The National Hurricane Center said Hurricane Rafael formed Tuesday evening on its way toward Cuba and the Gulf of Mexico while tropical storm warnings were issued for the Florida Keys.

MIAMI - The lower and middle Florida Keys are now under a tropical storm warning as Tropical Storm Rafael is forecast to grow steadily as it churns past Jamaica's west coast on a path for Cuba, where it's expected to arrive later in the week as a hurricane.

Tropical Storm Rafael has begun to strengthen in the Caribbean Sea, and it is expected to reach hurricane strength by Wednesday and bring destructive winds and heavy rainfall to the region. Rafael was approximately 105 miles south-southwest of Kingston,

Tropical Storm Rafael has strengthened into a Category 1 hurricane as it swirled past Jamaica and chugged toward western Cuba.

Tropical Storm Rafael was rapidly picking up steam on Tuesday afternoon as it chugged toward the Cayman Islands in the Caribbean, and will likely become a hurricane in the next few hours, according to the U.