Tropical Storm Isaac has weakened slightly this morning. The storm is about 225 miles south-southeast of San Juan, Puerto Rico and about 1,600 miles south-southeast of Macon. It is moving west at 13 mph, and a turn to the west-northwest is forecast. Isaac should pass near or south of Puerto Rico today and approach the Dominican Republic and Haiti tonight and Friday.
Maximum sustained winds remain at 40 mph. Tropical storm force winds extend outward up to 140 miles from Isaac’s center. Some strengthening is forecast over the next 48 hours, and Isaac could become a hurricane before reaching Hispaniola (Domican Republic and Haiti).
A hurricane warning is in effect for Haiti and the south coast of the Dominican Republic from the border with Haiti eastward to Isla Saona. The warning means that hurricane conditions are expected within the next 24-36 hours.
A tropical storm warning is in effect for the British Virgin Islands, Puerto Rico, Vieques, Culebra, the US Virgin Islands, and the north coast of the Dominican Republic from the border with Haiti eastward to Isla Saona. The warning means that tropical storm conditions are expected within the next 36 hours.
A tropical storm watch is in effect for the southeastern Bahamas including the Aclins, Crooked Island, Long Cay, the Inaguas, the Ragged Islands, and Turks and Caicos Islands. The watch means that tropical storm conditions are possible within the watch area during the next 24-48 hours.
Rain totals of 4-8″ are possible over the northern Windward Islands and the Leeward Islands as well as Puerto Rico and the Virgin Islands. Higher totals are expected for Hispaniola (Haiti and the Dominican Republic). Isolated spots there could see as much as 20 inches. These rains could cause dangerous flash floods and mud slides.
Tropical Depression 10 continues moving west-northwest in the eastern Atlantic. That storm is about 2,800 miles southeast of Macon. TD 10 is moving west-northwest at 16 mph, and that motion should continue.
Sustained winds are at 35 mph, and some strengthening is forecast. The depression is forecast to become a tropical storm (Joyce) later today or Friday.
There are no watches/warnings associated with Tropical Depression 10.