Visible satellite image of Tropical Storm Isaac in the Caribbean from this morning. (NOAA/NESDIS)

The Capital Weather Gang informs us:

Regardless of what exact intensity the storm is, there are dangers associated with any tropical cyclone. The primary one for now is rain, and the associated flooding, mudslides, etc. Much of southern Florida could receive 6-9” in the next few days, with locally higher amounts.

Tampa has a 31 percent chance of experiencing tropical storm force winds, as of this morning's advisory, but only a 1 percent chance of hurricane force winds. 

The storm is headed toward Haiti right now, where a spokesman for the Hurricane Center in Miami said rain will cause "life-threatening flash floods and mudslides.”