Former Tropical Depression Eighteen strengthened to Tropical Storm Rafael south of Jamaica on Monday afternoon. At 4:00 p.m. EST on Monday the center of Tropical Storm Rafael was located at latitude 15.5°N and longitude 76.7°W which put the center about 175 miles (280 km) south of Kingston, Jamaica. Rafael was moving toward the north at 9 m.p.h. (15 km/h). The maximum sustained wind speed was 45 m.p.h. (75 km/h) and there were wind gusts to 60 m.p.h. (95 km/h). The minimum surface pressure was 997 mb.
A Hurricane Warning was in effect for Grand Cayman, Little Cayman, and Cayman Brac,
A Tropical Storm Warning was in effect for Jamaica.
A Hurricane Watch was in effect for the Cuban provinces of Pinar del Rio, Artemisa, La Habana, Mayabeque, Matanzas, and the Isle of Youth.
A Tropical Storm Watch was in effect for the Florida Keys from Key West to Channel 5 Bridge. A Tropical Storm Watch was in effect for the Dry Tortugas. A Tropical Storm Watch was in effect for the Cuban provinces of Villa Clara, Cienfuegos, Sancti Spiritis, Ciego de Avila, Camaguey and Las Tunas.
Former Tropical Depression Eighteen strengthened on Monday afternoon and the U.S. National Hurricane Center designated the system as Tropical Storm Rafael. The circulation around Tropical Storm Rafael was organizing rapidly. The inner end of a rainband wrapped around the center of Rafael’s circulation. More thunderstorms formed near the center of circulation. More thunderstorms also developed in bands revolving around the center of Tropical Storm Rafael. Storms near the center of Rafael generated upper level divergence that pumped mass away fro the tropical storm. The removal of mass caused the surface pressure to decrease.
Tropical Storm Rafael will move through an environment favorable for intensification during the next 24 hours. Rafael will move over water where the Sea Surface Temperatures are near 29°C. It will move under the middle of an upper level ridge over the Caribbean Sea. The upper level winds are weak near the middle of the ridge and there will be little vertical wind shear. Tropical Storm Rafael will intensify during the next 24 hours. Rafael could intensify rapidly at times. Tropical Storm Rafael is likely to strengthen to a hurricane on Tuesday.
Tropical Storm Rafael will move around the southwestern part of a high pressure system over the western Atlantic Ocean. The high pressure system will steer Rafael toward the northwest during the next 24 hours. On its anticipated track, the center of Tropical Rafael will pass near Jamaica on Monday night. Rafael will reach the Cayman Islands by Tuesday night. Rafael is likely to reach western Cuba by Wednesday afternoon.
Tropical Storm Rafael will bring strong winds and heavy rain Jamaica. Heavy rain is likely to cause floods in some locations. Rafael is likely to be a hurricane when it moves over the Cayman Islands. Rafael will bring strong winds and heavy rain to the Cayman Islands. It could also cause a storm surge of up to 7 feet (2 meters) in the Cayman Islands.