In a worst-case scenario for the U.S., a major hurricane could hit Florida's Gulf coast, but forecasters say it would have to clear several hurdles.

Tropical Storm Sara is expected to form in the western Caribbean and still has a chance of taking a turn to the northeast toward Florida, the National Hurricane Center said. Here’s the

Tropical Depression Nineteen formed Thursday morning and is expected to become tropical Storm Sara later today, the NHC said.