600 FZNT31 KNHC 081503 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1003 AM EST Wed Mar 8 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...Gentle to locally moderate winds will prevail across most of the basin today due to a weak pressure gradient as an Atlantic cold front sinks southward toward the Caribbean islands. The cold front is forecast to reach the Greater Antilles on Thu, then extend from the Leeward Islands to Jamaica to the western tip of Cuba early Fri before dissipating Fri night. The front will bring large N swell through the NE Caribbean passages and Tropical N Atlantic waters beginning Thu and lasting into the weekend. Also, fresh N to NE winds are expected behind the front. NW Caribbean W of 85W .TODAY...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 to 4 ft. .TONIGHT...E winds 10 to 15 kt. Seas 3 ft. .THU...E winds 10 to 15 kt. Seas 3 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 3 ft. .FRI...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 3 ft. .SAT...E winds less than 10 kt. Seas 3 ft. .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 to 4 ft. .SUN NIGHT...SE winds 10 to 20 kt. Seas 3 to 5 ft. Caribbean N of 15N between 72W and 85W .TODAY...S of 18N, NE winds less than 10 kt. Elsewhere, NE winds 10 to 15 kt, shifting to E in the afternoon. Seas 3 to 4 ft. .TONIGHT...S of 18N, NE winds less than 10 kt. Elsewhere, NE winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 ft. .THU...NE winds 10 to 15 kt, shifting to E in the afternoon. Seas 3 to 4 ft. .THU NIGHT...E winds less than 10 kt S of 18N, and E 10 to 20 kt elsewhere. Seas 3 to 5 ft. .FRI...E winds 10 to 15 kt. Seas 3 to 5 ft. .FRI NIGHT...E winds less than 10 kt. Seas 3 to 4 ft. .SAT...SE winds less than 10 kt. Seas 2 ft or less, building to 3 ft in the afternoon. .SAT NIGHT...E 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, increasing to 10 to 15 kt after midnight. Seas 2 ft or less. Caribbean from 11N to 15N W of 72W .TODAY...NE winds 10 to 15 kt. Seas 4 to 6 ft. .TONIGHT...Within 90 nm of coast of Colombia, NE winds 10 to 15 kt. Elsewhere, NE winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Seas 3 to 4 ft. .THU...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. .THU NIGHT...Within 90 nm of coast of Colombia, NE winds 10 to 15 kt. Elsewhere, NE winds 10 to 15 kt, shifting to E after midnight. Seas 3 ft. .FRI...E winds 10 to 15 kt. Seas 3 to 4 ft. .FRI NIGHT...E winds 10 to 15 kt. 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 5 ft. .SUN...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 to 4 ft. .SUN 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 4 to 6 ft. .TONIGHT...N winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Seas 3 to 5 ft. .THU...NE winds less than 10 kt. Seas 3 to 4 ft. .THU NIGHT...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...NE winds 10 to 15 kt. Seas 3 to 5 ft. .SAT...N 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...E winds less than 10 kt. Seas 3 ft. Caribbean between 64W and 72W .TODAY...NE winds 10 to 20 kt Gulf of Venezuela, and E less than 10 kt elsewhere. Seas 3 to 4 ft. .TONIGHT...NE winds 10 to 15 kt Gulf of Venezuela, and NE less than 10 kt elsewhere. Seas 3 ft. .THU...NE winds 10 to 20 kt Gulf of Venezuela, and NE less than 10 kt elsewhere. Seas 3 ft. .THU NIGHT...Gulf of Venezuela, NE winds 10 to 20 kt,Seas 3 ft in the evening, subsiding to 2 ft or less. Elsewhere, NE winds less than 10 kt, increasing to 10 to 15 kt after midnight,Seas 3 to 5 ft. .FRI...NE winds 10 to 15 kt. Seas 3 to 5 ft. .FRI NIGHT...E winds 10 to 15 kt. 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 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. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .TODAY...SW winds less than 10 kt. Seas 3 to 5 ft. .TONIGHT...W winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 4 to 6 ft. .THU...W winds 10 to 15 kt. Seas 5 to 7 ft. .THU NIGHT...W winds 10 to 15 kt. Seas 6 to 9 ft. .FRI...NW winds less than 10 kt. Seas 6 to 9 ft. .FRI NIGHT...NE 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 6 to 9 ft. .SAT NIGHT...SE winds less than 10 kt. Seas 6 to 9 ft. .SUN...SE winds less than 10 kt. Seas 6 to 8 ft. .SUN 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 4 to 6 ft. .TONIGHT...E winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Seas 3 to 5 ft. .THU...E winds less than 10 kt. Seas 3 to 5 ft. .THU NIGHT...E winds less than 10 kt. Seas 3 to 5 ft. .FRI...E winds less than 10 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...E winds 10 to 15 kt. Seas 6 to 8 ft. .SUN...E winds 10 to 15 kt. Seas 6 to 8 ft. .SUN 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 31N53W to 26N70W to N Florida. Gale force winds prevail on both sides of the front, mainly N of 28N between 55W and 67W. The front will reach from 25N55W to SE Florida by this evening, and will reach the N coasts of Hispaniola and Cuba Thu morning. Gale force winds will continue on either side of the front today, mainly N of 28N and E of 67W. Winds are forecast to diminish below gale force over the NE waters by late this afternoon, but strong NW winds will persist N of 27N and E of 65W through Fri. A significant NW to N swell event will follow the front, with seas of 12 to 21 ft covering most of the waters N of 25N and E of 74W by early this afternoon. Seas of 12 ft will reach as far south as 21N Thu. Looking ahead, the next cold front is forecast to move off the southeast U.S. by Fri afternoon, brining strong to near gale force winds to waters east of Florida. This system will move eastward across the area during the weekend, with gale force winds possibly developing N of 29N and E of 70W. ATLC waters from 27N to 31N W of 77W .TODAY...NE winds 10 to 20 kt. Seas 6 to 8 ft. .TONIGHT...NE winds 15 to 20 kt. Seas 6 to 9 ft. .THU...NE winds 10 to 15 kt. Seas 6 to 9 ft. .THU NIGHT...E winds less than 10 kt. Seas 5 to 7 ft. .FRI...S winds less than 10 kt, becoming SW 10 to 20 kt in the afternoon. Seas 5 to 7 ft. .FRI NIGHT...W winds 15 to 25 kt. Seas 7 to 10 ft. .SAT...NW winds 20 to 25 kt, diminishing to 10 to 20 kt in the afternoon. Seas 7 to 10 ft. .SAT NIGHT...N winds 10 to 15 kt. Seas 6 to 9 ft. .SUN...SE winds less than 10 kt. Seas 6 to 8 ft. .SUN NIGHT...SE winds 10 to 15 kt, shifting to S 15 to 25 kt after midnight. Seas 6 to 8 ft. ATLC waters from 27N to 31N between 65W and 77W .TODAY...N winds 15 to 25 kt W of 70W, and NW 20 to 30 kt elsewhere. W of 70W, seas 7 to 10 ft, building to 8 to 13 ft in the afternoon. Elsewhere, seas 11 to 16 ft. .TONIGHT...N winds 15 to 25 kt W of 70W, and NW 20 to 30 kt elsewhere. Seas 9 to 14 ft W of 70W, and 13 to 16 ft elsewhere. .THU...N winds 10 to 20 kt W of 70W, and NW 15 to 25 kt elsewhere. Seas 8 to 13 ft W of 70W, and 11 to 15 ft elsewhere. .THU NIGHT...N winds 10 to 20 kt W of 70W, and NW 15 to 25 kt elsewhere. Seas 8 to 11 ft W of 70W, and 10 to 13 ft elsewhere. .FRI...NW winds 10 to 20 kt. Seas 8 to 13 ft. .FRI NIGHT...SW winds 15 to 25 kt. Seas 8 to 11 ft. .SAT...W winds 20 to 30 kt. Seas 9 to 12 ft. .SAT NIGHT...NW winds 15 to 25 kt. Seas 9 to 14 ft. .SUN...N winds 10 to 20 kt. Seas 10 to 15 ft. .SUN NIGHT...N winds less than 10 kt, shifting to S after midnight. Seas 10 to 15 ft. Bahamas N of 22N .TODAY...N winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 ft or less. .TONIGHT...NE winds 10 to 20 kt. Seas 3 to 5 ft. .THU...NE winds 10 to 15 kt. Seas 4 to 6 ft. .THU NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. .FRI...E winds 10 to 15 kt, diminishing to less than 10 kt 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...SW winds 10 to 15 kt. Seas 4 to 6 ft. .SAT NIGHT...NW winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Seas 4 to 6 ft. .SUN...NE winds less than 10 kt. Seas 3 to 5 ft. .SUN NIGHT...E winds less than 10 kt, shifting to SE after midnight. Seas 3 to 5 ft. ATLC waters from 22N to 27N between 65W and the Bahamas .TODAY...NW winds 10 to 20 kt. Seas 5 to 7 ft W of 70W, and 7 to 10 ft elsewhere. .TONIGHT...N winds 10 to 20 kt W of 70W, and NW 15 to 25 kt elsewhere. Seas 8 to 11 ft W of 70W, and 8 to 13 ft elsewhere. .THU...N winds 10 to 20 kt W of 70W, and NW 15 to 20 kt elsewhere. Seas 9 to 14 ft. .THU NIGHT...N winds 10 to 15 kt W of 70W, and N 15 to 20 kt elsewhere. Seas 8 to 12 ft. .FRI...N winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 8 to 11 ft. .FRI NIGHT...Variable winds less than 10 kt, becoming S 10 to 15 kt 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...E winds less than 10 kt. Seas 8 to 11 ft. ATLC waters S of 22N W of 65W .TODAY...NW winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 3 to 5 ft. .TONIGHT...N winds 10 to 20 kt. Seas 4 to 6 ft. .THU...N winds 10 to 20 kt. Seas 6 to 9 ft. .THU NIGHT...N winds 10 to 15 kt. Seas 6 to 9 ft. .FRI...N winds 10 to 15 kt, shifting to NE in the afternoon. Seas 6 to 8 ft. .FRI NIGHT...E winds less than 10 kt. Seas 5 to 7 ft. .SAT...SW 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 4 to 6 ft. ATLC waters from 19N to 22N between 55W and 65W .TODAY...W winds 10 to 20 kt. Seas 6 to 9 ft. .TONIGHT...W winds 10 to 20 kt. Seas 7 to 10 ft. .THU...NW winds 10 to 20 kt. Seas 8 to 12 ft. .THU NIGHT...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 in the evening, becoming variable winds less than 10 kt. Seas 8 to 11 ft. .SAT...Variable winds less than 10 kt. Seas 9 to 11 ft. .SAT NIGHT...S winds 10 kt. Seas 9 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.