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

The National Hurricane Center began advisories Wednesday on a system it forecasts to become the season’s next tropical depression or storm. Long-range forecast models predict it will intensify into a hurricane and threaten Florida by the middle of next week.

Forecasters say there's a 80% chance Invest 97L will develop in the next two days over the Caribbean Sea. Will it be Tropical Storm Raphael?