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,

Tropical Storm Sara has formed in the Caribbean Sea and is forecast to continue strengthening, according to the National Hurricane Center.

Tropical Storm Sara formed in the Caribbean Sea on Thursday, but the National Hurricane Center says there's a chance it won't reach hurricane strength.