Tropical Storm Isaias is dumping heavy rain on parts of the Caribbean and could bring tropical-storm-force winds to Florida's East Coast beginning Saturday.

A tropical storm watch has been issued for a portion of Florida's East Coast from the Upper Florida Keys to Sebastian Inlet, Florida. This includes Miami, Ft. Lauderdale and West Palm Beach.

For the latest on Isaias, along with a discussion of its remaining forecast uncertainties, .

The Weather Company’s primary journalistic mission is to report on breaking weather news, the environment and the importance of science to our lives. This story does not necessarily represent the position of our parent company, .