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#532488 09/26/18 06:45 AM
Joined: Oct 1999
Posts: 84,400
Marty Offline OP
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[Linked Image] Infrared satellite imagery during the past several hours indicates that deep convection has increased and become better organized near the center of the remnants of Kirk.

At 800 AM AST (1200 UTC), the center of Tropical Storm Kirk was located near latitude 12.0 North, longitude 53.5 West. Kirk is moving toward the west near 18 mph (30 km/h). A westward to west-northwestward motion is expected through Friday night. On the forecast track, Kirk is expected to approach Barbados and the northern Windward Islands Thursday afternoon and move into the eastern Caribbean Sea by Friday morning. Maximum sustained winds are near 45 mph (75 km/h) with higher gusts. Little change in strength is forecast until Kirk moves through the central Lesser Antilles Thursday afternoon and evening.

Rapid weakening is expected on Friday after Kirk moves over the eastern Caribbean Sea.

For more information, check the daily Tropical Weather Outlook, click here

Joined: Oct 1999
Posts: 84,400
Marty Offline OP
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[Linked Image]

It is expected that even though Kirk will likely dissipate in the eastern Caribbean late this week due to very strong wind shear, we are going to have to keep a very close eye on its remnants when it reaches the western Caribbean next week.

Even though the longer range model guidance agree that western or central Caribbean tropical development is a possibility later next week, they cannot agree as to how this may occur. The GFS model points to a scenario of some of the energy from Kirk combining with energy from the eastern Pacific to produce a tropical storm in the central Caribbean late next week and next weekend.

The Canadian model forecasts Kirk to remain a tropical storm all the way across the Caribbean with impacts to Jamaica on Sunday, the Cayman Islands on Monday and the northeastern Yucatan Peninsula on Tuesday.

The European model forecasts dissipation in the eastern Caribbean around Friday and Saturday with some of the energy consolidating in the southwestern Caribbean early next week. By late next week, the European model forecasts some development just south of Jamaica.

The European ensemble guidance shows a large amount of its members forecasting Kirk to move into the southwestern Caribbean later next week. Beyond that, the ensemble members are split with some forecasting a northward track towards the Bahamas next weekend and others forecasting a track towards the Bay of Campeche.

Here Are My Thoughts: I think that there is enough evidence in the data that suggests Kirk or the remnants of Kirk may make it into the western Caribbean during the late part of next week. One thing that is for sure is that Kirk has been a fighter and I have concerns that it could be a western and possibly central Caribbean problem late next week. Where it goes after that remains to be seen, but the long range ensemble guidance suggests the southern US high pressure ridge may back off to the west allowing for any tropical system to head northward out of the Caribbean. With that said, it should be noted that all of the guidance have been under forecasting the strength of the upper level ridge in their long range forecasts and we may end up seeing a stronger upper level ridge in the end. What this means is that the northward track forecast by some of the guidance may be wrong and we may end up with a system that tracks westward towards the Bay of Campeche instead of northward towards Florida and the Bahamas.

Bottom line is that I really do think that the western Caribbean will be a spot to watch very closely for potential tropical development late next week, however, it is way too early to say where exactly any system may go.

Crown Weather Services

[Linked Image]

Joined: Oct 1999
Posts: 84,400
Marty Offline OP
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Kirk has degenerated into an open tropical wave in the eastern Caribbean as strong westerly wind shear has ripped the storm apart and robbed it from an organized low-level center of circulation. The tropical wave will continue to move westward across the Caribbean over the next few days, eventually moving into Central America by the middle of next week. Some locally heavy downpours can occur this weekend across Puerto Rico, the Virgin Islands and Hispaniola due to the tropical wave that was once Kirk.


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