There is clearly a break in the ridge of high pressure in the Allantic,this is what the latest model runs including the GFS model is picking up on.This puts SE Florida back into play in a real way.
My concern,IF he slows way down or even stalls after exiting Cuba it could POSSIBLE rapidly intensity.Also people in South Florida will not have much time to prepare,also we could also be getting some affects from Issac as it comes off the coast of Cuba so driving conditions could become hazardous as early as Sunday morning.
I expect the NHC track to shift east as time goes forward.

2pm update. Pressure is down to 997 MB,no change in track YET.