UPDATE 2:01PM EDT: The latest advisory from the National Hurricane Center updates Hurricane Dean to Category THREE with winds of 125 mph and notes a continued pressure drop to 961 mb. Additionally, Dean is looking much stronger and has a better defined eye as can be seen in the below images. I expect he will shape up and begin to look more his strength soon with a well-defined eye and gain nicer outflow.
Hurricane Dean had been stalling his intensification for almost 24 hours, hovering between 970mb and 979mb of central pressure but has now broken away from the dry air that was inhibiting his growth. The latest USAF Hurricane Hunter to fly through Dean noted central pressure of 964mb and an increased wind speed to 105mph making Hurricane Dean a Category 2 Hurricane.
If, as currently indicated, Dean tracks directly over Jamaica, we will have to reevaluate everything. Jamaica has quite large mountains in the center of the island and Hurricanes do very poorly when passing over high elevations. Jamaica could do quite a number on our storm and knock his strength down significantly with the right conditions.
The intensity models (which are notoriously inaccurate) are almost uniformly calling for extreme intensification into a Major hurricane, possibly a category 4, but are slightly less aggressive than earlier today and yesterday. It is important to note that intensity forecasting is not very well understood and we can only look at what data we have to make a judgement.
Tropical Storm Warnings and Hurricane Watches are up for most of Hispaniola, Puerto Rico and much of the eastern Caribbean, but look for those easternmost warnings to be dropped soon as Dean continues his trek westward at the speedy clip of 21mph.
As always, you can get the latest model runs from the Dean Charts Page or our general Charts Page and keep checking TheStormTrack.com or subscribe to our RSS feed or Twitter feed for the latest Dean updates.