The Atlantic hurricane season ends on Nov. 30. But tropical storms can form any time, and the sea water has been staying warmer for longer.

The National Hurricane Center is reporting a high chance of a tropical depression forming over the next 48 hours, tracking across the Caribbean Sea. All eyes are on the Caribbean, where a developing tropical depression could potentially turn into the next hurricane to hit Florida,

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.

Lots of factors in play but Tropical Storm Sara is expected to form this week and could become a major hurricane threatening the US next week.