There are increasing rain showers around, generally moving down from the NNE
I said yesterday I could feel rain coming, it did happen, but only a small area near us.Monthly Weather Summary, January 2019
National Meteorological Service of Belize
September is typically a wet month for the country of Belize. It also coincides with the peak of the Atlantic Basin Hurricane Season and a significant amount of the historical tropical cyclones that have affected the country occurred during the month of September. Apart from tropical cyclones, other systems that typically affect Belize during the month of September include tropical waves, Tropical Upper Troposheric Troughs (TUTTs) and at times cold fronts and frontal shear lines affect the country as early as September.
September 2019 was drier than normal for most of the country. Driest conditions were experienced over central and southern coastal areas. The north was just a bit drier than normal. The month started off slightly moist with a few showers and isolated thunderstorms affecting mostly inland areas on the first two days. The main synoptic feature at the surface was powerful Hurricane Dorian northeast of the area near the Bahamas. This created a very slack pressure pattern over our area with light and variable winds. A weak tropical wave crossed late during the night of the 1st through early morning of the 2nd.
Conditions became drier from the 3rd and 4th. Showers and thunderstorms were generally isolated during this period with slightly more affecting the southern districts during the nighttime. Another increase in moisture followed the passage of a tropical wave on the 5th. However, showers and thunderstorms were confined mostly to the south that day. Showers and thunderstorms increased later on the night of the 5th through to the 6th with activity spreading to other areas of the country.
The 7th and 8th saw a diurnal pattern of overnight showers and thunderstorms in the south, spreading to other areas in the early morning and becoming isolated by afternoon. Moisture increased over the area on the 9th with the approach of the third tropical wave for the month. The tropical wave crossed late in the evening supporting a few showers mostly over central, southern and inland areas of the country. Conditions continued relatively moist during the following two days (10th and 11th). This moisture along with relatively divergent conditions at the upper levels continued to support the development of a few showers and thunderstorms across the country. Punta Gorda recorded a total of 116 mm of rainfall on the 10th.
The fourth tropical wave to cross the country in September 2019 did so around midday on the 12th. This wave arrived under favorable upper level dynamics and aided the development of a few showers and thunderstorms mostly over northern areas of the country. Libertad recorded 27.8 mm of rainfall that day. The 13th continued relatively moist with some showers and thunderstorms affecting most areas of the country. Although, the 5th tropical wave for the month crossed on the 14th showers and thunderstorms that day were not as widespread as on the previous day.
Moisture decreased further over the area on the 15th. A few showers and thunderstorms over southern and central portions of the mainland in the morning became generally isolated after mid-afternoon. Generally fair condition continued across the country from the 16th through to the 19th. Showers were generally isolated with a few more along with isolated thunderstorms at times over the Toledo district.
The passage of the 6th tropical wave for the month on the 20th saw an increase in moisture across the country. This supported the development of a few showers and isolated thunderstorms during the morning hours that decreased after mid-afternoon. The National Hurricane Center's analysis suggests that a 7th wave crossed on the 21st. However, this system was weak and only supported a few showers and isolated thunderstorms over the Maya Mountains and only isolated showers elsewhere.
A very slack pressure pattern dominated across the area from the 22nd through to the 26th. Additionally, conditions were relatively moist during the period. Rainfall records suggests that most rainfall activity occurred over northern and inland areas during this period. Libertad in the Corozal district recorded 68.8 mm of rainfall on the 25th while Belmopan recorded 30.1 mm that same day.
The last few days of the month continued slightly moist with weakly divergent conditions at the upper levels. This supported some instability over the area. Showers and thunderstorms occurred mostly during the late evening to nighttime hours during this period.
In summary, although the month of September 2019 saw relatively moist atmospheric conditions for quite a few days, this did not translate to substantial amounts of rainfall. On the contrary, most areas of the country experienced below normal rainfall. The graph and maps below summarize the total rainfall and average maximum and minimum temperature recorded during the month of September 2019. They also give an indication of how these readings compare to the normal for the month across the stations sampled. As can be seen, rainfall was below normal for most of the country. However, the extreme north (Libertad) was only slightly below normal compared to other areas. In terms of maximum temperatures most of the stations sampled here reported higher than average maximum / daytime temperatures except for the Belize Zoo. A similar situation can be said for minimum/nighttime temperatures where all the stations except for Central Farm reported temperatures warmer than usual during the nighttime.Monthly Rainfall SummaryMonthly Maximum TemperaturesMonthly Minimum TemperaturesRainfall Observed: January 2019 (mm)Rainfall Observed: January 2019 (% Above/Below Average)