873 FZNT31 KNHC 070320 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1020 PM EST Thu Mar 6 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...A cold front extending from southeastern Cuba to northern Belize will weaken overnight before diminishing on Fri. Moderate NE winds are expected in the wake of the front through Fri morning, with locally fresh winds occurring through the Windward Passage and in the lee of Cuba. Elsewhere, locally fresh NE winds will be possible offshore of Colombia overnight, with winds strengthening and expanding through the Gulf of Venezuela Fri night. Locally rough seas will occur near and to the west of the strongest winds offshore of Colombia. Otherwise, moderate to fresh trade winds are expected across the basin this weekend as the pressure gradient strengthens between high pressure in the western Atlantic and the Colombian low. Fresh to strong winds are expected to pulse in the Gulf of Honduras nightly through this weekend. Looking ahead, a cold front moving through the Gulf of America this weekend is slated to enter the northwestern Caribbean by early next week, leading to fresh to locally strong N winds and locally rough seas in its wake. NW Caribbean W of 85W .TONIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. .FRI...E winds 10 to 15 kt. Seas 3 to 5 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .SAT...SE winds 10 to 20 kt. Seas 3 to 5 ft. .SAT NIGHT...SE winds 10 to 20 kt. Seas 4 to 6 ft. .SUN...SE winds 10 to 20 kt. Seas 4 to 6 ft. .SUN NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. .MON...N winds 10 to 20 kt. Seas 4 to 6 ft. .MON NIGHT...N winds 10 to 20 kt. Seas 5 to 7 ft. .TUE...N winds 10 to 15 kt, shifting to NE in the afternoon. Seas 4 to 6 ft. .TUE NIGHT...E winds less than 10 kt. Seas 3 to 5 ft. Caribbean N of 15N between 72W and 85W .TONIGHT...S of 18N, NE winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Elsewhere, NE winds 10 to 15 kt. Seas 2 ft or less, building to 3 to 4 ft after midnight. .FRI...E winds less than 10 kt S of 18N, and E 10 to 15 kt elsewhere. Seas 3 to 4 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft after midnight. .SAT...E winds 10 to 15 kt. Seas 3 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .SUN...SE winds 10 to 15 kt. Seas 3 to 5 ft. .SUN NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. .MON...SE winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 to 4 ft. .MON NIGHT...NE winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 to 5 ft. .TUE...NE winds 10 to 15 kt, shifting to E in the afternoon. Seas 3 to 5 ft. .TUE NIGHT...NE winds less than 10 kt, shifting to E after midnight. Seas 3 to 4 ft. Caribbean from 11N to 15N W of 72W .TONIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. .FRI...NE winds 10 to 15 kt. Seas 3 to 4 ft. .FRI NIGHT...E winds 15 to 25 kt within 90 nm of coast of Colombia, and NE 10 to 15 kt elsewhere. Seas 4 to 6 ft. .SAT...E winds 15 to 20 kt within 90 nm of coast of Colombia, and E 10 to 15 kt elsewhere. Seas 4 to 6 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .SUN...E winds 10 to 20 kt. Seas 4 to 6 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .MON...E winds 10 to 15 kt. Seas 4 to 6 ft. .MON NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. .TUE...NE winds 10 to 15 kt. Seas 4 to 6 ft. .TUE NIGHT...NE winds 10 to 20 kt. Seas 4 to 6 ft. SW Caribbean S of 11N .TONIGHT...N winds less than 10 kt. Seas 3 to 4 ft. .FRI...NE winds less than 10 kt. Seas 3 to 5 ft. .FRI NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. .SAT...NE winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 4 to 6 ft. .SAT NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. .SUN...NE winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 4 to 6 ft. .SUN NIGHT...NE winds less than 10 kt. Seas 4 to 6 ft. .MON...N winds less than 10 kt. Seas 4 to 6 ft. .MON NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. .TUE...NE winds 10 to 15 kt. Seas 4 to 6 ft. .TUE NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. Caribbean between 64W and 72W .TONIGHT...NE winds 10 to 20 kt Gulf of Venezuela, and E 10 to 15 kt elsewhere. Seas 3 to 5 ft. .FRI...E winds 10 to 15 kt. Seas 3 to 5 ft. .FRI NIGHT...E winds 15 to 20 kt Gulf of Venezuela, and E 10 to 15 kt elsewhere. Seas 3 to 5 ft. .SAT...E winds 10 to 15 kt. Gulf of Venezuela, seas 2 ft or less, building to 3 ft in the afternoon. Elsewhere, seas 3 to 5 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .SUN...E winds 10 to 15 kt. Seas 3 to 4 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .MON...E winds 10 to 15 kt. Seas 3 to 5 ft. .MON NIGHT...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...E winds 10 to 20 kt. Seas 3 to 5 ft. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .TONIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .FRI...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 4 to 6 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .SAT...E winds less than 10 kt. Seas 4 to 6 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .SUN...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 4 to 6 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .MON...E winds 10 to 15 kt. Seas 5 to 7 ft. .MON NIGHT...E winds less than 10 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. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .TONIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .FRI...E winds 10 to 15 kt. Seas 5 to 7 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .SAT...E winds 10 to 15 kt. Seas 5 to 7 ft. .SAT NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. .SUN...NE winds 10 to 15 kt. Seas 4 to 6 ft. .SUN NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. .MON...E winds 10 to 15 kt. Seas 5 to 7 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...E winds 10 to 15 kt. Seas 4 to 6 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...A cold front extending from 31N66W to southeastern Cuba will progress eastward through Fri, and gale force S to SW winds will occur ahead of the front north of 29N through Fri morning. Gale force W to NW winds will also prevail behind the cold front north of 29N through early Fri. The storm system will lift northeastward on Fri, allowing winds to diminish by Fri night. Widespread rough seas generated by this system will continue to progress to the south and east over the next several days, producing rough seas in excess of 8 ft north of 21N through Fri, and north of 20N through Sat. Peak seas of 15 to 19 ft are expected north of 27N between 76W and 63W tonight through Fri. Seas will slowly subside from west to east Sat through Sun. High pressure will build in the wake of the front offshore of Florida by Fri night, as a complex low pressure system strengthens north of the area. The pressure gradient between these features will support moderate to fresh SW winds north of 29N and west of 70W by Fri night, and west of 60W by Sat night. Looking ahead, a cold front is slated to push off the coast of the southeastern United States by early next week, leading to fresh to strong winds and rough seas in the wake of the front. ATLC waters from 27N to 31N W of 77W .TONIGHT...NW winds 15 to 25 kt. Seas 8 to 13 ft, subsiding to 7 to 10 ft after midnight. .FRI...SW winds less than 10 kt. Seas 5 to 7 ft. .FRI NIGHT...SW winds 10 to 20 kt. Seas 3 to 5 ft. .SAT...W winds 10 to 20 kt. Seas 4 to 6 ft. .SAT NIGHT...SW winds 10 to 15 kt. Seas 3 to 5 ft. .SUN...SW winds 10 to 15 kt. Seas 3 to 4 ft. .SUN NIGHT...SW winds 15 to 20 kt. Seas 4 to 6 ft. .MON...NW winds 20 to 25 kt. Seas 7 to 10 ft. .MON NIGHT...N winds 10 to 20 kt. Seas 7 to 10 ft. .TUE...E winds less than 10 kt. Seas 5 to 7 ft. .TUE NIGHT...SE winds 10 kt. Seas 4 to 6 ft. ATLC waters from 27N to 31N between 65W and 77W ...GALE WARNING... ...GALE CONDITIONS POSSIBLE EARLY NEXT WEEK... .TONIGHT...NW winds 25 to 35 kt W of 70W, and W 20 to 30 kt elsewhere. Seas 12 to 19 ft. .FRI...W of 70W, NW winds 10 to 20 kt, becoming W less than 10 kt in the afternoon, Seas 10 to 15 ft, subsiding to 8 to 11 ft in the afternoon. Elsewhere, NW winds 15 to 25 kt, diminishing to 10 to 15 kt in the afternoon, Seas 12 to 17 ft. .FRI NIGHT...SW winds 10 to 20 kt W of 70W, and W less than 10 kt elsewhere. Seas 6 to 9 ft W of 70W, and 9 to 14 ft elsewhere. .SAT...SW winds 10 to 20 kt. Seas 6 to 8 ft W of 70W, and 8 to 11 ft elsewhere. .SAT NIGHT...W winds 10 to 20 kt. Seas 6 to 8 ft. .SUN...SW winds 10 to 15 kt. Seas 5 to 7 ft. .SUN NIGHT...SW winds 10 to 20 kt. Seas 5 to 7 ft. .MON...SW winds 20 to 30 kt. Seas 7 to 10 ft. .MON NIGHT...NW winds 15 to 25 kt. Seas 10 to 15 ft. .TUE...NE winds 10 to 20 kt. Seas 8 to 13 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 6 to 9 ft. Bahamas N of 22N .TONIGHT...N winds 10 to 20 kt. Seas 4 to 6 ft. .FRI...E winds less than 10 kt. Seas 4 to 6 ft. .FRI NIGHT...SE winds less than 10 kt. Seas 3 to 5 ft. .SAT...S winds less than 10 kt. Seas 3 to 4 ft. .SAT NIGHT...SE winds less than 10 kt. Seas 3 ft. .SUN...S winds 10 to 15 kt. Seas 2 ft or less. .SUN NIGHT...SE winds less than 10 kt, shifting to S after midnight. Seas 2 ft or less. .MON...SW winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft in the afternoon. .MON NIGHT...N winds 10 to 15 kt. Seas 3 to 4 ft. .TUE...NE winds 10 to 15 kt. Seas 3 to 4 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. ATLC waters from 22N to 27N between 65W and the Bahamas .TONIGHT...NW winds 15 to 25 kt W of 70W, and W 10 to 20 kt elsewhere. Seas 8 to 13 ft W of 70W, and 7 to 10 ft elsewhere. .FRI...W of 70W, N winds 10 to 15 kt, shifting to NE in the afternoon. Elsewhere, N winds 10 to 20 kt. Seas 8 to 13 ft. .FRI NIGHT...NE winds less than 10 kt. Seas 6 to 9 ft W of 70W, and 8 to 11 ft elsewhere. .SAT...Variable winds less than 10 kt, becoming S less than 10 kt in the afternoon. Seas 6 to 8 ft. .SAT NIGHT...Variable winds less than 10 kt. Seas 5 to 7 ft. .SUN...S winds less than 10 kt. Seas 4 to 6 ft. .SUN NIGHT...S winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 to 5 ft. .MON...SW winds 10 to 20 kt. Seas 4 to 6 ft. .MON NIGHT...W winds 10 to 20 kt. Seas 5 to 7 ft. .TUE...NW winds 10 to 15 kt, shifting to N in the afternoon. Seas 6 to 8 ft. .TUE NIGHT...NE winds less than 10 kt. Seas 6 to 9 ft. ATLC waters S of 22N W of 65W .TONIGHT...NW winds less than 10 kt. Seas 4 to 6 ft. .FRI...N winds less than 10 kt, shifting to NE in the afternoon. Seas 4 to 6 ft. .FRI NIGHT...NE winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Seas 5 to 7 ft. .SAT...NE winds less than 10 kt. Seas 4 to 6 ft. .SAT NIGHT...E winds less than 10 kt. Seas 4 to 6 ft. .SUN...E winds less than 10 kt. Seas 3 to 5 ft. .SUN NIGHT...SE winds less than 10 kt. Seas 3 to 5 ft. .MON...S winds less than 10 kt. Seas 3 to 4 ft. .MON NIGHT...S winds less than 10 kt. Seas 3 ft in the evening, subsiding to 2 ft or less. .TUE...E winds less than 10 kt. Seas 2 ft or less. .TUE NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 to 5 ft. ATLC waters from 19N to 22N between 55W and 65W .TONIGHT...SE winds 10 to 15 kt. Seas 6 to 7 ft. .FRI...S winds less than 10 kt. Seas 5 to 7 ft. .FRI NIGHT...E winds less than 10 kt. Seas 5 to 7 ft. .SAT...E winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Seas 6 to 8 ft. .SAT NIGHT...E winds less than 10 kt. Seas 6 to 8 ft. .SUN...E winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Seas 6 to 7 ft. .SUN NIGHT...E winds less than 10 kt. Seas 5 to 7 ft. .MON...SE winds 10 kt. Seas 4 to 6 ft. .MON NIGHT...SE winds 10 kt. Seas 4 to 5 ft. .TUE...SE winds 10 kt. Seas 3 to 5 ft. .TUE NIGHT...E winds less than 10 kt. Seas 3 to 5 ft.