When a tropical system stalls, the threat of flooding from rainfall increases dramatically. Flooding has already been widespread over parts of the "Sunshine State." There will likely be much more flooding with an additional 5 to 10 inches of rain forecast for northern portions the Florida peninsula. Some areas could see up to 15 inches!

As an often used rule of thumb... you can approximate the potential amount of rain from a tropical system (in inches) by dividing 100 by the forward motion of the system in miles per hour.

Example #1: If Fay moves NW at 5 mph... 100/5= 20 inches

Example #2: If Fay moves NW at 10 mph... 100/10= 10 inches

Example #3: If Fay moves NW at 20 mph... 100/20= 5 inches

Obviously slow movevment means a lot more rain. This storm needs to get on its way!

The other concern is the potential for this to cross Florida and then move over the northern Gulf of Mexico. If the southward trend in the forecast track for Fay continues, it could become a hurricane and that could be bad for the Gulf coast.

Right now the forecast keeps Fay over land. We'll keep you posted.