
The warning from Longboat Key near Sarasota to the Ochlockonee River south of Tallahassee means Tropical Storm Alberto was expected to produce hurricane conditions within the next 24 hours.
A tropical storm warning remains in effect for Longboat Key to Englewood.
At 11 a.m., Alberto's winds had increased to 70 mph, up from 50 mph just three hours earlier. The storm was centered about 190 miles south-southwest of Apalachicola and was moving north-northeast at about 7 mph, National Hurricane Center forecasters said.