Try to look at a water vapor sattelite loop as you read the discussion and then you'll see the features discussed there...basicaly there is what is called "troughiness" in the vernacular across the SE GOM SW ATL and the Cuba/ Yucatan regions. There is a weak surface feature on the N coast of Yucatan, but no upper support due to the dry air in the upper feature it is associated with (TUTT). It will move toward the Bahamas. As it does so the big upper low now dropping off the SE coastline will continue toward the Bahamas. This upper low was responsible for the unstable air that spawned some severe weather in peniinsula Florida yesterday in the wake of a weak back door wind shift line and the infusion of cold dry air into the upper atmosphere. All this is expected to vascilate back and forth over the next several days which would allow for thunderstorms to increase in Florida, as indeed they are predicted to do (40-50% probabilities).
At least that is how I read it and see it in the WV loops.