Tropical Storm Rafael is passing south of western Jamaica and is forecast to strengthen into a hurricane possibly by Tuesday evening.Rafael, which formed Sunday and was previously known as Potential Tropical Cyclone 18,

Tropical Storm Rafael is intensifying as it moves toward the Cayman Islands and western Cuba. It will likely enter the Gulf of Mexico as a hurricane - here's what you need to know.

Tropical Storm Rafael is expected to strengthen into a hurricane before making landfall in Cuba Wednesday, according to the National Hurricane Center.