Hurricane Tammy has become better organized with max winds now at 65 kts as it moves WNW at 6 kts with max significant wave heights estimated to 7.5 meters (25 feet). Tammy is forecast to turn NW later today and bring the center near or over portions of the Leeward Islands tonight and Saturday. Once Tammy moves north of the Leeward Islands, the storm is forecast to turn northward and then begin to recurve towards the northeast in 4 and 5 days.
Tammy should strengthen for another 36-48 hours, peaking at 75-85 kts but as the center moves north of the Leeward Islands, increasing vertical wind shear is likely to limit intensification.
Hurricane conditions are expected in portions of the Leeward Islands by late tonight or Saturday morning. Heavy rains from Tammy will begin to affect the Leeward and northern Windward Islands later today and into Saturday morning, spreading into the British and U.S. Virgin Islands and Puerto Rico as early as Sunday.