Weather analysis as of late this afternoon indicated that there are no areas of concern in terms of tropical development across the Atlantic, Caribbean and the Gulf. Extremely strong wind shear values can be found across the entire Gulf, much of the Atlantic and the eastern and central Caribbean. These very strong wind shear values are highly unfavorable for any sort of tropical development. One area of lower wind shear of 10 to 20 knots can be found across the southwestern Caribbean. Even so, there lacks any sort of deep convection across the southwestern Caribbean and because of this, tropical development is not expected there, even though the environmental conditions are favorable.
Tropical Development Remains A Possibility Between June 7 & June 14 From The Northwestern Caribbean Into The Gulf: It still appears that the rest of this month should be quiet in terms of tropical development chances as the overall environment looks unfavorable for tropical development.
Beyond this, it continues to look possible that an upward motion pulse of the Madden Julian Oscillation will push through the Caribbean and the Atlantic beginning the last part of the first week of June. This upward motion pulse of the Madden Julian Oscillation looks to reach its peak across the Caribbean and the Atlantic between June 7 and June 12.
This upward motion pulse of the Madden Julian Oscillation will inject moisture and energy into the atmosphere across the Caribbean, the Gulf and the Atlantic leading to a favorable background state fro tropical development.
Looking at the latest weather forecast guidance for early June shows no real outright signs of tropical development from either the GFS or the European models. Of course both models only go out to about June 5, which is just before when things begin to become favorable for tropical development.
As for the ensemble model guidance, the GFS ensemble model guidance does show some members forecasting tropical development to occur during the first week of June in the northwestern Caribbean. I do think that we’re seeing the typical model bias & that the better chances probably will wait until just after June 7.
The European ensemble model guidance does show some hints at tropical development in the northwestern Caribbean around June 4-5 with a couple of members pointing to that possibility.
The longer range European ensemble model guidance shows some pretty decent hints at tropical activity in the northwestern Caribbean with whatever forms moving into the Gulf between June 7 and June 14. In fact, the latest CFS model backs this up and shows a tropical system taking shape over the northwestern Caribbean as late as June 15 and taking a track through the Gulf on June 16 and 17 before making landfall along the central Gulf Coast on June 18.
Here Are My Thoughts As Of Wednesday Evening: Given everything that I have looked at, including the favorable look in terms of environmental conditions over the Caribbean and the Gulf after June 7 and also the first hints from the models showing tropical development in the northwestern Caribbean between June 7 and 14, I do think that the prospects of tropical development in the northwestern Caribbean is something that’ll need to be watched closely starting during the weekend of June 7-8 and continuing through the week of June 9.
While this is something that will certainly need to be watched closely once we get into early June, it’s nothing to be overly worried or concerned about, for now.
The next tropical weather discussion will be issued on Monday.