In the previous long post, I meditation that it appeared there may be a low-level circulation forming in 99L just northeast of Puerto Rico. Here is a visible satellite loop which seems to show the closed circulation, well out ahead of all of its major thunderstorms. At the very end we may have a hint of some storms blossoming around the curl. Time will tell.
Here is the full loop:http://www.ssd.noaa.gov/PS/TROP/floaters/99L/html5-vis-short.html