Much of Florida's western coast was under a tropical storm warning, with the threat of heavy rains and high wind moving quickly northeast from the Gulf of Mexico.
It is the latest in a series of severe whether events across the country, from record-breaking heat in the West, flooding in Texas and storms that are expected to cause problems in the nation's capital and mid-Atlantic region.
The National Hurricane Centre in Miami said a tropical depression in the southern gulf was expected to become a tropical storm before hitting the Florida Gulf coast today afternoon. The depression was moving at a speed of about 19 kph and was expected to pick up the pace later yesterday.
"It's going to impact most of the state in some way," Governor Rick Scott said in a phone interview. "Hopefully we won't have any significant issues here, but we can have some storm surge, some rain, tornados and some flooding."
Scott postponed a political meeting with presumptive Republican presidential nominee Donald Trump scheduled today in New York so he can remain in the state capital to monitor the weather.
Tropical depressions have wind speeds of less than 63 kph, while tropical storms carry wind speeds of between 63 kph and 117 kph.
What was expected to become Tropical Storm Colin was likely to bring dangerous rainfall levels, and residents were warned about possible flooding and hazardous driving conditions. Rain began falling in the Tampa Bay area just past noon yesterday.
Scott warned residents not to simply look at the centre of the storm, saying the heaviest rain will be to the east and west of it.
The National Weather Service in Mobile issued a flood warning for the Shoal River near Crestview and warned of possible widespread flooding in streams, creeks, and canals. Wind gusts threatened to bring down trees and branches and cause power outages.
The Georgia coast and the north Florida Atlantic coast were placed under a tropical storm watch yesterday evening. Sand bags were being distributed to residents in St. Petersburg, Tampa and nearby cities.
"We're surrounded on three sides by water," said Pinellas County spokesman Nick Zoller, who said the county distributed 3,300 sand bags on Saturday, a number he expected to go up now that a tropical storm warning is in effect.
Just to the north, Pasco County Emergency Services Director Kevin Guthrie said the message is to be prepared. "We are going to flood in parts of Pasco County," Guthrie said in an email.
