A late-season tropical system swirling over the Caribbean Sea has become better organized and strengthened into Tropical Storm Sara on Thursday, and forecasters fear that the storm could unleash life-threatening and potentially catastrophic impacts in Central America,

A somewhat rare November storm system is gathering steam in the Caribbean Sea. Tropical Storm Sara will eventually make a turn to the east and 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.