A storm south of Cuba was getting organized as it aimed for Florida’s west coast and the Gulf of Mexico, with federal forecasters saying it’s likely to become a tropical storm by late Saturday.

Until then, the front is being called Tropical Depression Four, with the name Debby available should it graduate to tropical storm.

Maximum sustained winds of 30 mph kept it below the 39 mph threshold for tropical storm status late Friday, but the National Hurricane Center said it would continue to…