

13.4

254.9

 

Humminbird Hershey

128.2

143.8

 

Middlesex

NA

180.4

 

Pomona

45.1

207.5

 

Melinda

42

158.7

 

Savannah Forest Stn        

44.3

129.1

 

Punta Gorda Agri. Stn

32

180.5

 

 

 


#516158 - 07/23/16 04:17 AM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
Posts: 52,953
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Monthly Weather Summary, June 2016

National Meteorological Service of Belize

June marks the start of the rainy season in Belize which coincides with the hurricane season that runs from June to November. Weather conditions were mainly fair across the country during the first couple of days. An approaching tropical wave during the Friday 3rd supported a east-northeasterly airflow and an increase in moisure and showers over northern areas of the country as a developing low was observed to the east. The developing low / area of disturbed weather maintained moist and unstable conditions the next few days with showers and thunderstorms spreading across the country from the southwest to the northeast during Sat 4th and spread northeastwards across central and northern areas during Sun. 5th. By midday the low / area of disturbed weather was upgraded to tropical Depression #3 and to Tropical Storm Colin just north of Yucatan later that evening. Except for lingering showers and thundestoerms over the south of the country, weather conditions improved over-night Monday 6th into Tuesday 7th.

During the Tuesday 7th, a tough of low pressure developed over the Northwest Caribbean Sea from east of Belize to south Florida. The resulting east-southeasterly flow at the surface and low levels resulted in showers spreading northwestwards across central and northern areas of the country through Friday 10th. An induced surface trough / reflection of an upper level low then approached our area. As the upper level low crossed southern Belize the surface trough / wave moved across 86w south of 15n. The increase in moisture along with a diffluent / diverent upper level pattern between the low and a trailing upper level ridge supported showers and thunderstorms through Saturday 11th into Sunday 12th.

Mainly fair weather prevailed during the daytime of Monday 13th through Thursday 16th under the influence of a moderate and gusty east-southeasterly airflow. However, a few showers and thunderstorms affecting mostly the south of the country during the night-time / early morning hours. Another tropical wave crossed the country during Friday 17th. The wave was accompanied by a weak low at low to mid levels of the atmosphere east of northern Belize and Yucatan and supported a surge in low level winds. Showers and thunderstorms affected northern and inland areas during peak daytime heating hours, then increased along the central and northern coastline during the night-time resulting in localized floodings of streets and residents in the north. The low continued to influence our weather with an MCS developing over the Ladyville / Belize City area over-night Friday 18th into Saturday 19th and produced heavy rainfall accumulation at the PGIA by midday Sunday 19th. The system tracked across southeastern Mexico / Yucatan and Guatemala and was upgrded to Tropica Depression #4 over the southern Gulf of Mexico by Saturday 19th and eventually into tropical storm Danielle over the southwest Gulf of Mexico / Bay of Campeche early Sunday 20th.

A relatively moist east-northeasterly airflow prevaled as yet another tropical wave approached and was supported by diffleunt pattern aloft between the low over northwestern Yucatan and ridge dominating northern Central America and the western Caribbean. A weak low developed in association with the wave along 87W then crossed the country during Tuesday 22nd. Showers, thunderstorms and periods of rain affected most areas of the country through Wednesday 23rd then occurred in a more diurnal pattern the next few days affecting especially the south during the night-time.

An upper level trough was over the Bay of Campeche as another tropical wave approached the country and supported an eastnortheasterly surface and low level flow. The wave crossed the area over-night Monday 27th into Tuesday 28th and showers and thunderstorms affected most areas. Except for night-time showers continuing to affect the south of the country at night-time, weather conditions were mainly fair over most areas the next few days through the end of the month.


#517142 - 08/28/16 04:29 AM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
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Monthly Weather Summary, July 2016

National Meteorological Service of Belize

Six, mostly weak, tropical waves crossed the country during the month of July 2016, and rainfall was below average, except over the extreme south. Some stations in the north received only one third of their normal rain for the month, while Punta Gorda received about one quarter more than normal.

The month started with a few showers and thunderstorms over southern districts, which became isolated the next day as moisture levels decreased over our area. A moderate easterly surface flow prevailed along with a neutral upper level pattern. A weak tropical wave then supported a few light showers and isolated thunderstorms over most areas on the 3rd, then mainly over northern districts on the 4th. The next two days were generally fair, with a few showers and thunderstorms continuing over the south, especially at night, as moisture levels remained high over the south, and the upper pattern being weakly divergent with an anticyclone to the east.

Another weak tropical wave resulted in a few showers and brief thunderstorms over most areas during the day of the 7th, which continued over the south during the night. Winds were gusty and the low level pattern convergent. Rainfall over the Toledo district totalled four to five inches for the 7th. The weather returned to mainly fair with isolated shower activity the next four days (8th-11th), except for the south where a few showers and thunderstorms continued mostly at night. Southern Toledo averaged one inch of rain per day (night). These southern showers continued into the morning on the 10th and 11th. A surface ridge over the northern Gulf of Mexico maintained the moderate easterly airflow over our area.

The 12th saw a few showers and thunderstorms over most areas as a weak tropical wave moved across the country. A weakly divergent upper pattern supported these showers. Rainfall was less than one inch at most stations. During the next four days (13th-16th) the weather was mainly fair with isolated showers and thunderstorms, except for the south again at night. Punta Gorda recorded three and one half inches of rain on the 16th. A light east to east-northeast surface airflow prevailed on those days along with relatively low moisture and a neutral upper pattern. Showers and thunderstorms then increased mainly over the south and central areas on the 17th and continued to the 19th when another tropical wave crossed the country. One to two inches of rain was recorded over central portions of the country. The rains decreased by the next afternoon, and mainly fair weather prevailed on the 21st and 22nd, except again over the south during the night-time hours.

Another weak tropical wave produced a slight to moderate increase in rainfall and resulted in few showers and thunderstorms over most areas on the 23rd. The weather then returned to mainly fair the next four days (24th -27th) with showers during the morning of the 26th and over the south most nights. Punta Gorda continued to receive two to four inches of rain per day (night). The surface flow was generally easterly and moderate, while the upper pattern neutral to weakly divergent with an inverted trof axis from Nicaragua to central Cuba. A few showers and thunderstorms developed over the interior on the 28th, mainly due to heating and increasing moisture. Another tropical wave supported showers and thunderstorms over most areas on the 29th, with the extreme south seeing almost four inches of rain and generally less than one inch elsewhere. Fair and mainly dry weather prevailed the next day, with a slight increase in showers and thunderstorms coming on the last day of the month.


#517570 - 09/16/16 04:58 AM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
Posts: 52,953
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Monthly Weather Summary, August 2016

National Meteorological Service of Belize

Climate statistics show that the main weather features that affect the country of Belize during August are tropical waves, Tropical Upper Tropospheric Troughs (TUTTs) and an occasional tropical cyclone. The month of August is also characterized by a two-week dry spell referred to locally as the ‘Maga Season’.

August 2016 saw the passage of seven tropical waves most of which were rather weak. The most significant feature to affect the country was Hurricane Earl which caused wind and storm surge damage mainly in the Ladyville area. Additionally, excess rainfall amounts over central areas of the country resulted in flooding particularly in the west.

Moisture gradually increased across the country during the first two days of August as the area came under a northeasterly surface flow ahead of the system which later developed into Hurricane Earl. Tropical Storm Earl formed just south of Jamaica at around 16Z (10 a.m. local time) on the 2nd of August. The system was moving westward at a relatively fast pace and by the 3rd August outer rain bands from Earl began affecting Belize. Skies were cloudy with some outbreak of showers and thunderstorms that day. Earl was upgraded to a hurricane at 21Z (3 p.m. local time) on the 3rd and made landfall later that night at about 11:53 p.m. local time as a category 1 hurricane with maximum sustained winds of 80 mph. Landfall was about 13 miles south-southwest of Belize City. The highest wind gusts observed was at Half-Moon Caye where a 104 mph wind gust was recorded. At the Airport the highest gusts was 73 mph while at Port of Belize in Belize City it was 80 mph. Earl also caused a storm surge of about 3-5 feet particularly in the Vista Del Mar area of Ladyville. Hurricane Earl made a sudden southwestward wobble just before landfall and continued that motion across Belize with its center passing just south of Belmopan before moving further west. Torrential rainfall in the west resulted in flooding of the Macal River. Weather conditions gradually improved on the 5th as the system moved further west into Guatemala and eventually emerged in the Bay of Campeche before making a second landfall near Vera Cruz, Mexico on August 6th.

Moisture remained relatively high over Belize during the days immediately after Earl but rainfall totals were minimal. The relatively fair weather continued through to the 8th when a weak and rather inactive tropical wave crossed the country. Another weak tropical wave crossed on the night of the 9th resulting in showers and thunderstorms in the south.

Fair weather prevailed across the country on the 10th and 11th and then moisture begun increasing on the 12th ahead of another tropical wave. This resulted in a few showers and thunderstorms which continued on the 13th when the wave crossed. Moisture and instability, though decreasing, remained relatively high on the 14th causing a few more showers and thunderstorms across the country. Additionally, there were reports of a tornado-like storm affecting the Spanish Lookout area on the 14th.

An easterly to southeasterly airflow supported mainly fair weather on the 15th and most of the 16th with the exception of a few showers that affected mainly central and northern areas. This increase on the 16th was due the approach of yet another tropical wave. This wave crossed on the 17th causing moist conditions with a few showers and thunderstorms mainly over northern and central areas. Moisture decreased on the 18th and generally fair weather prevailed with only a few early morning showers and thunderstorms over the south.

Moisture increased once more on the 19th ahead of tropical wave number 5 for the month which crossed on the 20th. A brief reduction in moisture on the 21st was short-lived as yet another tropical wave was approaching. Tropical wave number 6 crossed on the night on of the 22nd resulting in showers and thunderstorms mainly over the south which continued early on the 23rd. Conditions continued slightly moist on the 24th and 25th as broad trofing developed over the central Caribbean and supported an east to northeasterly surface flow over Belize. A slack pressure pattern developed on the 26th causing light and variable early morning winds which became north to northeasterly later in the day. Weather conditions were mainly fair with only isolated showers and isolated thunderstorms.

The last tropical wave for the month was approaching on the 27th with a weak area of low pressure embedded along its axis over the northwest Caribbean. A distinct low level swirl was noted on visible satellite imagery. This wave became rather ill-defined thereafter and no significant weather affected the country with its passage.

The last few days of the month (August 28 to 31) saw a slack pressure pattern over the area resulting in light winds and very warm daytime temperatures. Conditions were generally fair with afternoon thunderstorms affecting mainly inland areas of the country.

The figures below show a summary of the rainfall activity for the month. The figure at the top shows the total rainfall recorded. As can be seen the highest rainfall was recorded over the central mountainous areas of the country with Baldy Beacon recording a total of 447.9 mm. The figure at the bottom shows how this rainfall compares to average as it shows what percentage of the normal was recorded. Blue colors indicate above normal while red colors indicate below normal rainfall. The figure clearly indicates that the south got significantly less rainfall than normal. Northern areas were also below normal but slightly less so compared to the south. Central areas of the country recorded above normal rainfall. This area of above normal rainfall correlates directly with the path taken by Hurricane Earl. This suggests that the excess rainfall from Hurricane Earl was likely the main factor contributing to above normal rainfall in this area.




#518100 - 10/08/16 04:27 AM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
Posts: 52,953
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Monthly Weather Summary, September 2016

National Meteorological Service of Belize

September 2016 in Belize was mostly moist, especially over the south and over inland areas. The first day started with a few showers and isolated thunderstorms over the south. On the second and third day, fair weather prevailed, with only isolated showers and isolated thunderstorms. On the second night, however, the south experienced a few more.

On the fourth day, a weak tropical wave approached the country. This wave was associated with moisture preceding it and so a few showers and thunderstorms affected the country on the fourth and fifth. The following two days were sunny and fair with isolated showers and isolated thunderstorms.

Another tropical wave affected the country on the eighth and ninth day. The north of the country experienced the bulk of the rainfall. Mainly fair weather followed on the tenth and eleventh day, except for afternoon hours, when inland areas experienced a few showers and thunderstorms.

On the twelfth, the country experienced early morning coastal showers and inland afternoon showers. That same night, another tropical wave crossed the country, spreading showers and thunderstorms around the country.

From the thirteenth to the twenty-first, relatively moist and unstable conditions supported a few showers and thunderstorms over the south and coast at night and over inland areas in the afternoons. Showers continued around the country on the twenty-second and twenty-third , when yet another tropical wave crossed the country.

Over the following three days, relatively moist and unstable conditions supported a few showers, thunderstorms and periods of rain around the country. On the twenty-eighth and twenty-ninth, another tropical wave approached and crossed the country, but supported no significant rainfall. However, on the last day of the month, an upper-level trough over the area, supported unstable atmospheric conditions. At the same time, low-level moisture increased and so the country experienced a few showers and thunderstorms.

In conclusion, the country experienced a relatively moist September in 2016. Five tropical waves were noted to have crossed the country, supporting showers and thunderstorms, except for one that produced no significant rainfall. Apart from these rain makers, moist and unstable conditions were the other supporting factors for the rainfall this month. Present data shows that this September rainfall fell within the normal range for this time of the year.

September 2016 in Belize was mostly moist, especially over the south and over inland areas. The first day started with a few showers and isolated thunderstorms over the south. On the second and third day, fair weather prevailed, with only isolated showers and isolated thunderstorms. On the second night, however, the south experienced a few more.

On the fourth day, a weak tropical wave approached the country. This wave was associated with moisture preceding it and so a few showers and thunderstorms affected the country on the fourth and fifth. The following two days were sunny and fair with isolated showers and isolated thunderstorms.

Another tropical wave affected the country on the eighth and ninth day. The north of the country experienced the bulk of the rainfall. Mainly fair weather followed on the tenth and eleventh day, except for afternoon hours, when inland areas experienced a few showers and thunderstorms.

On the twelfth, the country experienced early morning coastal showers and inland afternoon showers. That same night, another tropical wave crossed the country, spreading showers and thunderstorms around the country.

From the thirteenth to the twenty-first, relatively moist and unstable conditions supported a few showers and thunderstorms over the south and coast at night and over inland areas in the afternoons. Showers continued around the country on the twenty-second and twenty-third , when yet another tropical wave crossed the country.

Over the following three days, relatively moist and unstable conditions supported a few showers, thunderstorms and periods of rain around the country. On the twenty-eighth and twenty-ninth, another tropical wave approached and crossed the country, but supported no significant rainfall. However, on the last day of the month, an upper-level trough over the area, supported unstable atmospheric conditions. At the same time, low-level moisture increased and so the country experienced a few showers and thunderstorms.

In conclusion, the country experienced a relatively moist September in 2016. Five tropical waves were noted to have crossed the country, supporting showers and thunderstorms, except for one that produced no significant rainfall. Apart from these rain makers, moist and unstable conditions were the other supporting factors for the rainfall this month. Present data shows that this September rainfall fell within the normal range for this time of the year.

 

Station

September

Normal

Libertad

111.9

198.1

Towerhill

187.8

191.6

Philip Goldson Airport

160.7

258.8

Central Farm

88.6

177.4

Middlesex

246.5

354.8

Melinda

260.2

241

Spanish Lookout

130.8

174.4

Savannah Forest Stn       

393.9

365.3

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#519319 - 11/27/16 11:19 PM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
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Monthly Weather Summary, October 2016

National Meteorological Service of Belize

The month of October saw below average rainfall for most stations as rainfall from tropical waves were limited. Weather conditions were affected by persistent low surface pressures over the southwestern and western Caribbean Sea and transient upper level Tutt lows.

A few showers occurred over the north and coast over-night into the 1st and over the mountains in the south during the daytime. The broad circulation of Category 4 Hurricane Matthew centered over the southeastern Caribbean dominated our weather during the first few days of the month. This supported a light and relatively dry northeasterly airflow during the 2nd through the 4th as Matthew moved north across the Caribbean towards western Hispaniola / Haiti and eastern Cuba. At upper levels a Tutt low over the western / central Caribbean moved west of our area by the 2nd and back east of our area by the 5th. This initially supported a convergent northwesterly flow aloft. However on the 2nd it supported isolated thunderstorms in the vicinity of the PGIA and the northern slopes of the Maya Mountains. Then by the 5th and the upper level northwesterly flow became a bit convergent. Weather conditions were mainly fair during the 7th, however during the 8th to 11th a relatively slack pressure gradient supported light winds and in a deep layer southerly flow with increasing upper level moisture, isolated thunderstorm developed in the south at night-time with showers and rain spreading across the country.

The upper levels became drier by Wednesday 12th due to a north-northwesterly flow from a ridge to the west. At low levels a surface trough across the northwestern Caribbean supported a north-northeasterly flow and mainly fair conditions through Thursday 13th. High resolution satellite imagery detected a cyclonic swirl of low clouds centered near 18N 84W and this produced showers over and offshore the south over-night and along the north coast and higher elevations inland during the daytime. This activity was supported by a weakly divergent westerly - southwesterly flow aloft from an upper level low south of western Cuba. This pattern of diurnal shower activity continued Through the 16th. During the 17th and 18th, light winds resulted in land breeze effect over-night. Showers developed mostly over the sea due to coastal convergence and shower activity affected the south and coastal areas during the night and early morning hours with additional activity developing inland and in the higher elevations at peak daytime heating hours. During the 19th showers moved from the sea to northern coastal areas. Then with the upper level high centered over the Gulf of Tehuantepec, the resulting northwesterly flow supported a drying trend through the 20th. Night-time / early morning showers were confined to mostly coastal waters during the 21st with isolated showers over the Maya mountains on the 22nd.

By the 23rd a cold front stalled over northern Yucatan with a shear-line developing between Hisopaniola and northeastern Nicaragua. Over our area a convergent / long fetch northeasterly flow developed, while at upper levels a trough extended down to the northwestern Caribbean with a ridge extending north from the eastern Pacific across Mexico and into the central United States. Afternoon showers affected mostly southern and inland areas, becoming generally isolated over-night into Monday 24th.

Remnant moisture from the dissipating frontal boundary drifted south and southwest from the northwestern Caribbean and supported mostly low-topped showers and periods of rain over most areas during the 25th. By the 26th a Tutt low was centered over Yucatan and provided support for a surface trough extending from the Bay of Campeche to the northwestern Caribbean Sea. Showers, periods of rain and isolated thunderstorms developed over and offshore northern and central areas of the country through the 27th. During the 28th a surface low over the northwestern Caribbean supported a northwesterly flow over our area and weather conditions turned out mainly fair with clear skies at night and little or no rainfall.

Cloudy conditions (layered low and high clouds) prevailed during the 29th and 30th with a moist southerly flow aloft and northwesterly low level flow which confined most showers and thunderstorms to coastal waters east of the reef. However by the evening, showers and thunderstorms developed from near SandHill south-southeastwards to just west of Dangriga and drifted westwards, with a few more developing over southern coastal waters during the night.


Station Total October 2016 Normal
Libertad 96 181.8
Tower Hill 79.2 178.6
Airport 128.9 281.9
Central Farm 131.8 205.1
Belmopan 121 209.6
Pomona 229.4 301.1
Melinda 190.1 287.3
Spanish Lookout 169.3 205.9
Savannah    290.6 277.5
Punta Gorda  232.2 346.6
SJC (Belize City) 178.6 259.6

#520577 - 12/30/16 11:50 PM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
Posts: 52,953
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Monthly Weather Summary, November 2016

National Meteorological Service of Belize

The month of November saw above average rainfall over central portions of the country; while the south and north saw below average, with the north well below. Two rain events, one at the begriming of the month and the other near the end, were primarily responsible for the greater than normal rainfall over central areas. Only one weak cold front crossed the country, and the predominant surface flow was from the northeast. No new temperature record was set.

The month started out with some rain. A surface trof that extended from Belize eastward was the focus for showers and thunderstorms during the first two days, especially in the nights. The moisture was high and the upper pattern diffluent, with an upper anticyclone centered over our area. Belize City received more than four inches of rain on the 2nd, while San Pedro and some central stations got more than two inches. The next three days (3rd,4th,5th) saw a few showers over some areas, as the trof drifted south and dissipated and a moderate northeast surface flow, supported by a ridge over the western Gulf of Mexico, prevailed. The upper pattern was neutral. The moisture decreased and showers were isolated from the 6th to the 8th. A broad low level trof over the central Caribbean Sea resulted in a light northeast airflow over the northwest Caribbean and Belize.

From the 9th to the 12th a few showers developed mainly in a diurnal manner; ie mostly inland during the daytime and over the coast at night. A light north-northeast airflow was supported by a surface trof over the NW Caribbean Sea just east of Belize and a ridge over southern Mexico. Some southern coastal stations recorded one to two inches on the 11th and 12th. A decrease in available moisture resulted in mainly fair weather, with only isolated showers, on the 13th, then a few showers over the south the next day. It was mostly sunny on the 15th with little or no rain. A light northerly airflow prevailed and a weak cold front reached NW Yucatan. The cold front crossed Belize the next day with a few showers and light rain developing mainly over central and southern districts. Rainfall was minimal with this front, and mostly less than one quarter of an inch. The 17th and 18th saw isolated showers mainly over the south, as a northeast airflow prevailed. A broad low pressure area developed over the SW Caribbean Sea east of Nicaragua and high pressures dominated the Gulf of Mexico. The flow backed to the NNE the next two days (19th, 20th) and mainly fair weather prevailed over the mainland, while a few showers developed over the sea. The moisture was relatively low and the upper pattern generally convergent.

Skies became cloudy on the 21st with a few showers and light rain over central and southern areas, as tropical storm Otto formed east of Nicaragua. Otto would remain almost stationary, become a hurricane, then cross over southern Nicaragua on the 24th. Meanwhile, a few showers prevailed over the country through the 24th, except on the 22nd, when showers were isolated. Melinda recorded four and one half inches of rain on the 24th. High pressures dominated the Gulf of Mexico and north-easterlies prevailed over Belize over these days, as another cold front reached northern Yucatan on the 21st, then moved east without crossing Belize. Skies became overcast on Friday 25th with frequent showers and periods of rain over most areas. A moist north-northeasterly airflow, that was convergent over and just east of Belize, prevailed. Rainfall was heaviest along the coast and over the south. Belize City recorded more than four inches of rain for 25th, and some streets were flooded all day. The next day, showers and rain decreased during the morning, to become generally isolated by evening. The moisture decreased and winds became northeast by Sunday 27th and showers remained isolated. The flow then veered to the southeast during the last three days and the moisture decreased, which supported only isolated showers. The surface ridge moved east and out of the Gulf of Mexico, while low pressures developed over the western Gulf and NE Mexico/ Bay of Campeche ahead of a cold front that entered the NW Gulf of Mexico the last day of the month.


#520913 - 01/15/17 11:44 PM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
Posts: 52,953
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Monthly Weather Summary, December 2016

National Meteorological Service of Belize

Climatology shows that the main features influencing weather across the country of Belize in December are cold fronts, upper level troughs and the development of moist northeasterly airflows in the area. There was no frontal passage in December of 2016. However, rainfall was above normal for most areas and this was caused by a rather moist tropical air mass that affected the country. Additionally, an upper level ridge persisted over the southwest Caribbean for a major part of the month. This blocked the fronts from entering the area and also supported instability aloft which resulted in deep convection over the area particularly on the 26th of the month.

On the first day of December a marginally moist and light easterly airflow over the area supported cloudy skies at times with a few showers mainly over northern coastal areas of the country. A slack pressure pattern dominated from the 2nd through to the 3rd and moisture also decreased over the area. This supported mainly fair conditions with only isolated showers across the country. The flow veered even further to the east-southeast on the 4th and 5th supporting mainly fair, warm and mostly dry weather. Similar weather continued on the 6th but isolated showers affected inland areas on that day.

In response to a cold front that descended into the Bay of Campeche on the 7th and later became stationary over extreme northern Yucatan, the surface flow backed to the east on the 7th and then to the east-northeast on the 8th through to the 11th. This resulted in a gradual increase in moisture over the area. While the 7th was still mainly fair with only isolated showers, the 8th became cloudy at times with a few showers across the country and similar weather persisted through to the 11th of the month.

Moisture would increase further on the 12th as a trof developed over the western Caribbean linked to a low pressure system crossing Nicaragua. This resulted in cloudy skies with a few showers and periods of rain. The trof was almost over the country on the 13th causing a moist northeasterly surface flow to develop. Furthermore, the upper levels were quite divergent and this supported cloudy skies with several showers, periods of rain and thunderstorms over the country. This was the first major rainfall event for the month resulting in rainfall totals of over an inch in the Belize City, Ladyville and the San Pedro Area. Conditions continued moist and unstable on the 14th but rainfall occurred mostly in the south that day with Punta Gorda receiving about an inch of rainfall.

Moisture decreased on the 15th and 16th but a few showers still affected southern and central areas of the country. Improvements continued on the 17th as the flow veered more to the east and by the 18th a dry easterly to southeasterly flow supported mainly fair conditions with only isolated showers.

The surface flow shifted abruptly to the east-northeast on the 19th as a cold front entered the central Gulf of Mexico. Additionally, the flow was convergent and gusty over the area. This factor coupled with an increase in moisture supported cloudy skies at times with a few showers across the country on the 19th and 20th of the month. Additionally, a broad trof developed over the northwest Caribbean on the 20th and persisted through to the 21st. Therefore, the gusty northeasterly flow persisted but showers decreased on the 21st. By the 22nd conditions were mainly fair with only isolated showers. Conditions continued relatively dry over the area on the 23rd but moisture increased later in the night resulting in an increase in showers.

Conditions were relatively moist on the 24th and 25th resulting in cloudy skies at times with a few showers. These occurred mostly in the south on Christmas Day. Weather conditions deteriorated further on the 26th as an upper ridge east of the area coupled with trofing to the west supported a divergent and moist South-Southwesterly flow aloft. Skies were cloudy to overcast that day with some showers, thunderstorms and periods of rain over most areas. This was the second major rainfall event for the month. Belmopan in the west and Kendall in the south recorded almost an inch and a half of rainfall.

Relatively moist conditions persisted over the area from the 27th through to the 29th although the upper levels had become less divergent. The result was cloudy skies at times with a few showers mainly over central and southern areas. Moisture decreased further on the 30th and 31st resulting in partly cloudy skies with shower activity becoming generally isolated.

The graph and maps below show the rainfall recorded in December 2016 versus the climatological mean for the month for a few of the weather stations across the country. These graphics show most stations recorded above average rainfall except for those in the western Cayo District that recorded below average.





#521447 - 02/07/17 11:44 PM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
Posts: 52,953
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Monthly Weather Summary, January 2017

National Meteorological Service of Belize

January 2017 started out with beautiful weather. For the first three days, a dry south-easterly flow prevaile, which supported little or no rainfall. On the fourth day, only isolated showers were observed, followed by the fifth and sixth, experiencing fair conditions.

On the seventh, the country experienced pre-frontal activity. Showers and thundershowers were observed, followed by the passage of a cold front.  The eight day met dry and gusty conditions. Wind speeds ranged between fifteen and thirty knots.  On the ninth, wind speeds abated, but dry conditions continued. However, a few showers were observed around the country during the night.

From the tenth through to the seventeenth, a series of high pressure ridges traversed the Gulf of Mexico and the Northwest Caribbean Sea.  These supported and maintained a relatively moist north-easterly flow across Belize. The country experienced light showers each and every day during this period.

Conditions changed with the onset of a dry east to south-easterly flow from the eighteenth to the twenty-first. Once again, fair conditions prevailed with little or no rainfall.

On the twenty-second night, another cold front crossed the country. This time, pre-frontal activity was minimal. Only the Corozal District experienced light isolated showers.

From the twenty-third to the twenty-seventh, fair, cool and dry conditions prevailed. The twenty-eight was met with isolated showers , followed by a few showers on the twenty-ninth, with the passage of a third cold front. The thirtieth was dry and windy, while the last day was cool and dry.

In conclusion, observation showed three cold fronts crossed Belize during January, 2017. Only the first was accompanied by a few thundershowers. Rainfall data collected indicated that rainfall for this month  was below normal. 


Station Total January 2017 Normal
Libertad 47.3    59.4
Towerhill 35.4    72.4
Airport 71.7    98.3
Belmopan 82.8    125
Central Farm 87.7    115.6
Spanish Lookout 54.6    93.4
Melinda 120.4 157.9
Pomona 70.9 162.7
Savannah    119.7 135.7

#522422 - 03/20/17 04:30 AM Re: Monthly Weather Summary [Re: Marty]  
Joined: Oct 1999
Posts: 52,953
Marty Offline
Marty  Offline

Monthly Weather Summary, February 2017

National Meteorological Service of Belize

February 1st 2017 saw a light easterly surface flow prevailing, while at upper levels a trough east of our area supported a convergent / subsident northwesterly flow over our area. Mostly cloudy skies prevailed with little or no rainfall over the mainland, while a few showers over central coastal waters early, drifted on-shore with a few more developing inland during the afternoon and and over-night into the 2nd. Light winds supported some coastal convergence and isolated early morning showers into the 3rd. During the next few days through 13th an east-northeasterly flow supported low level moisture through the lower 10,000ft and night-time / early-morning showers occurred over the south and some central areas of the country.

Mainly fair, warm and dry weather prevailed during Tuesday 14th through Monday 20th as the upper level pattern continued convergent / subsident and a light to moderate east-southeasterly surface / low level flow developed. During the 15th and 16th a frontal boundary was positioned over the Bay of Campeche and a pre-frontal shear-line drifted across Yucatan - Guatemala and northern Belize over-night but supported only isolated showers in the northwesterly flow along with isolated afternoon showers resulting from day-time heating over the Maya Mountains. The shear-line rapidly weakened as it retrogress over the area with the southeasterly flow returning. Upper level moisture increased during Friday 17th as a trough moved nearer our area, while a cold front stalled across central Yucatan then retrogressed and dissipated while the east-southeasterly surface / low level flow continued to dominate.

By the 20th a deep layer trough to the west and northwest supported rapid deepening of a surface low over Texas / Louisiana. the low ejected across he southeastern United States with the associated cold front swinging east and sotheast to Yucatan by the 22nd, while a pre-frontal triough drifted over our area and into the northwestern caribbean sea. The relatively weak frontal boundary would eventually drift over the extreme Northwest Caribbean by Wednesday 22nd, while the associated shear-line continued southeast to southern Costa Rica / Panama. Few showers affected the south during the afternoon / evening of the Tuesday 21st and the northern / central areas through early night-time. A few more showers developed over the northern districts over-night into the 22nd and drifted eastwards to coastal waters by day break. early morning temperatures were slightly cooler where as relatively warm daytime temperatures occurred during Wednesday 22nd through Friday 24th.

An east-southeasterly airflow supported mainly fair weather during 23rd and 24th with isolated afternoon thunderstorms developing over the Maya Moutains during the 25th. By the 26th broad troughing developed over the Northwest Caribbean and supported an east-northeasterly flow. The trough sheared northwestward across Yucatan and the flow veered to the southeast by the 26th with insignificant increase in moisture and shower activity. Mainly fair weather continued during Monday 27th and Tuesday 28th.


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