000 FZNT31 KNHC 090918 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 418 AM EST Thu Mar 9 2023 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 Atlantic from 07N to 19N between 55W and 64W .SYNOPSIS...A cold front will reach the Greater Antilles today, producing fresh northerly winds and showers. A significant swell event will follow the front, creating hazardous marine conditions across the Atlantic waters and the NE Caribbean passages. The front will extend from the Leeward Islands to Jamaica to the western tip of Cuba on Fri before dissipating Fri night. The swell event will also propagate across the waters E of Leeward Islands late Thu into Fri. Gentle to moderate winds will dominate the remainder of the forecast period, except for moderate to fresh winds in the SE and south-central Caribbean, and fresh to strong winds in the Gulf of Honduras Sun night. NW Caribbean W of 85W .TODAY...E winds 10 to 15 kt. Seas 3 ft. .TONIGHT...E winds 10 to 15 kt. Seas 3 ft. .FRI...E winds 10 to 15 kt. Seas 3 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft after midnight. .SAT...E winds less than 10 kt. Seas 2 ft or less. .SAT NIGHT...E winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft after midnight. .SUN...SE winds 10 to 15 kt. Seas 3 ft. .SUN NIGHT...SE winds 10 to 20 kt. Seas 3 to 5 ft. .MON...SE winds 10 to 15 kt. Seas 3 to 5 ft. .MON NIGHT...SE winds 10 to 20 kt. Seas 3 to 5 ft. Caribbean N of 15N between 72W and 85W .TODAY...NE winds 10 to 15 kt, shifting to E in the afternoon. Seas 3 ft. .TONIGHT...E winds less than 10 kt S of 18N, and E 10 to 20 kt elsewhere. Seas 3 to 5 ft. .FRI...E winds less than 10 kt S of 18N, and E 10 to 15 kt elsewhere. Seas 3 to 5 ft. .FRI NIGHT...E winds less than 10 kt. Seas 2 ft or less. .SAT...SE winds less than 10 kt. Seas 3 ft. .SAT NIGHT...SE winds less than 10 kt. Seas 2 ft or less. .SUN...SE winds less than 10 kt. Seas 2 ft or less. .SUN NIGHT...SE winds less than 10 kt. Seas 2 ft or less. .MON...SE winds less than 10 kt. Seas 2 ft or less. .MON NIGHT...SE winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft after midnight. Caribbean from 11N to 15N W of 72W .TODAY...NE winds 10 to 15 kt within 90 nm of coast of Colombia, and NE less than 10 kt elsewhere. Seas 3 to 4 ft. .TONIGHT...NE winds 10 kt. Seas 3 ft. .FRI...E winds 10 to 15 kt. Seas 3 to 4 ft. .FRI NIGHT...E winds 15 to 20 kt within 90 nm of coast of Colombia, and E 10 to 15 kt elsewhere. Seas 3 to 5 ft. .SAT...E winds 10 to 15 kt. 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 4 ft. .MON...E winds 10 to 15 kt. Seas 3 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. SW Caribbean S of 11N .TODAY...NE winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 to 4 ft. .TONIGHT...NE winds less than 10 kt. Seas 3 ft. .FRI...NE winds less than 10 kt. Seas 3 to 4 ft. .FRI NIGHT...NE winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Seas 3 to 5 ft. .SAT...NE winds less than 10 kt. Seas 3 to 5 ft. .SAT NIGHT...NE winds less than 10 kt. Seas 3 to 4 ft. .SUN...NE winds less than 10 kt. Seas 3 to 4 ft. .SUN NIGHT...NE winds 10 kt. Seas 3 ft. .MON...NE winds less than 10 kt. Seas 3 ft. .MON NIGHT...NE winds less than 10 kt. Seas 3 ft. Caribbean between 64W and 72W .TODAY...NE winds 10 to 15 kt Gulf of Venezuela, and NE less than 10 kt elsewhere. Seas 3 ft. .TONIGHT...Gulf of Venezuela, NE winds 10 to 15 kt. Elsewhere, NE winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 2 ft or less Gulf of Venezuela, and 3 to 5 ft elsewhere. .FRI...NE winds 10 to 15 kt. Seas 2 ft or less Gulf of Venezuela, and 3 to 5 ft elsewhere. .FRI NIGHT...NE 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. Seas 3 to 4 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .SUN...E winds 10 to 15 kt. Seas 3 to 5 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 20 kt. Seas 3 to 5 ft. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .TODAY...W winds 10 to 15 kt. Seas 5 to 7 ft. .TONIGHT...NW winds 10 to 15 kt. Seas 6 to 9 ft. .FRI...NW winds less than 10 kt. Seas 6 to 9 ft. .FRI NIGHT...N winds less than 10 kt in the evening, becoming variable winds less than 10 kt. Seas 6 to 8 ft. .SAT...E winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Seas 5 to 7 ft. .SAT NIGHT...SE winds less than 10 kt. Seas 6 to 8 ft. .SUN...S winds less than 10 kt. Seas 6 to 8 ft. .SUN NIGHT...Variable winds less than 10 kt. Seas 5 to 7 ft. .MON...E winds less than 10 kt. Seas 4 to 6 ft. .MON NIGHT...E winds less than 10 kt. Seas 5 to 7 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .TODAY...E winds less than 10 kt. Seas 3 to 5 ft. .TONIGHT...E winds less than 10 kt. Seas 3 to 5 ft. .FRI...E winds less than 10 kt. Seas 4 to 6 ft. .FRI NIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft. .SAT...E winds 10 to 15 kt. Seas 5 to 7 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .SUN...E winds 10 to 15 kt. Seas 6 to 8 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 6 to 8 ft. .MON...E winds 10 to 15 kt. Seas 5 to 7 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...A cold front extends from 31N42W across the Turks and Caicos and into the Straits of Florida. Strong to near gale- force winds remain on both sides of the front, mainly N of 21N and E of 75W. Strong to near gale force NW winds will persist N of 27N and E of 65W through Fri. A significant swell event will follow the front, with seas of 12 to 20 ft covering most of the waters N of 25N and E of 74W. Seas of 12 ft will reach as far south as 22N later this morning. Looking ahead, the next cold front is forecast to move off the southeast U.S. by Fri afternoon, bringing strong to near gale force winds to waters east of Florida. This system will move eastward across the area during the weekend, with minimal gale conditions possibly developing ahead of the front. ATLC waters from 27N to 31N W of 77W .TODAY...NE winds 10 to 15 kt. Seas 6 to 8 ft. .TONIGHT...E winds less than 10 kt. Seas 5 to 7 ft. .FRI...SW winds 10 to 20 kt. Seas 6 to 8 ft. .FRI NIGHT...W winds 15 to 25 kt. Seas 7 to 10 ft. .SAT...NW winds 10 to 20 kt. Seas 7 to 10 ft. .SAT NIGHT...N winds 10 to 15 kt. Seas 6 to 9 ft. .SUN...SE winds 10 to 15 kt. Seas 6 to 7 ft. .SUN NIGHT...S winds 15 to 25 kt. Seas 6 to 9 ft. .MON...W winds 15 to 25 kt. Seas 8 to 11 ft. .MON NIGHT...NW winds 10 to 15 kt. Seas 8 to 11 ft. ATLC waters from 27N to 31N between 65W and 77W ...GALE CONDITIONS POSSIBLE... .TODAY...N winds 15 to 25 kt. Seas 8 to 13 ft W of 70W, and 11 to 14 ft elsewhere. .TONIGHT...N winds 10 to 20 kt W of 70W, and NW 15 to 25 kt elsewhere. Seas 8 to 13 ft. .FRI...W of 70W, N winds less than 10 kt, shifting to W in the afternoon. Elsewhere, NW winds 10 to 20 kt. Seas 8 to 11 ft W of 70W, and 10 to 14 ft elsewhere. .FRI NIGHT...W of 70W, SW winds 15 to 25 kt. Elsewhere, NW winds less than 10 kt, becoming SW 10 to 20 kt after midnight. Seas 8 to 11 ft W of 70W, and 9 to 12 ft elsewhere. .SAT...W winds 20 to 35 kt. Seas 9 to 13 ft. .SAT NIGHT...NW winds 20 to 35 kt. Seas 9 to 14 ft. .SUN...NW winds 15 to 25 kt. Seas 10 to 15 ft. .SUN NIGHT...NW winds 10 to 15 kt, shifting to SW after midnight. Seas 9 to 14 ft. .MON...SW winds 15 to 25 kt. Seas 9 to 12 ft. .MON NIGHT...SW winds 10 to 20 kt. Seas 8 to 12 ft. Bahamas N of 22N .TODAY...NE winds 10 to 15 kt. Seas 4 to 6 ft. .TONIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. .FRI...E winds 10 to 15 kt, shifting to SE in the afternoon. Seas 4 to 6 ft. .FRI NIGHT...SE winds less than 10 kt, shifting to S after midnight. Seas 3 to 5 ft. .SAT...W winds 10 to 20 kt. Seas 4 to 6 ft. .SAT NIGHT...NW winds 10 to 15 kt, shifting to N after midnight. Seas 3 to 5 ft. .SUN...NE winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Seas 3 to 5 ft. .SUN NIGHT...SE winds less than 10 kt. Seas 3 to 5 ft. .MON...SW winds less than 10 kt. Seas 4 to 6 ft. .MON NIGHT...SW winds less than 10 kt. Seas 3 to 5 ft. ATLC waters from 22N to 27N between 65W and the Bahamas .TODAY...N winds 10 to 20 kt. Seas 8 to 13 ft. .TONIGHT...N winds 10 to 20 kt W of 70W, and N 15 to 20 kt elsewhere. Seas 9 to 11 ft. .FRI...W of 70W, N winds 10 to 15 kt in the morning, becoming variable winds less than 10 kt. Elsewhere, N winds 10 to 15 kt. Seas 8 to 11 ft. .FRI NIGHT...W of 70W, Variable winds less than 10 kt, becoming S 10 to 15 kt after midnight. Elsewhere, N winds less than 10 kt, shifting to SE after midnight. Seas 8 to 11 ft. .SAT...SW winds 15 to 25 kt. Seas 8 to 10 ft. .SAT NIGHT...W winds 10 to 20 kt. Seas 8 to 11 ft. .SUN...NW winds 10 to 20 kt. Seas 8 to 11 ft. .SUN NIGHT...NE winds less than 10 kt. Seas 7 to 10 ft. .MON...S winds less than 10 kt. Seas 8 to 11 ft. .MON NIGHT...S winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 7 to 9 ft. ATLC waters S of 22N W of 65W .TODAY...N winds 10 to 15 kt. Seas 6 to 8 ft. .TONIGHT...N winds 10 to 15 kt. Seas 6 to 9 ft. .FRI...N winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 6 to 8 ft. .FRI NIGHT...E winds less than 10 kt. Seas 5 to 7 ft. .SAT...S winds less than 10 kt. Seas 5 to 7 ft. .SAT NIGHT...Variable winds less than 10 kt, becoming SW less than 10 kt after midnight. Seas 5 to 7 ft. .SUN...NW winds less than 10 kt. Seas 4 to 6 ft. .SUN NIGHT...E winds less than 10 kt. Seas 3 to 5 ft. .MON...E winds less than 10 kt. Seas 4 to 6 ft. .MON NIGHT...SE winds less than 10 kt. Seas 5 to 7 ft. ATLC waters from 19N to 22N between 55W and 65W .TODAY...NW winds 10 to 20 kt. Seas 8 to 12 ft. .TONIGHT...NW winds 10 to 15 kt. Seas 10 to 12 ft. .FRI...NW winds 10 to 15 kt. Seas 9 to 11 ft. .FRI NIGHT...N winds 10 kt. Seas 9 to 11 ft. .SAT...E winds 10 kt in the morning, becoming variable winds less than 10 kt. Seas 9 to 11 ft. .SAT NIGHT...S winds less than 10 kt. Seas 8 to 10 ft. .SUN...SW winds 10 to 15 kt. Seas 7 to 9 ft. .SUN NIGHT...W winds less than 10 kt. Seas 5 to 7 ft. .MON...W winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Seas 6 to 9 ft. .MON NIGHT...Variable winds less than 10 kt. Seas 7 to 10 ft.