The National Hurricane Center is tracking Invest99L as it moves over the central Caribbean Sea and gives the tropical rainstorm a 90% chance of developing into a tropical depression in the next two days.

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.

A new storm could hit Florida by the middle of next week as ... The Gulf Coast has already had five hurricane landfalls this hurricane season. National Hurricane Center forecasters say the storm is now "Potential Tropical Cyclone 18," a tropical wave ...