Hey Pedro,
You've got a lot more to look at than just what shows up to the naked eye. It's there, why not use it?
http://fksa.org/showthread.php?t=6733
I would take a good look at the NWS higher res. radar. Doesn't look encouraging to me right now. The Keys are being hit with outflow bands from Hurricane Gustav just to the south. If there are large enough holes it might work, looking at things from way up here it looks iffy, perhaps even less encouraging, even for well experienced kiters.