Lots of factors in play but Tropical Storm Sara is expected to form this week and could become a major hurricane threatening the US next week.

AccuWeather published an early Hurricane Sara timeline that shows the storm could make landfall in South Florida by Wednesday. "Wind shear remains low over much of the Caribbean, and waters are plenty warm (in the 80s F),

Forecasters at the National Hurricane Center are urging residents of the eastern Gulf Coast, particularly Floridians, to monitor the forecast closely because there could be an opening for the storm to reach the US next week.