000 FZNT31 KNHC 150905 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 505 AM EDT Wed Mar 15 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...1020 mb high pressure across the central Atlantic extends a weak and narrow ridge W-SW to the Turks and Caicos Islands. The ridge will shift NE through the rest of the week as a cold front sinks slowly S-SE across the northwestern basin this evening, reaches from the Windward Passage to Belize on Thu, and then from the northern Leeward Islands to the central Caribbean along 17N Fri. 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 stall near or just N of the Yucatan Channel on Sun. NW Caribbean W of 85W .TODAY...E winds 10 to 15 kt, shifting to NE in the afternoon. Seas 3 to 5 ft. .TONIGHT...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...E winds 10 to 20 kt. Seas 5 to 7 ft. .FRI...SE winds 10 to 20 kt. Seas 5 to 7 ft. .FRI NIGHT...SE winds 10 to 20 kt. Seas 4 to 6 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 3 to 5 ft. .SUN NIGHT...SE winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 4 to 6 ft. Caribbean N of 15N between 72W and 85W .TODAY...E winds 10 to 15 kt S of 18N, and E less than 10 kt elsewhere. Seas 3 to 5 ft. .TONIGHT...S of 18N, E winds less than 10 kt. Elsewhere, N winds less than 10 kt, becoming NE 10 to 20 kt after midnight. Seas 3 to 5 ft. .THU...E winds less than 10 kt S of 18N, and NE 10 to 20 kt elsewhere. Seas 4 to 6 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 4 to 6 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 20 kt. Seas 5 to 7 ft. .SUN NIGHT...SE winds 10 to 20 kt. Seas 5 to 7 ft. Caribbean from 11N to 15N W of 72W .TODAY...E winds 10 to 20 kt within 90 nm of coast of Colombia, and E 10 to 15 kt elsewhere. Seas 4 to 6 ft. .TONIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. .THU...NE winds 10 to 15 kt. Seas 4 to 6 ft. .THU NIGHT...NE winds 10 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 10 to 20 kt. 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 6 to 8 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft. SW Caribbean S of 11N .TODAY...NE winds less than 10 kt. Seas 3 to 5 ft. .TONIGHT...NE winds less than 10 kt. Seas 3 to 5 ft. .THU...N winds less than 10 kt. Seas 3 to 5 ft. .THU NIGHT...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. Seas 4 to 6 ft. .SUN...NE winds less than 10 kt. Seas 5 to 7 ft. .SUN NIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft. Caribbean between 64W and 72W .TODAY...E winds 10 to 20 kt. Seas 3 to 5 ft Gulf of Venezuela, and 5 to 7 ft elsewhere. .TONIGHT...E winds 15 to 25 kt Gulf of Venezuela, and E 10 to 20 kt elsewhere. Seas 5 to 7 ft. .THU...SE winds 10 to 20 kt. Seas 3 to 5 ft Gulf of Venezuela, and 5 to 7 ft elsewhere. .THU NIGHT...NE winds 10 to 20 kt Gulf of Venezuela, and E 10 to 15 kt elsewhere. Seas 4 to 6 ft. .FRI...E winds 10 to 20 kt. Seas 5 to 7 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft. .SAT...E winds 10 to 20 kt. Seas 6 to 8 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. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .TODAY...E winds 10 to 15 kt. Seas 6 to 9 ft. .TONIGHT...E winds less than 10 kt. Seas 6 to 8 ft. .THU...SE winds 10 to 15 kt. Seas 5 to 7 ft. .THU NIGHT...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 15 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. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .TODAY...E winds 10 to 20 kt. Seas 6 to 9 ft. .TONIGHT...E winds 10 to 15 kt. Seas 6 to 9 ft. .THU...E winds 10 to 15 kt. Seas 6 to 9 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .FRI...NE winds 10 to 15 kt. Seas 5 to 7 ft. .FRI NIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft. .SAT...NE 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. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...A cold front extending from 31N58W through the Central Bahamas to NW Cuba will move SE and reach from 31N57W to central Cuba this evening, from near 30N55W to the Windward Passage Thu morning, and from 20N55W through the Leeward Islands by Fri morning. Strong to gale-force northerly winds immediately behind the front will move through the Central and SE Bahamas Wed night, and then shift across the SE waters and into the Caribbean Islands Thu and Thu night. Large N swell will accompany this front, with seas of 12 ft or greater N of 22N and E of 73W. Yet another cold front is expected to move off NE Florida late Sat, with fresh to strong southerly winds ahead of it Fri evening through Sat. That front is expected to reach from 31N70W to S Florida late Sun before stalling. ATLC waters from 27N to 31N W of 77W .TODAY...N winds 10 to 20 kt. Seas 7 to 9 ft. .TONIGHT...N winds 10 to 20 kt. Seas 6 to 8 ft. .THU...NE winds 10 to 15 kt. Seas 5 to 7 ft. .THU NIGHT...SE winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 4 to 6 ft. .FRI...S winds 10 to 20 kt. Seas 4 to 6 ft. .FRI NIGHT...S winds 20 to 30 kt. Seas 6 to 9 ft. .SAT...SW winds 20 to 30 kt. Seas 7 to 10 ft. .SAT NIGHT...W winds 10 to 20 kt. Seas 6 to 9 ft. .SUN...N winds 10 to 20 kt. Seas 5 to 7 ft. .SUN NIGHT...NE winds 10 to 20 kt. Seas 6 to 8 ft. ATLC waters from 27N to 31N between 65W and 77W .TODAY...NW winds 15 to 25 kt. Seas 8 to 13 ft. .TONIGHT...NW winds 15 to 25 kt. Seas 9 to 14 ft. .THU...N winds 15 to 25 kt W of 70W, and NW 15 to 25 kt elsewhere. Seas 8 to 13 ft W of 70W, and 11 to 16 ft elsewhere. .THU NIGHT...W of 70W, N winds 10 to 15 kt, shifting to NE after midnight. Elsewhere, N winds 20 to 25 kt, diminishing to 10 to 20 kt after midnight. Seas 8 to 11 ft W of 70W, and 11 to 15 ft elsewhere. .FRI...N winds 10 to 15 kt, shifting to SW in the afternoon. Seas 8 to 11 ft. .FRI NIGHT...S winds 10 to 20 kt. Seas 7 to 10 ft. .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 20 kt. Seas 6 to 8 ft. Bahamas N of 22N .TODAY...NE winds 10 to 20 kt. Seas 3 to 5 ft. .TONIGHT...NE winds 15 to 25 kt. Seas 5 to 7 ft. .THU...NE winds 15 to 25 kt. Seas 5 to 7 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 5 to 7 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 20 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...SE winds 10 to 15 kt. Seas 3 to 4 ft. ATLC waters from 22N to 27N between 65W and the Bahamas ...GALE WARNING... .TODAY...W winds 10 to 15 kt. Seas 7 to 9 ft. .TONIGHT...N winds 15 to 25 kt W of 70W, and N 10 to 20 kt elsewhere. Seas 7 to 10 ft. .THU...NW to N winds 25 to 35 kt immediately behind the front, becoming N winds 15 to 25 kt. Seas 8 to 12 ft. .THU NIGHT...W of 70W, NE winds 10 to 20 kt. Elsewhere, N winds 20 to 25 kt, diminishing to 10 to 20 kt after midnight. Seas 8 to 11 ft W of 70W, and 11 to 13 ft elsewhere. .FRI...E winds 10 to 15 kt. Seas 8 to 12 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 7 to 10 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. ATLC waters S of 22N W of 65W ...GALE WARNING... .TODAY...SE winds less than 10 kt, shifting to S in the afternoon. Seas 5 to 7 ft. .TONIGHT...S winds less than 10 kt, shifting to SW after midnight. Seas 4 to 6 ft. .THU...NW to N winds 25 to 35 kt immediately behind the front, becoming N winds 20 to 25 kt. Seas 5 to 7 ft, building to 7 to 11 ft in the afternoon. .THU NIGHT...NE winds 15 to 25 kt. Seas 7 to 10 ft. .FRI...E winds 15 to 20 kt. Seas 7 to 10 ft. .FRI NIGHT...E winds 15 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...SE winds 10 to 20 kt. Seas 5 to 7 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. ATLC waters from 19N to 22N between 55W and 65W ...GALE WARNING... .TODAY...SE winds 10 kt. Seas 7 to 9 ft. .TONIGHT...S winds 10 kt. Seas 6 to 8 ft. .THU...S winds 10 to 20 kt. Seas 6 to 7 ft. .THU NIGHT...NW to N winds 25 to 35 kt immediately behind the front, becoming NW winds 20 kt. Seas 8 to 11 ft. .FRI...N winds 10 to 20 kt. Seas 8 to 11 ft. .FRI NIGHT...NE winds 15 to 20 kt. Seas 10 to 11 ft. .SAT...E winds 15 to 20 kt. Seas 9 to 11 ft. .SAT NIGHT...E winds 15 to 20 kt. Seas 9 to 11 ft. .SUN...E winds 15 to 20 kt. Seas 9 to 11 ft. .SUN NIGHT...E winds 15 to 20 kt. Seas 8 to 10 ft.