842 FZNT31 KNHC 200821 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 321 AM EST Mon Jan 20 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...Fresh northeast to east winds will prevail across most of the Caribbean and Tropical Atlantic waters well into the upcoming week, with locally strong to near gale winds developing each night offshore of Colombia through midweek. Easterly trade wind swell will produce rough seas through the Atlantic Passages through the upcoming week. A Gulf of Mexico cold front will move slowly southward across the Straits of Florida and Yucatan Channel this morning, then stall afterwards and weaken across the far northwestern Caribbean and western Cuba through Tue. Fresh to strong east winds and building seas will dominate most of the basin Mon night through early Wed as strong high pressure builds north of the cold front. The next strong J cold front will reach the Yucatan Channel Wed afternoon, then stall and dissipate Wed night. NW Caribbean W of 85W .TODAY...E to SE winds 10 to 15 kt. Seas 5 to 7 ft. .TONIGHT...E winds 10 to 15 kt. Seas 6 to 8 ft. .TUE...E winds 10 to 15 kt. Seas 5 to 7 ft. .TUE NIGHT...E winds less than 10 kt. Seas 4 to 6 ft. .WED...N winds 10 to 15 kt. Seas 6 to 9 ft. .WED NIGHT...NE winds 10 to 15 kt. Seas 6 to 9 ft. .THU...NE winds less than 10 kt. Seas 5 to 7 ft. .THU NIGHT...NE winds less than 10 kt. Seas 5 to 7 ft. .FRI...NE winds 10 to 20 kt. Seas 6 to 8 ft. .FRI NIGHT...NE winds 15 to 25 kt. Seas 7 to 10 ft. Caribbean N of 15N between 72W and 85W .TODAY...E winds 10 to 20 kt. Seas 6 to 9 ft S of 18N, and 3 to 5 ft elsewhere. .TONIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft S of 18N, and 4 to 6 ft elsewhere. .TUE...E winds 15 to 25 kt S of 18N, and E 10 to 15 kt elsewhere. Seas 6 to 9 ft S of 18N, and 4 to 6 ft elsewhere. .TUE NIGHT...S of 18N, E winds 10 to 20 kt. Elsewhere, E winds less than 10 kt in the evening, becoming variable winds less than 10 kt. Seas 6 to 9 ft S of 18N, and 3 to 5 ft elsewhere. .WED...NE winds 10 to 20 kt. Seas 5 to 7 ft. .WED NIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft. .THU...E winds 10 to 20 kt. Seas 5 to 7 ft. .THU NIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft. .FRI...NE winds 10 to 20 kt. Seas 5 to 7 ft. .FRI NIGHT...NE winds 15 to 25 kt. Seas 6 to 9 ft. Caribbean from 11N to 15N W of 72W .TODAY...E winds 15 to 25 kt. Seas 7 to 10 ft. .TONIGHT...E winds 20 to 30 kt within 90 nm of coast of Colombia, and E 15 to 25 kt elsewhere. Seas 8 to 11 ft. .TUE...E winds 15 to 25 kt. Seas 8 to 11 ft. .TUE NIGHT...E winds 20 to 30 kt within 90 nm of coast of Colombia, and E 15 to 25 kt elsewhere. Seas 8 to 11 ft. .WED...E winds 15 to 25 kt. Seas 8 to 11 ft. .WED NIGHT...NE winds 15 to 25 kt. Seas 7 to 10 ft. .THU...E winds 15 to 25 kt. Seas 8 to 11 ft. .THU NIGHT...NE winds 10 to 20 kt. Seas 7 to 10 ft. .FRI...NE winds 10 to 20 kt. Seas 8 to 11 ft. .FRI NIGHT...NE winds 10 to 20 kt. Seas 7 to 9 ft. SW Caribbean S of 11N .TODAY...NE winds 10 to 15 kt. Seas 6 to 9 ft. .TONIGHT...NE winds 10 to 20 kt. Seas 7 to 10 ft. .TUE...NE winds 10 to 20 kt. Seas 8 to 11 ft. .TUE NIGHT...NE winds 10 to 15 kt. Seas 7 to 10 ft. .WED...NE winds 10 to 15 kt. Seas 8 to 11 ft. .WED NIGHT...NE winds 10 to 20 kt. Seas 7 to 10 ft. .THU...NE winds 10 to 20 kt. Seas 8 to 11 ft. .THU NIGHT...NE winds 10 to 15 kt. Seas 6 to 9 ft. .FRI...NE winds 10 to 15 kt. Seas 7 to 10 ft. .FRI NIGHT...NE winds 10 to 20 kt. Seas 6 to 9 ft. Caribbean between 64W and 72W .TODAY...E winds 15 to 25 kt Gulf of Venezuela, and E 10 to 20 kt elsewhere. Seas 3 to 5 ft Gulf of Venezuela, and 6 to 9 ft elsewhere. .TONIGHT...E winds 20 to 25 kt Gulf of Venezuela, and E 10 to 20 kt elsewhere. Seas 4 to 6 ft Gulf of Venezuela, and 7 to 10 ft elsewhere. .TUE...E winds 15 to 25 kt Gulf of Venezuela, and E 10 to 20 kt elsewhere. Seas 3 to 5 ft Gulf of Venezuela, and 7 to 10 ft elsewhere. .TUE NIGHT...E winds 20 to 25 kt Gulf of Venezuela, and E 10 to 20 kt elsewhere. Seas 4 to 6 ft Gulf of Venezuela, and 7 to 9 ft elsewhere. .WED...E winds 10 to 20 kt. Seas 6 to 9 ft. .WED NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft. .THU...E winds 10 to 20 kt. Seas 6 to 8 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 6 to 7 ft. .FRI...E winds 10 to 20 kt. Seas 5 to 7 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .TODAY...E winds 10 to 20 kt. Seas 7 to 10 ft. .TONIGHT...E winds 10 to 20 kt. Seas 8 to 11 ft. .TUE...E winds 15 to 25 kt. Seas 8 to 11 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 8 to 11 ft. .WED...E winds 10 to 20 kt. Seas 8 to 11 ft. .WED NIGHT...E winds 10 to 20 kt. Seas 7 to 10 ft. .THU...E winds 10 to 20 kt. Seas 8 to 11 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 7 to 10 ft. .FRI...E winds 10 to 20 kt. Seas 7 to 10 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .TODAY...E winds 10 to 20 kt. Seas 7 to 10 ft. .TONIGHT...E winds 10 to 20 kt. Seas 7 to 10 ft. .TUE...E winds 10 to 20 kt. Seas 8 to 11 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 8 to 11 ft. .WED...E winds 10 to 20 kt. Seas 8 to 11 ft. .WED NIGHT...E winds 10 to 20 kt. Seas 7 to 10 ft. .THU...E winds 10 to 20 kt. Seas 7 to 10 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 7 to 10 ft. .FRI...E winds 10 to 20 kt. Seas 7 to 10 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 7 to 10 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...A cold front extends from 31N75W to the Straits of Florida. Fresh to strong southwest winds are ahead of the front N of 27N and east to a line from 31N65W to 27N742 while fresh to strong west to northwest winds are west of the front. The cold front will reach from near Bermuda to western Cuba by Mon evening then stall and weaken on Tue. Scattered showers and thunderstorms are along and within 60 nm east of the front north of 27N. Fresh trades in the far southern waters east of the Bahamas will weaken some on Wed. Another cold front is expected to move off the southeastern U.S. coast Tue evening, and reach from near 31N72W to the Florida Keys by Wed morning, then become aligned E to W along 27N and weaken quickly through early Thu. This front will be followed by strong to minimal gale force north winds and high seas north of 24N and W of about 70W through midday Wed. Low pressure is expected to develop offshore the southeastern U.S. Thu into Thu night, with a trailing cold front reaching to central Cuba. The low is expected to move well north of the area Fri, with the cold front reaching from near 31N70W to eastern Cuba by Fri night. Fresh to strong northwest winds are expected in the wake of tho front. ATLC waters from 27N to 31N W of 77W ...GALE WARNING... ...GALE CONDITIONS POSSIBLE N OF 29N WED... .TODAY...N winds 10 to 15 kt. Seas 6 to 8 ft. .TONIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft. .TUE...NE winds 10 to 20 kt. Seas 6 to 8 ft. .TUE NIGHT...N OF 29N, NE to E winds 15 to 20 kt becoming N to NE 20 to 30 kt late with frequent gusts to 35 kt. Seas 9 to 14 ft. S of 29N, NE to E winds 10 to 20 kt becoming N 20 to 30 kt late. Seas 6 to 9 ft, building to 8 to 13 ft late. .WED...N to NE winds 20 to 30 kt, except with frequent gusts to 35 kt N of 29N. Seas 9 to 14 ft. .WED NIGHT...NE winds 10 to 20 kt. Seas 9 to 12 ft. .THU...E winds 10 to 15 kt, shifting to S in the afternoon. Seas 8 to 10 ft. .THU NIGHT...NW winds 10 to 20 kt. Seas 7 to 9 ft. .FRI...NW winds 15 to 20 kt. Seas 7 to 9 ft. .FRI NIGHT...NW winds 15 to 20 kt. Seas 7 to 10 ft. ATLC waters from 27N to 31N between 65W and 77W ...GALE CONDITIONS POSSIBLE NW PART EARLY ON WED... .TODAY...W winds 10 to 15 kt. Seas 6 to 8 ft. .TONIGHT...NE winds 10 to 15 kt W of 70W, and S less than 10 kt elsewhere. Seas 6 to 8 ft. .TUE...E winds 10 to 15 kt W of 70W, and S less than 10 kt elsewhere. Seas 6 to 8 ft. .TUE NIGHT...S winds 10 to 20 kt. Seas 6 to 8 ft. .WED...Between 74W and 77W, N to NE winds 25 to 30 kt, with frequent gusts to 35 kt NW part in the morning. Between 65W and 70W, SW winds 10 to 20 kt. Seas 6 to 9 ft. Between 70W and 74W, W to NW winds 20 to 25 kt shifting to N to NE in the afternoon. Seas 8 to 11 ft. .WED NIGHT...NE winds 10 to 20 kt. Seas 8 to 11 ft. .THU...SE winds 10 to 15 kt. Seas 7 to 10 ft. .THU NIGHT...S winds 10 to 20 kt. Seas 7 to 8 ft. .FRI...W winds 15 to 20 kt. Seas 6 to 8 ft. .FRI NIGHT...NW winds 10 to 20 kt. Seas 8 to 11 ft. Bahamas N of 22N .TODAY...E winds 10 to 15 kt. Seas 3 to 4 ft. .TONIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .TUE...E winds 10 to 15 kt. Seas 3 to 5 ft. .TUE NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. .WED...S winds less than 10 kt, shifting to W in the afternoon. Seas 3 to 5 ft. .WED NIGHT...E winds less than 10 kt. Seas 3 to 5 ft. .THU...S winds less than 10 kt. Seas 4 to 6 ft. .THU NIGHT...N winds 10 to 15 kt. Seas 4 to 6 ft. .FRI...N winds 10 to 20 kt. Seas 4 to 6 ft. .FRI NIGHT...N winds 10 to 20 kt. Seas 5 to 7 ft. ATLC waters from 22N to 27N between 65W and the Bahamas .TODAY...SE winds 10 to 15 kt. Seas 4 to 6 ft. .TONIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .TUE...SE winds 10 to 15 kt. Seas 6 to 8 ft. .TUE NIGHT...SE winds 10 to 15 kt. Seas 6 to 8 ft. .WED...S winds 10 to 15 kt. Seas 6 to 8 ft. .WED NIGHT...SE winds less than 10 kt. Seas 6 to 9 ft. .THU...SE winds 10 to 15 kt. Seas 6 to 9 ft. .THU NIGHT...SE winds 10 to 15 kt. Seas 6 to 7 ft. .FRI...S winds 10 to 15 kt. Seas 6 to 7 ft. .FRI NIGHT...SE winds 10 to 15 kt, shifting to N after midnight. Seas 7 to 10 ft. ATLC waters S of 22N W of 65W .TODAY...E winds 10 to 20 kt. Seas 5 to 7 ft. .TONIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .TUE...E winds 10 to 20 kt. Seas 6 to 9 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft. .WED...E winds 10 to 15 kt. Seas 5 to 7 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 N to NE winds 15 to 20 kt. Seas 6 to 9 ft. .TONIGHT...NE winds 15 to 20 kt. Seas 6 to 9 ft. .TUE...NE winds 15 to 20 kt. Seas 5 to 7 ft. .TUE NIGHT...NE winds 20 to 30 kt. Seas 7 to 10 ft in N swell. Scattered showers. .WED...N to NE winds 20 to 30 kt, shifting to NE 15 to 20 kt in the afternoon. Seas 8 to 11 ft in NW to N swell. .WED NIGHT...N to NE winds 15 to 20 kt. Seas 6 to 9 ft. .THU...N winds 15 to 20 kt. Seas 4 to 6 ft. .THU NIGHT...N winds 15 to 20 kt. Seas 4 to 6 ft. .FRI...N winds 15 to 20 kt. Seas 4 to 6 ft. .FRI NIGHT...N to NE winds 15 to 20 kt. Seas 5 to 7 ft. ft. .THU NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .FRI...E winds 10 to 15 kt. Seas 4 to 6 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. ATLC waters from 19N to 22N between 55W and 65W .TODAY...E winds 15 to 20 kt. Seas 8 to 9 ft. .TONIGHT...E winds 15 to 20 kt. Seas 8 to 10 ft. .TUE...E winds 15 to 20 kt. Seas 8 to 11 ft. .TUE NIGHT...E winds 15 to 20 kt. Seas 9 to 11 ft. .WED...E winds 10 to 20 kt. Seas 8 to 11 ft. .WED NIGHT...E winds 10 to 20 kt. Seas 8 to 10 ft. .THU...E winds 10 to 20 kt. Seas 8 to 9 ft. .THU NIGHT...E winds 15 to 20 kt. Seas 7 to 10 ft. .FRI...E winds 15 to 20 kt. Seas 7 to 10 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 8 to 9 ft.