000 FZNT31 KNHC 190813 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 413 AM EDT Mon May 19 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...1017 mb high pressure centered just NE of the Bahamas extends a weak ridge into the NE Gulf of America, while a surface trough extends from the Atlantic near 28N64W to Puerto Rico. This pattern will yield generally moderate trades across the basin W of 75W through Tue, except for fresh to strong E to SE winds pulsing during the late afternoon through night across the Gulf of Honduras throughout the week. Moderate to locally fresh trades will prevail across the basin E of 75W through Tue. The surface trough N of Puerto Rico will weaken and drift NE during the next few days, and gradually allow high pressure to strengthen north of the basin. Look for increasing trades and building seas across the eastern part of the basin beginning Tue night, expanding westward to the central part of the basin by Wed night, and to most of the western Caribbean starting Thu night. NW Caribbean W of 85W .TODAY...SE winds 10 to 20 kt. Seas 4 to 6 ft. .TONIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .TUE...SE winds 10 to 20 kt. Seas 5 to 7 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .WED...SE winds 10 to 20 kt. Seas 5 to 7 ft. .WED NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .THU...E winds 10 to 20 kt. 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 4 to 6 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. Caribbean N of 15N between 72W and 85W .TODAY...E winds 10 to 15 kt. Seas 3 to 5 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...E winds 10 to 15 kt. Seas 3 to 5 ft. .WED...E winds 10 to 15 kt. Seas 3 to 5 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .THU...E winds 10 to 15 kt. 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 4 to 6 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. Caribbean from 11N to 15N W of 72W .TODAY...E winds 10 to 15 kt. Seas 3 to 5 ft. .TONIGHT...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. .TUE...E winds 10 to 20 kt. Seas 4 to 6 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .WED...E winds 10 to 20 kt. Seas 4 to 6 ft. .WED NIGHT...E 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 15 to 25 kt. Seas 6 to 9 ft. .FRI...E winds 15 to 25 kt. Seas 6 to 9 ft. .FRI NIGHT...E winds 15 to 25 kt. Seas 6 to 9 ft. SW Caribbean S of 11N .TODAY...E winds less than 10 kt. Seas 3 to 4 ft. .TONIGHT...NE winds less than 10 kt. Seas 3 to 4 ft. .TUE...NE winds less than 10 kt. Seas 3 to 4 ft. .TUE NIGHT...NE winds less than 10 kt. Seas 3 to 4 ft. .WED...E winds less than 10 kt. Seas 3 to 5 ft. .WED NIGHT...NE winds less than 10 kt. Seas 3 to 5 ft. .THU...NE winds less than 10 kt. Seas 3 to 5 ft. .THU NIGHT...NE winds less than 10 kt. Seas 4 to 6 ft. .FRI...NE winds less than 10 kt. Seas 5 to 7 ft. .FRI NIGHT...NE winds less than 10 kt. Seas 5 to 7 ft. Caribbean between 64W and 72W .TODAY...Gulf of Venezuela, E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Elsewhere, E winds 10 to 15 kt. Seas 3 to 4 ft Gulf of Venezuela, and 4 to 6 ft elsewhere. .TONIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft Gulf of Venezuela, and 4 to 6 ft elsewhere. .TUE...E winds 10 to 20 kt. Seas 3 to 4 ft Gulf of Venezuela, and 4 to 6 ft elsewhere. .TUE NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .WED...E winds 10 to 20 kt. Seas 5 to 7 ft. .WED NIGHT...E 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...E winds 10 to 20 kt. Seas 5 to 7 ft. .FRI 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 5 to 7 ft. .TONIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .TUE...E winds 10 to 15 kt. Seas 5 to 7 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .WED...E winds 10 to 15 kt. Seas 4 to 6 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 ft. .THU NIGHT...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...E winds 10 to 20 kt. Seas 5 to 7 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .TODAY...E winds 10 to 15 kt. Seas 5 to 7 ft. .TONIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .TUE...E winds 10 to 15 kt. Seas 5 to 7 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 5 to 7 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 5 to 7 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .FRI...E winds 10 to 15 kt. Seas 5 to 7 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...Deep-layered low pressure extends from 25N62W across Puerto Rico and into the NE Caribbean, and is supporting scattered showers and thunderstorms S of 27N between 55W and 62W. An associated surface trough also persists in this same area, while 1017 mb high pressure is just NE of the Bahamas. This middle to upper-level low pressure will gradually weaken through Tue as it shifts eastward, allowing for the surface trough to weaken and shift NE, and showers and thunderstorms shifting eastward ahead of it. High pressure located to the W of the trough along 62W will support light to gentle winds over most of the area W of 63W through the period, except for moderate westerly winds N of 29N. Moderate to fresh NE to E winds will pulse north of Hispaniola and in the Windward Passage each night for the next few days. Looking ahead, fresh to strong SW to W winds and building seas are expected over the NW portion of the area and northeast of the Bahamas Wed, ahead of a cold front moving off the southeastern United States coast Wed night. The front will reach from near 31N70W to the NW Bahamas by late Thu, then weaken as it reaches from near 31N68W to just E of the NW Bahamas by Sat morning. ATLC waters from 27N to 31N W of 77W .TODAY...SW winds less than 10 kt. Seas 3 ft. .TONIGHT...S winds less than 10 kt. Seas 3 ft. .TUE...SW winds 10 kt. Seas 3 ft. .TUE NIGHT...S winds 10 to 20 kt. Seas 3 to 4 ft. .WED...SW winds 10 to 15 kt. Seas 3 to 5 ft. .WED NIGHT...SW winds 10 to 15 kt. Seas 3 to 5 ft. .THU...NW winds 10 to 15 kt. Seas 3 to 5 ft. .THU NIGHT...SW winds less than 10 kt. Seas 3 to 5 ft. .FRI...W winds less than 10 kt. Seas 3 to 4 ft. .FRI NIGHT...W winds less than 10 kt in the evening, becoming variable winds less than 10 kt. Seas 3 to 4 ft. ATLC waters from 27N to 31N between 65W and 77W .TODAY...W winds 10 to 15 kt. Seas 4 to 6 ft. .TONIGHT...W winds 10 to 15 kt. Seas 4 to 6 ft. .TUE...W winds less than 10 kt W of 70W, and W 10 to 15 kt elsewhere. Seas 4 to 6 ft. .TUE NIGHT...W winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Seas 4 to 6 ft. .WED...SW winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 4 to 5 ft. .WED NIGHT...SW winds 10 to 15 kt. Seas 4 to 6 ft. .THU...SW winds 10 to 15 kt. Seas 5 to 7 ft. .THU NIGHT...SW winds 10 to 15 kt. Seas 5 to 7 ft. .FRI...SW winds 10 to 15 kt. Seas 5 to 7 ft. .FRI NIGHT...SW winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Seas 4 to 6 ft. Bahamas N of 22N .TODAY...SE winds less than 10 kt. Seas 2 ft or less. .TONIGHT...E winds less than 10 kt, shifting to SE after midnight. Seas 2 ft or less. .TUE...SE winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 2 ft or less. .TUE NIGHT...E winds less than 10 kt, shifting to SE after midnight. Seas 2 ft or less. .WED...S winds less than 10 kt. Seas 2 ft or less. .WED NIGHT...SE winds less than 10 kt. Seas 2 ft or less. .THU...SE winds less than 10 kt. Seas 2 ft or less. .THU NIGHT...SE winds less than 10 kt. Seas 2 ft or less. .FRI...SE winds less than 10 kt. Seas 2 ft or less. .FRI NIGHT...E winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft after midnight. ATLC waters from 22N to 27N between 65W and the Bahamas .TODAY...Variable winds less than 10 kt. Seas 3 to 5 ft. .TONIGHT...Variable winds less than 10 kt. Seas 3 to 5 ft. .TUE...SW winds less than 10 kt. Seas 3 to 5 ft. .TUE NIGHT...N winds less than 10 kt, shifting to E after midnight. Seas 3 to 5 ft. .WED...S winds less than 10 kt. Seas 3 to 4 ft. .WED NIGHT...Variable winds less than 10 kt, becoming SE less than 10 kt after midnight. Seas 3 to 4 ft. .THU...S winds 10 kt. Seas 3 to 4 ft. .THU NIGHT...SE winds 10 kt. Seas 3 to 4 ft. .FRI...S winds less than 10 kt. Seas 3 to 4 ft. .FRI NIGHT...SE winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 to 5 ft. ATLC waters S of 22N W of 65W .TODAY...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 to 5 ft. .TONIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .TUE...E winds less than 10 kt. Seas 3 to 4 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .WED...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 to 4 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .THU...E winds 10 to 15 kt. Seas 3 to 4 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .FRI...E winds 10 to 15 kt. Seas 3 to 5 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. ATLC waters from 19N to 22N between 55W and 65W .TODAY...SE winds 10 to 15 kt. Seas 5 to 7 ft. .TONIGHT...SE winds less than 10 kt. Seas 5 to 6 ft. .TUE...SE winds less than 10 kt. Seas 5 to 6 ft. .TUE NIGHT...SE winds less than 10 kt. Seas 4 to 5 ft. .WED...SE winds less than 10 kt. Seas 4 to 5 ft. .WED NIGHT...E winds less than 10 kt. Seas 4 to 5 ft. .THU...E winds 10 to 15 kt. Seas 4 to 5 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .FRI...E winds 10 to 15 kt. Seas 5 to 6 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft.