821 FZNT31 KNHC 101451 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1051 AM EDT Mon Mar 10 2025 Marine Weather HF Voice Broadcast for the Tropical N Atlantic from 07N to 19N W of 55W, the N Atlantic from 19N to 31N W of 55W including the 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 Atlantic from 07N to 19N W of 55W .SYNOPSIS...Weak high pressure prevails north of the area across the western Atlantic along about 25N. This pattern supports moderate to fresh NE to E trade winds offshore of northwestern Colombia and in the Gulf of Venezuela and will pulse to fresh to strong during the evening to early morning hours through Tue morning, then return Thu through Fri. A cold front currently moving across the eastern Gulf of America will enter the northwestern Caribbean this evening, reach from central Cuba to the Gulf of Honduras Tue morning, then stall from eastern Cuba to Belize early Wed before dissipating Wed afternoon. Expect fresh N winds and moderate seas behind the front through Tue morning. NW Caribbean W of 85W .THIS AFTERNOON...S winds 10 to 15 kt, shifting to SW in the afternoon. Seas 3 to 4 ft. .TONIGHT...N winds 10 to 20 kt. Seas 4 to 6 ft. .TUE...N winds 10 to 15 kt. Seas 4 to 6 ft. .TUE NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. .WED...E winds less than 10 kt. Seas 3 to 4 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 3 ft. .THU...SE winds 10 to 15 kt. Seas 3 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .FRI...SE winds 10 to 15 kt. Seas 3 to 4 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. Caribbean N of 15N between 72W and 85W .THIS AFTERNOON...E winds 10 to 15 kt S of 18N, and S less than 10 kt elsewhere. S of 18N, seas 3 to 5 ft. Elsewhere, seas 2 ft or less, building to 3 ft in the afternoon. .TONIGHT...S of 18N, E winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Elsewhere, SW winds less than 10 kt, shifting to W after midnight. Seas 3 to 4 ft. .TUE...E winds less than 10 kt S of 18N, and NW 10 to 15 kt elsewhere. Seas 3 to 5 ft. .TUE NIGHT...S of 18N, NE winds less than 10 kt. Elsewhere, N winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 to 5 ft. .WED...E winds less than 10 kt. Seas 3 to 4 ft. .WED NIGHT...NE winds less than 10 kt. Seas 3 ft. .THU...E winds less than 10 kt. Seas 3 ft. .THU NIGHT...E winds less than 10 kt. Seas 3 ft in the evening, subsiding to 2 ft or less. .FRI...E winds less than 10 kt. Seas 2 ft or less. .FRI NIGHT...E winds less than 10 kt. Seas 2 ft or less. Caribbean from 11N to 15N W of 72W .THIS AFTERNOON...E winds 15 to 25 kt within 90 nm of coast of Colombia, and E 10 to 20 kt elsewhere. Seas 5 to 7 ft. .TONIGHT...E winds 15 to 25 kt within 90 nm of coast of Colombia, and NE 10 to 20 kt elsewhere. Seas 4 to 6 ft. .TUE...E winds 15 to 20 kt within 90 nm of coast of Colombia, and NE 10 to 15 kt elsewhere. Seas 4 to 6 ft. .TUE NIGHT...NE winds 15 to 20 kt within 90 nm of coast of Colombia, and NE 10 to 15 kt elsewhere. Seas 3 to 5 ft. .WED...NE winds 10 to 15 kt. Seas 3 to 5 ft. .WED NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. .THU...E winds 10 to 15 kt. Seas 3 to 5 ft. .THU NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. .FRI...NE winds 10 to 15 kt. Seas 3 to 5 ft. .FRI NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. SW Caribbean S of 11N .THIS AFTERNOON...NE winds 10 to 15 kt. Seas 4 to 6 ft. .TONIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. .TUE...N winds 10 to 15 kt. Seas 4 to 6 ft. .TUE NIGHT...N winds 10 to 15 kt. Seas 4 to 6 ft. .WED...N winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 to 5 ft. .WED NIGHT...N winds 10 to 15 kt. Seas 3 to 5 ft. .THU...NE winds 10 to 15 kt. Seas 3 to 5 ft. .THU NIGHT...N winds 10 to 15 kt. Seas 3 to 5 ft. .FRI...N winds 10 to 15 kt. Seas 3 to 5 ft. .FRI NIGHT...N winds 10 to 15 kt. Seas 3 to 5 ft. Caribbean between 64W and 72W .THIS AFTERNOON...E winds 10 to 20 kt Gulf of Venezuela, and E 10 to 15 kt elsewhere. Seas 3 to 5 ft. .TONIGHT...NE winds 15 to 25 kt Gulf of Venezuela, and E 10 to 15 kt elsewhere. Seas 3 to 5 ft. .TUE...E winds 10 to 20 kt Gulf of Venezuela, and E 10 to 15 kt elsewhere. Seas 3 to 5 ft. .TUE NIGHT...NE winds 10 to 20 kt Gulf of Venezuela, and E 10 to 15 kt elsewhere. Seas 3 to 4 ft. .WED...E winds 10 to 15 kt. Seas 3 to 4 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .THU...E winds 10 to 15 kt. Seas 3 to 4 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .FRI...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 to 4 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 5 to 7 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...E winds 10 to 15 kt. Seas 4 to 6 ft. .WED...SE winds 10 to 15 kt. Seas 4 to 6 ft. .WED NIGHT...E winds less than 10 kt. Seas 4 to 6 ft. .THU...E winds less than 10 kt. Seas 4 to 6 ft. .THU NIGHT...E winds less than 10 kt. Seas 4 to 6 ft. .FRI...E winds less than 10 kt. Seas 4 to 6 ft. .FRI NIGHT...E winds less than 10 kt. Seas 3 to 5 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 4 to 6 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 15 kt. Seas 4 to 6 ft. .WED...E winds 10 to 15 kt. Seas 4 to 6 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .THU...E winds 10 to 15 kt. Seas 4 to 6 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .FRI...E winds 10 to 15 kt. Seas 3 to 5 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...A stationary frontal boundary extending between northeast Florida and south of Bermuda along 30N will lift northward today ahead of low pressure approaching the area from the west. This low pressure will move off the Georgia and South Carolina coasts this afternoon then shift eastward tonight. An associated cold front will move off the northeast Florida coast this evening, accompanied by strong to near gale-force winds and quickly building seas. The front will reach from Bermuda to east central Cuba Tue afternoon, followed by strong to gale-force winds and rough to very rough seas. The low will lift out to the northeast by mid week, as the front weakens while moving east of the area, with a trailing portion of the front stalling along roughly 20N on Thu before dissipating. Winds and seas will dissipate from west to east through late week as high pressure builds over the western Atlantic in the wake of the front. ATLC waters from 27N to 31N W of 77W ...GALE WARNING... .THIS AFTERNOON...SW winds 15 to 25 kt. Seas 5 to 7 ft. .TONIGHT...W winds 25 to 35 kt. Seas 6 to 9 ft, building to 8 to 12 ft after midnight. .TUE...NW winds 20 to 30 kt. Seas 9 to 14 ft. .TUE NIGHT...N winds 10 to 20 kt. Seas 8 to 11 ft. .WED...N winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Seas 6 to 8 ft. .WED NIGHT...S winds 10 to 15 kt. Seas 4 to 6 ft. .THU...S winds 10 to 15 kt. Seas 3 to 4 ft. .THU NIGHT...S winds 10 to 15 kt. Seas 3 ft. .FRI...S winds less than 10 kt. Seas 3 ft. .FRI NIGHT...S winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 to 4 ft. ATLC waters from 27N to 31N between 65W and 77W ...GALE WARNING... .THIS AFTERNOON...W of 70W, S winds 10 to 20 kt. Elsewhere, SE winds less than 10 kt, shifting to S in the afternoon. Seas 4 to 6 ft. .TONIGHT...W of 70W, SW winds 25 to 35 kt. Elsewhere, S winds 10 to 15 kt, increasing to 15 to 25 kt after midnight. Seas 7 to 10 ft W of 70W, and 5 to 7 ft elsewhere. .TUE...SW winds 25 to 35 kt. Seas 10 to 15 ft W of 70W, and 8 to 11 ft elsewhere. .TUE NIGHT...NW winds 20 to 30 kt W of 70W, and W 20 to 30 kt elsewhere. Seas 11 to 16 ft. .WED...N winds 15 to 25 kt. Seas 9 to 14 ft. .WED NIGHT...NE winds 10 to 20 kt. Seas 7 to 10 ft. .THU...SE winds less than 10 kt. Seas 5 to 7 ft. .THU NIGHT...SE winds 10 kt. Seas 4 to 6 ft. .FRI...SE winds less than 10 kt. Seas 4 to 6 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. Bahamas N of 22N .THIS AFTERNOON...S winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft in the afternoon. .TONIGHT...S winds 10 to 15 kt, shifting to SW 15 to 25 kt after midnight. Seas 3 to 5 ft. .TUE...NW winds 15 to 25 kt. Seas 4 to 6 ft. .TUE NIGHT...N winds 10 to 20 kt. Seas 3 to 5 ft. .WED...NE winds less than 10 kt. Seas 3 to 5 ft. .WED NIGHT...E winds less than 10 kt. Seas 3 to 5 ft. .THU...SE winds less than 10 kt. Seas 3 to 4 ft. .THU NIGHT...E winds less than 10 kt. Seas 3 ft. .FRI...E winds less than 10 kt. Seas 3 ft in the morning, subsiding to 2 ft or less. .FRI NIGHT...E winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft after midnight. ATLC waters from 22N to 27N between 65W and the Bahamas .THIS AFTERNOON...S winds 10 to 15 kt W of 70W, and S less than 10 kt elsewhere. Seas 3 to 4 ft. .TONIGHT...S winds 10 to 20 kt. Seas 4 to 6 ft. .TUE...SW winds 15 to 25 kt W of 70W, and S 15 to 25 kt elsewhere. Seas 6 to 9 ft. .TUE NIGHT...NW winds 15 to 25 kt W of 70W, and W 15 to 25 kt elsewhere. Seas 8 to 11 ft. .WED...N winds 10 to 20 kt. Seas 8 to 11 ft. .WED NIGHT...NE winds 10 to 15 kt. Seas 7 to 10 ft. .THU...E winds 10 kt. Seas 6 to 9 ft. .THU NIGHT...E winds 10 kt. Seas 5 to 7 ft. .FRI...E winds less than 10 kt. Seas 4 to 6 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. ATLC waters S of 22N W of 65W .THIS AFTERNOON...SE winds less than 10 kt. Seas 3 to 5 ft. .TONIGHT...SE winds less than 10 kt. Seas 3 to 4 ft. .TUE...S winds 10 to 15 kt. Seas 3 to 5 ft. .TUE NIGHT...W winds 10 to 15 kt. Seas 3 to 5 ft. .WED...NW winds less than 10 kt. Seas 4 to 6 ft. .WED NIGHT...NE winds less than 10 kt. Seas 4 to 6 ft. .THU...NE winds less than 10 kt. Seas 4 to 6 ft. .THU NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. .FRI...NE winds less than 10 kt. Seas 3 to 5 ft. .FRI NIGHT...NE winds less than 10 kt. Seas 3 to 5 ft. ATLC waters from 19N to 22N between 55W and 65W .THIS AFTERNOON...E winds less than 10 kt. Seas 5 to 7 ft. .TONIGHT...E winds less than 10 kt. Seas 4 to 6 ft. .TUE...SE winds 10 to 15 kt. Seas 4 to 6 ft. .TUE NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. .WED...S winds 10 to 15 kt. Seas 4 to 6 ft. .WED NIGHT...S winds less than 10 kt. Seas 5 to 7 ft. .THU...S winds less than 10 kt, shifting to W in the afternoon. Seas 5 to 7 ft. .THU NIGHT...NE winds less than 10 kt. Seas 5 to 7 ft. .FRI...E winds less than 10 kt. Seas 5 to 6 ft. .FRI NIGHT...E winds less than 10 kt. Seas 5 to 7 ft.