000 FZNT31 KNHC 041455 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1055 AM EDT Mon Sep 4 2017 Marine Weather HF Voice Broadcast for the Tropical N Atlantic from 07N to 22N between 55W and 64W, the SW N Atlantic S of 31N W of 65W including Bahamas, and the Caribbean Sea. Seas given as significant wave height, which is the average height of the highest 1/3 of the waves. Individual waves may be more than twice the significant wave height. Synopsis for Caribbean Sea and Tropical N ATLC from 07N to 19N between 55W and 64W .SYNOPSIS...Hurricane Irma at 16.8N 53.3W 944 mb at 11 AM moving WSW at 12 kt with maximum sustained winds 105 kt gusts to 130 kt. Irma will intensify to 115 kt gusts to 140 kt near 16.5N 54.8W at 8 PM tonight, intensify to 120 kt gusts to 145 kt near 16.7N 57.1W at 8 AM Tue, intensify to 125 kt gusts to 150 kt near 18.2N 62.4W at 8 AM Wed, reach near 19.9N 68.0W at 8 AM Thu, reach near 21.2N 73.3W at 8 AM on Fri and near 22.0N 77.8W at 8 AM on Sat. Large E swells will reach the NE passages this evening. Tropical storm force and greater conditions will reach the vicinity of the northern Leewards on Tue afternoon and vicinity of the Virgin Islands early Wed. NW Caribbean W of 85W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 ft. .TONIGHT...E winds less than 10 kt. Seas 3 ft. .TUE...E winds less than 10 kt. Seas 2 ft or less. .TUE NIGHT...E winds 10 to 15 kt. Seas 2 ft or less. .WED...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 2 ft or less. .WED NIGHT...E winds 10 to 15 kt. Seas 2 ft or less. .THU...E winds 10 to 15 kt. Seas 2 ft or less. .THU NIGHT...NE winds less than 10 kt. Seas 2 ft or less. .FRI...N winds less than 10 kt. Seas 2 ft or less. .FRI NIGHT...N winds less than 10 kt. Seas 2 ft or less, building to 3 ft after midnight. Caribbean N of 15N between 72W and 85W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 to 4 ft. .TONIGHT...S of 18N, E winds 10 to 15 kt. Elsewhere, E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 ft in the evening, subsiding to 2 ft or less. .TUE...S of 18N, E winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Elsewhere, E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 2 ft or less. .TUE NIGHT...S of 18N, E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Elsewhere, E winds less than 10 kt. Seas 2 ft or less. .WED...S of 18N, E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Elsewhere, SE winds less than 10 kt. Seas 2 ft or less. .WED NIGHT...NE winds 10 to 15 kt. Seas 2 ft or less. .THU...TROPICAL STORM CONDITIONS POSSIBLE. .THU NIGHT...HURRICANE CONDITIONS POSSIBLE. .FRI...HURRICANE CONDITIONS POSSIBLE. FRI NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. Caribbean from 11N to 15N W of 72W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 to 4 ft. .TONIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .TUE...E winds 10 to 15 kt. Seas 3 to 4 ft. .TUE NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. .WED...E winds 10 to 15 kt. Seas 3 to 4 ft. .WED NIGHT...NE winds less than 10 kt. Seas 3 to 4 ft. .THU...NE winds less than 10 kt. Seas 3 to 4 ft. .THU NIGHT...NW winds less than 10 kt. Seas 3 to 5 ft. .FRI...NW winds 10 to 15 kt. Seas 3 to 5 ft. .FRI NIGHT...W winds less than 10 kt. Seas 3 to 4 ft. SW Caribbean S of 11N .THIS AFTERNOON...E winds less than 10 kt. Seas 3 to 4 ft. .TONIGHT...N winds less than 10 kt. Seas 3 ft. .TUE...NE winds less than 10 kt. Seas 3 ft. .TUE NIGHT...NE winds less than 10 kt. Seas 3 ft. .WED...E winds less than 10 kt, shifting to W in the afternoon. Seas 3 ft. .WED NIGHT...N winds less than 10 kt. Seas 3 ft. .THU...N winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Seas 3 ft. .THU NIGHT...NW winds less than 10 kt. Seas 3 ft. .FRI...W winds less than 10 kt. Seas 3 ft. .FRI NIGHT...Variable winds less than 10 kt. Seas 3 to 4 ft. Caribbean between 64W and 72W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 2 ft or less Gulf of Venezuela, and 3 to 5 ft elsewhere. .TONIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .TUE...E winds 10 to 15 kt. Seas 3 to 4 ft. .TUE NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to 20 kt. Seas 2 ft or less Gulf of Venezuela, and 3 to 5 ft elsewhere. .WED...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to 15 kt Gulf of Venezuela, and NE 20 to 30 kt elsewhere. Seas 2 ft or less Gulf of Venezuela, and 4 to 6 ft elsewhere. .WED NIGHT...HURRICANE CONDITIONS POSSIBLE. .THU...HURRICANE CONDITIONS POSSIBLE. .THU NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .FRI...Variable winds less than 10 kt Gulf of Venezuela, and SE 15 to 25 kt elsewhere. Gulf of Venezuela, seas 3 ft in the morning, subsiding to 2 ft or less. Elsewhere, seas 5 to 7 ft. .FRI NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W ...HURRICANE WARNING... .THIS AFTERNOON...TROPICAL STORM CONDITIONS. NE winds 25 to 35 kt. Seas 8 to 11 ft. .TONIGHT...HURRICANE CONDITIONS EXPECTED. N winds 75 to 85 kt, becoming NE 90 to 100 kt after midnight. Seas 11 to 16 ft. .TUE...HURRICANE CONDITIONS EXPECTED. NE winds 85 to 105 kt. Seas 14 to 19 ft. .TUE NIGHT...HURRICANE CONDITIONS EXPECTED. SE winds 85 to 105 kt. Seas 16 to 21 ft. .WED...HURRICANE CONDITIONS POSSIBLE. S winds 85 to 105 kt. Seas 13 to 18 ft. .WED NIGHT...HURRICANE CONDITIONS POSSIBLE. .THU...E winds 20 to 30 kt. Seas 6 to 9 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .FRI...E winds 15 to 25 kt. Seas 6 to 8 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 6 to 9 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .THIS AFTERNOON...NE winds 15 to 25 kt. Seas 5 to 7 ft. .TONIGHT...NW winds 20 to 30 kt. Seas 6 to 9 ft. .TUE...SW winds 20 to 30 kt. Seas 7 to 10 ft. .TUE NIGHT...S winds 20 to 30 kt. Seas 7 to 10 ft. .WED...SE winds 15 to 25 kt. Seas 6 to 8 ft. .WED NIGHT...SE winds 10 to 20 kt. Seas 5 to 7 ft. .THU...E winds 10 to 20 kt. Seas 5 to 7 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .FRI...E winds 10 to 15 kt. Seas 4 to 6 ft. .FRI NIGHT...E winds less than 10 kt. Seas 4 to 6 ft. SYNOPSIS FOR THE SW N ATLC INCLUDING THE BAHAMAS .SYNOPSIS...A stalling front from 31N75W to 28N79W will move back W tonight as a ridge builds W and meanders from Bermuda to Port Canaveral on Tue and Wed. Hurricane Irma at 16.8N 53.3W 944 mb at 11 AM moving WSW at 12 kt with maximum sustained winds 105 kt gusts to 130 kt. Irma will intensify to 115 kt gusts to 140 kt near 16.5N 54.8W at 8 PM tonight, intensify to 120 kt gusts to 145 kt near 16.7N 57.1W at 8 AM Tue, intensify to 125 kt gusts to 150 kt near 18.2N 62.4W at 8 AM Wed, reach near 19.9N 68.0W at 8 AM Thu, reach near 21.2N 73.3W at 8 AM on Fri and near 22.0N 77.8W at 8 AM on Sat. ATLC waters from 27N to 31N W of 77W .THIS AFTERNOON...E winds 10 kt. Seas 3 ft. .TONIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .TUE...SE winds 10 kt. Seas 3 to 4 ft. .TUE NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. .WED...SW winds less than 10 kt. Seas 4 to 5 ft. .WED NIGHT...S winds less than 10 kt. Seas 4 to 6 ft. .THU...SW winds less than 10 kt. Seas 6 to 9 ft. .THU NIGHT...E winds less than 10 kt, shifting to NE after midnight. Seas 8 to 11 ft. .FRI...TROPICAL STORM CONDITIONS POSSIBLE. .FRI NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. ATLC WATERS FROM 27N TO 31N BETWEEN 65W AND 77W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 to 5 ft. .TONIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .TUE...E winds 10 to 15 kt. Seas 4 to 6 ft. .TUE NIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft. .WED...SE winds 10 to 20 kt. Seas 6 to 9 ft. .WED NIGHT...SE winds 10 to 20 kt. Seas 6 to 9 ft W of 70W, and 8 to 12 ft elsewhere. .THU...SE winds 10 to 20 kt. Seas 8 to 13 ft W of 70W, and 10 to 14 ft elsewhere. .THU NIGHT...SE winds 10 to 20 kt. Seas 9 to 14 ft. .FRI...TROPICAL STORM CONDITIONS POSSIBLE. .FRI...HURRICANE CONDITIONS POSSIBLE. Bahamas N of 22N .THIS AFTERNOON...E winds 10 to 15 kt. Seas 2 ft or less. .TONIGHT...E winds 10 to 15 kt. Seas 2 ft or less. .TUE...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 ft. .TUE NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 ft. .WED...SE winds 10 to 15 kt. Seas 3 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .THU...HURRICANE CONDITIONS POSSIBLE. .THU NIGHT...HURRICANE CONDITIONS POSSIBLE. .FRI...HURRICANE CONDITIONS POSSIBLE. .FRI NIGHT...HURRICANE CONDITIONS POSSIBLE. ATLC waters from 22N to 27N between 65W and the Bahamas .THIS AFTERNOON...E winds 10 to 15 kt. Seas 4 to 5 ft. .TONIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .TUE...E winds 10 to 15 kt. Seas 5 to 7 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft W of 70W, and 7 to 10 ft elsewhere. .WED...TROPICAL STORM CONDITIONS POSSIBLE. SE winds 10 to 15 kt W of 70W, and E 15 to 25 kt elsewhere. W of 70W, seas 6 to 9 ft. Elsewhere, seas 8 to 11 ft, building to 10 to 15 ft in the afternoon. .WED NIGHT...HURRICANE CONDITIONS POSSIBLE. .THU...HURRICANE CONDITIONS POSSIBLE. .THU NIGHT...HURRICANE CONDITIONS POSSIBLE. .FRI...HURRICANE CONDITIONS POSSIBLE. .FRI NIGHT...HURRICANE CONDITIONS POSSIBLE. ATLC waters S of 22N W of 65W .THIS AFTERNOON...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 to 5 ft. .TONIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .TUE...E winds 10 to 15 kt. Seas 4 to 6 ft. .TUE NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. E winds 10 to 20 kt. Seas 6 to 9 ft. .WED...HURRICANE CONDITIONS POSSIBLE. E winds 15 to 25 kt, becoming NE 30 to 40 kt in the afternoon. Seas 8 to 11 ft, building to 10 to 15 ft in the afternoon. .WED NIGHT...HURRICANE CONDITIONS POSSIBLE. .THU...HURRICANE CONDITIONS POSSIBLE. .THU NIGHT...HURRICANE CONDITIONS POSSIBLE. .FRI...HURRICANE CONDITIONS POSSIBLE. .FRI NIGHT...HURRICANE CONDITIONS POSSIBLE. ATLC waters from 19N to 22N between 55W and 65W ...HURRICANE WARNING... .THIS AFTERNOON...E winds 15 to 25 kt. Seas 8 to 11 ft. .TONIGHT...NE winds 20 to 30 kt. Seas 9 to 14 ft. .TUE...TROPICAL STORM CONDITIONS POSSIBLE. E winds 25 to 35 kt. Seas 12 to 17 ft. .TUE NIGHT...TROPICAL STORM CONDITIONS EXPECTED. E winds 35 to 45 kt. Seas 15 to 20 ft. .WED...HURRICANE CONDITIONS POSSIBLE. E winds 45 to 55 kt, increasing to 70 to 90 kt in the afternoon. Seas 17 to 22 ft. .WED NIGHT...HURRICANE CONDITIONS POSSIBLE. .THU...TROPICAL STORM CONDITIONS POSSIBLE. .THU NIGHT...E winds 15 to 25 kt. Seas 8 to 13 ft, subsiding to 7 to 10 ft after midnight. .FRI...E winds 15 to 25 kt. Seas 6 to 9 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 8 to 13 ft.