Update: As of the 8pm Advisory by the National Hurricane Center on Sep. 3, 2017, a Hurricane Watch is in effect for St Maarten as well as Antigua, Barbuda, Anguilla, Montserrat, St. Kitts, and Nevis, Saba, St. Eustatius and St. Barts. Hurricane conditions are possible within the watch area by Tuesday night, with tropical storm conditions possible by late Tuesday.
As of the 11am Advisory by the National Hurricane Center, the center of Hurricane Irma was located near latitude 17.7 North, longitude 48.4 West. Irma is moving toward the west-southwest near 14 mph (22 km/h) and this course at a slightly slower forward speed is expected through tonight. A turn toward the west is forecast on Monday.
Maximum sustained winds are near 115 mph (185 km/h) with higher gusts. Irma is a category 3 hurricane on the Saffir-Simpson Hurricane Wind Scale. Some strengthening is forecast during thenext 48 hours.
Hurricane-force winds extend outward up to 25 miles (35 km) from the center and tropical-storm-force winds extend outward up to 80 miles (130 km). The estimated minimum central pressure is 969 mb (28.62 inches).
Hurricane and Tropical Storm Watches will likely be required for the Leeward Islands (including St Maarten) later today or tonight. The next complete advisory will be available at 5 PM AST.