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

A broad area of low pressure in the western Caribbean Sea is becoming better organized and the National Hurricane Center is initiating advisories on the system as of 4 p.m. Sunday.

A hurricane warning is in effect for the Cayman Islands and the Cuban provinces of Pinar del Rio, Artemisa, La Habana, Mayabeque, Matanzas and the Isle of Youth.