000 FZNT31 KNHC 161500 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1100 AM EDT Thu Mar 16 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 weak surface ridge extends from the E central Atlantic to the NE Caribbean and will shift NE through the weekend, as a cold front sinks S-SE across the northern basin. The front extends from the Windward Passage to N Belize this morning, and will reach from the northern Leeward Islands to the central Caribbean along 17N Fri morning, then become aligned E to W along 15N Sat before gradually dissipating by Sun. Strong winds will follow the front, locally higher in Atlantic passages, with large N swell spreading through Atlantic passages early Fri through Sat. Another front is expected to move slowly SE through the SE Gulf Sun and stall across the Yucatan Channel Mon night. NW Caribbean W of 85W .THIS AFTERNOON...E winds 10 to 20 kt. Seas 4 to 6 ft. .TONIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .FRI...SE winds 10 to 20 kt. Seas 5 to 7 ft. .FRI NIGHT...SE winds 10 to 20 kt. Seas 5 to 7 ft. .SAT...SE winds 10 to 20 kt. Seas 4 to 6 ft. .SAT NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. .SUN...S winds 10 to 15 kt. Seas 4 to 6 ft. .SUN NIGHT...SE winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Seas 4 to 6 ft. .MON...S winds less than 10 kt, shifting to NW in the afternoon. Seas 4 to 6 ft. .MON NIGHT...E winds less than 10 kt. Seas 4 to 6 ft. Caribbean N of 15N between 72W and 85W .THIS AFTERNOON...E winds less than 10 kt S of 18N, and NE 15 to 25 kt elsewhere. Seas 4 to 6 ft. .TONIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .FRI...E winds 10 to 20 kt. Seas 5 to 7 ft. .FRI NIGHT...SE winds 10 to 20 kt. Seas 5 to 7 ft. .SAT...SE winds 10 to 20 kt. Seas 5 to 7 ft. .SAT NIGHT...SE winds 10 to 20 kt. Seas 5 to 7 ft. .SUN...SE winds 10 to 15 kt. Seas 5 to 7 ft. .SUN NIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft. .MON...SE winds 10 to 15 kt. Seas 4 to 6 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. Caribbean from 11N to 15N W of 72W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 4 to 6 ft. .TONIGHT...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. .FRI...E winds 10 to 20 kt. Seas 4 to 6 ft. .FRI NIGHT...E winds 20 to 25 kt within 90 nm of coast of Colombia, and E 10 to 20 kt elsewhere. Seas 5 to 7 ft. .SAT...E winds 10 to 20 kt. Seas 5 to 7 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .SUN...E winds 10 to 20 kt. Seas 5 to 7 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .MON...E winds 10 to 20 kt. Seas 5 to 7 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. SW Caribbean S of 11N .THIS AFTERNOON...N winds less than 10 kt. Seas 3 to 4 ft. .TONIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. .FRI...NE winds 10 to 15 kt. Seas 4 to 6 ft. .FRI NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 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 less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 4 to 6 ft. .SUN...N winds less than 10 kt. Seas 5 to 7 ft. .SUN NIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft. .MON...NE winds less than 10 kt. Seas 5 to 7 ft. .MON NIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft. Caribbean between 64W and 72W .THIS AFTERNOON...SE winds 10 to 15 kt. Seas 3 to 5 ft Gulf of Venezuela, and 4 to 6 ft elsewhere. .TONIGHT...NE winds 10 to 20 kt Gulf of Venezuela, and E 10 to 15 kt elsewhere. Seas 4 to 6 ft. .FRI...E winds 15 to 20 kt Gulf of Venezuela, and E 10 to 20 kt elsewhere. Seas 3 to 4 ft Gulf of Venezuela, and 5 to 7 ft elsewhere. .FRI NIGHT...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 8 ft elsewhere. .SAT...E winds 10 to 20 kt. Seas 6 to 9 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft. .SUN...E winds 10 to 20 kt. Seas 6 to 8 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft. .MON...E winds 10 to 20 kt. Seas 6 to 8 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 6 to 7 ft. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .THIS AFTERNOON...SE winds less than 10 kt. Seas 5 to 7 ft. .TONIGHT...S winds less than 10 kt, shifting to N after midnight. Seas 5 to 7 ft. .FRI...NE winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 6 to 9 ft. .FRI NIGHT...NE winds 10 to 20 kt. Seas 7 to 10 ft. .SAT...NE winds 10 to 20 kt. Seas 8 to 11 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 8 to 11 ft. .SUN...E winds 10 to 20 kt. Seas 8 to 11 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 7 to 10 ft. .MON...E winds 10 to 20 kt. Seas 7 to 10 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 7 to 10 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 6 to 9 ft. .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...NE winds 10 to 20 kt. Seas 5 to 7 ft. .SAT...E winds 10 to 20 kt. Seas 6 to 9 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 7 to 10 ft. .SUN...E winds 10 to 20 kt. Seas 7 to 10 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 7 to 10 ft. .MON...E winds 10 to 20 kt. Seas 7 to 10 ft. .MON 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 30N55W to 20N71W. The front will continue moving SE and reach from 20N55W through the northern Leeward Islands by Fri morning. Strong to gale-force NW winds immediately behind the front will shift across the SE waters through tonight. Large N swell will accompany this front, with seas of 12 ft or greater spreading to 21N and E of 76W. The next cold front is expected to move off NE Florida late Sat, with fresh to strong southerly winds ahead of it Fri evening through Sat. This front is expected to reach from 31N72W to S Florida late Sun before stalling. ATLC waters from 27N to 31N W of 77W .THIS AFTERNOON...NE winds 10 to 15 kt, shifting to E in the afternoon. Seas 5 to 7 ft. .TONIGHT...SE winds less than 10 kt, shifting to S after midnight. Seas 4 to 6 ft. .FRI...S winds 10 to 20 kt. Seas 4 to 6 ft. .FRI NIGHT...S winds 15 to 25 kt. Seas 6 to 9 ft. .SAT...SW winds 15 to 25 kt. Seas 6 to 9 ft. .SAT NIGHT...W winds 10 to 20 kt. Seas 6 to 8 ft. .SUN...N winds 10 to 15 kt. Seas 4 to 6 ft. .SUN NIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft. .MON...E winds 15 to 25 kt. Seas 7 to 10 ft. .MON NIGHT...NE winds 15 to 25 kt. Seas 8 to 11 ft. ATLC waters from 27N to 31N between 65W and 77W .THIS AFTERNOON...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 12 to 16 ft elsewhere. .TONIGHT...W of 70W, N winds 10 to 15 kt, shifting to NE after midnight. Elsewhere, N winds 15 to 25 kt. Seas 8 to 11 ft W of 70W, and 11 to 16 ft elsewhere. .FRI...W of 70W, S winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Elsewhere, N winds 10 to 15 kt, shifting to NW in the afternoon. Seas 7 to 10 ft W of 70W, and 9 to 14 ft elsewhere. .FRI NIGHT...W of 70W, S winds 10 to 20 kt. Elsewhere, NW winds less than 10 kt, shifting to S after midnight. Seas 6 to 8 ft W of 70W, and 8 to 11 ft elsewhere. .SAT...S winds 10 to 20 kt. Seas 6 to 9 ft. .SAT NIGHT...S winds 10 to 20 kt. Seas 6 to 9 ft. .SUN...S winds 10 to 20 kt. Seas 6 to 8 ft. .SUN NIGHT...S winds 10 to 15 kt. Seas 6 to 8 ft. .MON...S winds 10 to 15 kt. Seas 6 to 9 ft. .MON NIGHT...S winds 10 to 15 kt. Seas 7 to 10 ft. Bahamas N of 22N .THIS AFTERNOON...NE winds 10 to 20 kt. Seas 5 to 7 ft. .TONIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .FRI...SE winds 10 to 20 kt. Seas 4 to 6 ft. .FRI NIGHT...SE winds 10 to 20 kt. Seas 4 to 6 ft. .SAT...SE winds 10 to 15 kt. Seas 4 to 6 ft. .SAT NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. .SUN...S winds 10 to 15 kt. Seas 3 to 5 ft. .SUN NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. .MON...S winds 10 to 15 kt. Seas 3 to 4 ft. .MON NIGHT...SW winds less than 10 kt. Seas 3 to 4 ft. ATLC waters from 22N to 27N between 65W and the Bahamas ...GALE WARNING TODAY... .THIS AFTERNOON...NW winds 20 to 35 kt becoming N winds 15 to 25 kt late. W of 70W, seas 8 to 11 ft. Elsewhere, seas 8 to 11 ft, building to 11 to 13 ft in the afternoon. .TONIGHT...NE winds 10 to 20 kt. Seas 8 to 11 ft W of 70W, and 11 to 14 ft elsewhere. .FRI...E winds 10 to 15 kt. Seas 7 to 10 ft W of 70W, and 9 to 13 ft elsewhere. .FRI NIGHT...E winds 10 to 15 kt. Seas 8 to 11 ft. .SAT...SE winds 10 to 15 kt. Seas 6 to 9 ft. .SAT NIGHT...SE winds 10 to 15 kt. Seas 6 to 8 ft. .SUN...SE winds 10 to 15 kt. Seas 6 to 8 ft. .SUN NIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft. .MON...SE winds 10 to 15 kt. Seas 5 to 7 ft. .MON NIGHT...S winds 10 to 15 kt. Seas 5 to 7 ft. ATLC waters S of 22N W of 65W .THIS AFTERNOON...N winds 15 to 25 kt. Seas 7 to 10 ft. .TONIGHT...NE winds 15 to 25 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. .SAT...E winds 10 to 20 kt. Seas 6 to 9 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft. .SUN...E winds 10 to 20 kt. Seas 5 to 7 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .MON...SE winds 10 to 20 kt. Seas 5 to 7 ft. .MON NIGHT...SE winds 10 to 20 kt. Seas 5 to 7 ft. ATLC waters from 19N to 22N between 55W and 65W .THIS AFTERNOON...SW winds 10 to 20 kt. Seas 6 to 7 ft. .TONIGHT...NW winds 10 to 20 kt. Seas 7 to 10 ft. .FRI...N winds 10 to 20 kt. Seas 8 to 12 ft. .FRI NIGHT...NE winds 15 to 20 kt. Seas 10 to 11 ft. .SAT...E winds 15 to 20 kt. Seas 10 to 11 ft. .SAT NIGHT...E winds 15 to 20 kt. Seas 9 to 11 ft. .SUN...E winds 15 to 20 kt. Seas 8 to 10 ft. .SUN NIGHT...E winds 15 to 20 kt. Seas 8 to 10 ft. .MON...E winds 15 to 20 kt. Seas 7 to 10 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 7 to 9 ft.