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.

The National Hurricane Center has designated an area of low pressure in the Caribbean as “Potential Tropical Cyclone Nineteen,” and forecasts it will strengthen into a tropical storm within the next 24 hours.