000 FZNT31 KNHC 031506 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1106 AM EDT Sun Sep 3 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...Fresh nocturnal trades are expected along the NW coast of Colombia tonight and on Mon night, then the gradient will relax. Building NE to E swells in association with Hurricane Irma will propagate W across the tropical waters E of Windwards today and tonight reaching the E Caribbean passages late Mon. By then, tropical storm force and greater conditions will have moved into the waters N of 15N E of 56W in association Hurricane Irma which was at 17.7N 48.4W at 11 AM this morning with 100 kt gusting 120 kt. Irma is forecast to intensify to 105 kt gusts to 130 kt near 17.1N 48.4W at 8 PM tonight, intensify to 110 kt gusts to 135 kt near 16.6N 52.2W at 8 AM Mon, intensify to 115 kt gusts to 140 kt near 16.4N 54.3W at 8 PM Mon, and intensify to 120 kt gusts to 145 kt near 16.7N 56.6W at 8 AM Tue. NW Caribbean W of 85W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 to 4 ft. .TONIGHT...E winds 10 to 15 kt. Seas 3 ft. .MON...E winds 10 to 15 kt. Seas 3 ft. .MON NIGHT...E winds 10 to 15 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 less than 10 kt. 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 to E winds 5 to 10 kt. Seas 2 ft or less. Caribbean N of 15N between 72W and 85W .THIS AFTERNOON...E winds 10 to 20 kt. Seas 3 to 5 ft. .TONIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .MON...E winds 10 to 15 kt. Seas 3 to 4 ft. .MON NIGHT...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 10 to 15 kt. 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...E winds 10 to 15 kt S of 18N, and SE less than 10 kt elsewhere. Seas 2 ft or less. .WED NIGHT...E winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft after midnight. .THU...TROPICAL STORM CONDITIONS POSSIBLE. .THU NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. Caribbean from 11N to 15N W of 72W .THIS AFTERNOON...E winds 10 to 20 kt. Seas 5 to 6 ft. .TONIGHT...E winds 10 to 20 kt. Seas 4 to 5 ft. .MON...E winds 10 to 20 kt. Seas 3 to 5 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. .TUE...E winds 10 to 20 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...N to NE winds 5 to 10 kt. Seas 3 to 4 ft. SW Caribbean S of 11N .THIS AFTERNOON...SE winds 10 to 15 kt. Seas 3 to 5 ft. .TONIGHT...N winds less than 10 kt, shifting to NE after midnight. Seas 3 to 5 ft. .MON...NE winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 to 4 ft. .MON NIGHT...N winds less than 10 kt. Seas 3 ft. .TUE...N winds less than 10 kt, shifting to W in the afternoon. Seas 3 ft. .TUE NIGHT...N winds less than 10 kt. Seas 3 ft. .WED...SE 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...S winds less than 10 kt, shifting to W in the afternoon. Seas 3 ft. .THU NIGHT...W to NW winds 5 to 10 kt. Seas 3 ft. Caribbean between 64W and 72W .THIS AFTERNOON...E winds 10 to 20 kt. Seas 3 to 5 ft. .TONIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .MON...E winds 10 to 20 kt. Seas 3 to 5 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. .TUE...E winds 10 to 15 kt. Seas 3 to 4 ft. .TUE NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .WED...HURRICANE CONDITIONS POSSIBLE. .WED NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. .THU...TROPICAL STORM CONDITIONS POSSIBLE. .THU NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W ...HURRICANE WARNING... .THIS AFTERNOON...E winds 10 to 15 kt. Seas 5 to 7 ft. .TONIGHT...NE winds 10 to 20 kt. Seas 6 to 8 ft. .MON...HURRICANE CONDITIONS POSSIBLE. NE winds 10 to 20 kt, increasing to 20 to 30 kt in the afternoon. Seas 7 to 10 ft. .MON NIGHT...HURRICANE CONDITIONS EXPECTED. NE winds 40 to 50 kt, increasing to 90 to 100 kt after midnight. Seas 8 to 13 ft, building to 12 to 17 ft after midnight. .TUE...HURRICANE CONDITIONS POSSIBLE. NE winds 85 to 105 kt. Seas 12 to 17 ft, building to 15 to 20 ft in the afternoon. .TUE NIGHT...HURRICANE CONDITIONS POSSIBLE. .WED...HURRICANE CONDITIONS POSSIBLE. .WED NIGHT...HURRICANE CONDITIONS POSSIBLE. .THU...TROPICAL STORM CONDITIONS POSSIBLE. .THU NIGHT...E to SE winds 15 to 20 kt. Seas 4 to 6 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .THIS AFTERNOON...E winds less than 10 kt. Seas 4 to 6 ft. .TONIGHT...NE winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 5 to 7 ft. .MON...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 10 to 15 kt, increasing to 15 to 25 kt in the afternoon. Seas 5 to 7 ft. .MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. N winds 15 to 25 kt. Seas 6 to 9 ft. .TUE...TROPICAL STORM CONDITIONS POSSIBLE. SW winds 20 to 30 kt. Seas 7 to 10 ft. .TUE NIGHT...S winds 15 to 25 kt. Seas 7 to 10 ft. .WED...SE winds 15 to 25 kt. Seas 6 to 9 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 15 to 20 kt. Seas 6 to 8 ft. SYNOPSIS FOR THE SW N ATLC INCLUDING THE BAHAMAS .SYNOPSIS...A trough extending across the waters e of NE Florida will move E and stall from 31N75W to NE Florida tonight and Mon, and then wash out on Tue as a ridge builds W to NE Florida where it will meander through mid week. Building NE to E swells will propagate W across the tropical waters S of 22N today through Mon ahead of tropical storm force and greater conditions that will shift W across the tropical waters S of 21N through mid week in association with Hurricane Irma which was at 17.6N 48.4W at 11 AM this morning with 100 kt gusting 120 kt. Irma is forecast to intensify to 105 kt gusts to 130 kt near 17.1N 48.4W at 8 PM tonight, intensify to 110 kt gusts to 135 kt near 16.6N 52.2W at 8 AM Mon, intensify to 115 kt gusts to 140 kt near 16.4N 54.3W at 8 PM Mon, intensify to 120 kt gusts to 145 kt near 16.7N 56.6W at 8 AM Tue and reach near 18.2N 61.8W at 8 AM Wed. ATLC waters from 27N to 31N W of 77W .THIS AFTERNOON...Variable winds less than 10 kt. Seas 3 to 4 ft. .TONIGHT...E winds less than 10 kt. Seas 3 ft. .MON...E winds less than 10 kt. Seas 3 ft. .MON NIGHT...E winds 10 kt. Seas 3 to 4 ft. .TUE...SE winds less than 10 kt. Seas 3 to 4 ft. .TUE NIGHT...SE winds 10 kt. Seas 3 to 5 ft. .WED...SE winds 10 kt. Seas 4 to 5 ft. .WED NIGHT...S winds 10 kt. Seas 4 to 6 ft. .THU...S winds 10 kt. Seas 5 to 7 ft. .THU NIGHT...E to SE winds 5 to 10 kt. Seas 6 to 9 ft in E to SE swell. ATLC WATERS FROM 27N TO 31N BETWEEN 65W AND 77W .THIS AFTERNOON...E winds less than 10 kt. Seas 4 to 5 ft. .TONIGHT...E winds less than 10 kt. Seas 3 to 4 ft. .MON...E winds less than 10 kt. Seas 3 to 5 ft. .MON NIGHT...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...SE winds 10 to 15 kt. Seas 4 to 6 ft. .WED...SE winds 10 to 20 kt. Seas 5 to 7 ft. .WED NIGHT...SE winds 10 to 15 kt W of 70W, and SE 10 to 20 kt elsewhere. Seas 6 to 9 ft W of 70W, and 8 to 11 ft elsewhere. .THU...TROPICAL STORM CONDITIONS POSSIBLE. .THU NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. Bahamas N of 22N .THIS AFTERNOON...E winds less than 10 kt. Seas 2 ft or less. .TONIGHT...NE winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 2 ft or less. .MON...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 2 ft or less. .MON NIGHT...E winds less than 10 kt. Seas 2 ft or less. .TUE...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 2 ft or less, building to 3 ft in the afternoon. .TUE NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 ft. .WED...E winds 10 to 15 kt, shifting to SE in the afternoon. 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. ATLC waters from 22N to 27N between 65W and the Bahamas .THIS AFTERNOON...E winds 10 kt. Seas 4 to 5 ft. .TONIGHT...E winds 10 kt. Seas 4 to 5 ft. .MON...E winds 10 kt. Seas 4 to 5 ft. .MON NIGHT...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 15 kt. Seas 5 to 6 ft W of 70W, and 6 to 9 ft elsewhere. .WED...TROPICAL STORM CONDITIONS POSSIBLE. .WED NIGHT...HURRICANE CONDITIONS POSSIBLE. .THU...HURRICANE CONDITIONS POSSIBLE. .THU NIGHT...HURRICANE CONDITIONS POSSIBLE. ATLC waters S of 22N W of 65W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 4 to 6 ft. .TONIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .MON...E winds less than 10 kt. Seas 3 to 5 ft. .MON NIGHT...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...E winds 10 to 15 kt. Seas 5 to 7 ft. .WED...HURRICANE CONDITIONS POSSIBLE. .WED NIGHT...HURRICANE CONDITIONS POSSIBLE. .THU...HURRICANE CONDITIONS POSSIBLE. .THU NIGHT...HURRICANE CONDITIONS POSSIBLE. ATLC waters from 19N to 22N between 55W and 65W ...TROPICAL STORM WARNING... .THIS AFTERNOON...E winds 10 to 15 kt. Seas 6 to 8 ft. .TONIGHT...NE winds 10 to 20 kt. Seas 6 to 9 ft. .MON...NE winds 15 to 25 kt. Seas 7 to 10 ft. .MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 20 to 30 kt. Seas 8 to 13 ft. .TUE...HURRICANE CONDITIONS POSSIBLE. E winds 25 to 35 kt. Seas 10 to 15 ft. .TUE NIGHT...HURRICANE CONDITIONS POSSIBLE. .WED...HURRICANE CONDITIONS POSSIBLE. .WED NIGHT...HURRICANE CONDITIONS POSSIBLE. .THU...HURRICANE CONDITIONS POSSIBLE. .THU NIGHT...E to SE winds 15 to 20 kt. Seas 7 to 10 ft in E to SE swell.