000 FZNT31 KNHC 181815 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 115 PM EST Wed Dec 18 2019 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...High pressure north of the region will maintain fresh to strong trade winds and building seas from the tropical north Atlantic westward, to the south central Caribbean through Sat. A strong cold front will move into the Yucatan Channel this afternoon with gale force northerly winds immediately behind it through the Yucatan Channel through this evening. The front will stall and weaken from central Cuba to Honduras by Thursday night. Fresh to strong northerly winds will accompany the front across the NW Caribbean Sea. NW Caribbean W of 85W ...GALE WARNING... .TONIGHT...N winds 20 to 35 kt diminishing to 20 to 25 kt late. Seas 7 to 12 ft. .THU...N winds 15 to 25 kt. Seas 8 to 11 ft. .THU NIGHT...N winds 10 to 20 kt. Seas 7 to 10 ft. .FRI...NE winds 10 to 15 kt. Seas 5 to 7 ft. .FRI NIGHT...NE winds less than 10 kt. Seas 4 to 6 ft. .SAT...NW winds 10 to 15 kt. Seas 4 to 5 ft. .SAT NIGHT...NW winds 10 to 20 kt. Seas 4 to 5 ft. .SUN...NW winds 10 to 20 kt. Seas 5 to 7 ft. .SUN NIGHT...NW winds 10 to 20 kt. Seas 5 to 7 ft. .MON...NW winds 10 to 20 kt. Seas 6 to 9 ft. .MON NIGHT...NW winds 10 to 20 kt. Seas 6 to 9 ft. Caribbean N of 15N between 72W and 85W .TONIGHT...S of 18N, E winds 10 to 20 kt. Elsewhere, NE winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 5 to 7 ft. .THU...NE winds 10 to 20 kt. Seas 5 to 7 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft S of 18N, and 4 to 6 ft elsewhere. .FRI...E winds 10 to 20 kt. Seas 6 to 9 ft S of 18N, and 3 to 5 ft elsewhere. .FRI NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .SAT...E winds 10 to 20 kt. Seas 6 to 8 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...N winds 10 to 20 kt. Seas 5 to 7 ft. .MON...N winds 10 to 20 kt. Seas 5 to 7 ft. .MON NIGHT...NW winds 10 to 20 kt. Seas 5 to 7 ft. Caribbean from 11N to 15N W of 72W .TONIGHT...E winds 15 to 25 kt within 90 nm of coast of Colombia, and NE 10 to 20 kt elsewhere. Seas 6 to 9 ft. .THU...E winds 15 to 25 kt within 90 nm of coast of Colombia, and E 10 to 20 kt elsewhere. Seas 7 to 10 ft. .THU NIGHT...E winds 20 to 25 kt within 90 nm of coast of Colombia, and NE 15 to 25 kt elsewhere. Seas 7 to 10 ft. .FRI...E winds 20 to 25 kt within 90 nm of coast of Colombia, and E 15 to 25 kt elsewhere. Seas 7 to 10 ft. .FRI NIGHT...NE winds 15 to 25 kt. Seas 8 to 11 ft. .SAT...E winds 15 to 25 kt. Seas 8 to 11 ft. .SAT NIGHT...NE winds 15 to 25 kt. Seas 8 to 11 ft. .SUN...NE winds 10 to 20 kt. Seas 8 to 11 ft. .SUN NIGHT...NE winds 10 to 20 kt. Seas 6 to 9 ft. .MON...NE winds 10 to 20 kt. Seas 6 to 9 ft. .MON NIGHT...NE winds 15 to 25 kt. Seas 6 to 9 ft. SW Caribbean S of 11N .TONIGHT...N winds less than 10 kt. Seas 4 to 6 ft. .THU...NE winds 10 to 15 kt, shifting to N in the afternoon. Seas 5 to 7 ft. .THU NIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft. .FRI...NE winds 10 to 15 kt. 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 7 to 10 ft. .SAT NIGHT...NE winds 10 to 15 kt. Seas 7 to 10 ft. .SUN...N winds 10 to 15 kt. Seas 6 to 9 ft. .SUN NIGHT...N winds 10 to 15 kt. Seas 6 to 8 ft. .MON...N winds 10 to 15 kt. Seas 5 to 7 ft. .MON NIGHT...N winds 10 to 20 kt. Seas 5 to 7 ft. Caribbean between 64W and 72W .TONIGHT...E winds 20 to 25 kt Gulf of Venezuela, and E 10 to 20 kt elsewhere. Seas 3 to 5 ft Gulf of Venezuela, and 7 to 9 ft elsewhere. .THU...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 9 ft elsewhere. .THU NIGHT...E winds 20 to 25 kt Gulf of Venezuela, and E 10 to 20 kt elsewhere. Seas 3 to 5 ft Gulf of Venezuela, and 6 to 9 ft elsewhere. .FRI...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 9 ft elsewhere. .FRI NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft. .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 9 ft. .MON...E winds 10 to 20 kt. Seas 6 to 8 ft. .MON 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 .TONIGHT...E winds 10 to 20 kt. Seas 7 to 10 ft. .THU...E winds 10 to 20 kt. Seas 7 to 10 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft. .FRI...E winds 10 to 15 kt. Seas 6 to 8 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 6 to 8 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 6 to 8 ft. .MON...E winds 10 to 15 kt. Seas 6 to 8 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .TONIGHT...E winds 15 to 25 kt. Seas 8 to 11 ft. .THU...E winds 10 to 20 kt. Seas 8 to 11 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 7 to 10 ft. .FRI...E winds 10 to 20 kt. Seas 6 to 9 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 6 to 9 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 9 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft. .MON...E winds 10 to 20 kt. Seas 6 to 9 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...A strong cold front from 31N77W to the Florida coast along 28N, will reach from 31N69W to eastern Cuba tonight, and from 31N64W to eastern Cuba on Thursday morning, and from 26N65W across the Bahamas to the Windward Passage on Thursday night. Strong northerly winds and building seas are expected across much of the forecast waters following the frontal passage. The front will stall gradually, and weaken through Fri night. It is possible that fresh to strong easterly winds may develop to the east of Florida during the upcoming weekend. A low pressure center is forecast to develop in the eastern Gulf of Mexico, and move across northern Florida. ATLC waters from 27N to 31N W of 77W ...GALE CONDITIONS POSSIBLE... .TONIGHT...N winds 20 to 25 kt. Seas 7 to 10 ft. .THU...NE winds 20 to 25 kt. Seas 8 to 11 ft. .THU NIGHT...NE winds 15 to 25 kt. Seas 7 to 10 ft. .FRI...E winds 20 to 25 kt. Seas 8 to 11 ft. .FRI NIGHT...E winds 20 to 25 kt. Seas 8 to 11 ft. .SAT...E winds 20 to 25 kt. Seas 8 to 10 ft. .SAT NIGHT...E winds 20 to 30 kt. Seas 9 to 13 ft. .SUN...SE winds 25 to 35 kt. Seas 12 to 17 ft. .SUN NIGHT...S winds 20 to 30 kt, becoming SW 10 to 15 kt after midnight. Seas 12 to 17 ft. .MON...SW winds 10 to 20 kt. Seas 9 to 14 ft. .MON NIGHT...NW winds 10 to 20 kt. Seas 8 to 12 ft. ATLC waters from 27N to 31N between 65W and 77W ...GALE CONDITIONS POSSIBLE... .TONIGHT...N winds 15 to 25 kt W of 70W, and SW 10 to 20 kt elsewhere. Seas 7 to 10 ft. .THU...NE winds 20 to 30 kt W of 70W, and N 15 to 25 kt elsewhere. Seas 8 to 11 ft. .THU NIGHT...NE winds 15 to 25 kt. Seas 9 to 11 ft. .FRI...NE winds 15 to 25 kt. Seas 8 to 12 ft. .FRI NIGHT...NE winds 15 to 25 kt. Seas 8 to 11 ft. .SAT...E winds 15 to 20 kt. Seas 8 to 10 ft. .SAT NIGHT...E winds 15 to 25 kt. Seas 8 to 11 ft. .SUN...E winds 20 to 30 kt. Seas 8 to 13 ft. .SUN NIGHT...SE winds 20 to 30 kt. Seas 10 to 15 ft. .MON...S winds 15 to 25 kt. Seas 10 to 15 ft. .MON NIGHT...SW winds 10 to 20 kt. Seas 9 to 14 ft. Bahamas N of 22N .TONIGHT...N winds 10 to 15 kt. Seas 3 to 4 ft. .THU...NE winds 15 to 25 kt. Seas 5 to 7 ft. .THU NIGHT...NE 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. .SAT...E winds 15 to 25 kt. Seas 6 to 9 ft. .SAT NIGHT...SE winds 10 to 20 kt. Seas 5 to 7 ft. .SUN...S winds 10 to 20 kt. Seas 5 to 7 ft. .SUN NIGHT...SW winds 10 to 15 kt. Seas 4 to 6 ft. .MON...W winds 10 to 20 kt. Seas 4 to 6 ft. .MON NIGHT...W winds 10 to 20 kt. Seas 4 to 6 ft. ATLC waters from 22N to 27N between 65W and the Bahamas .TONIGHT...S winds 10 to 15 kt. Seas 6 to 8 ft. .THU...E winds 15 to 25 kt W of 70W, and S 10 to 15 kt elsewhere. Seas 8 to 11 ft W of 70W, and 6 to 7 ft elsewhere. .THU NIGHT...W of 70W, E winds 15 to 25 kt. Elsewhere, SE winds less than 10 kt, shifting to E after midnight. Seas 7 to 10 ft. .FRI...W of 70W, NE winds 15 to 25 kt. Elsewhere, E winds 10 to 15 kt, shifting to NE 15 to 25 kt in the afternoon. Seas 8 to 11 ft. .FRI NIGHT...NE winds 15 to 25 kt. Seas 8 to 13 ft. .SAT...E winds 15 to 25 kt. Seas 9 to 12 ft. .SAT NIGHT...E winds 15 to 20 kt. Seas 9 to 11 ft. .SUN...SE winds 10 to 20 kt. Seas 8 to 10 ft. .SUN NIGHT...SE winds 15 to 20 kt. Seas 8 to 11 ft. .MON...S winds 10 to 20 kt. Seas 8 to 11 ft. .MON NIGHT...SW winds 10 to 20 kt. Seas 7 to 10 ft. ATLC waters S of 22N W of 65W .TONIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft. .THU...SE winds 10 to 15 kt. Seas 4 to 6 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .FRI...E winds 10 to 15 kt. Seas 4 to 6 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 6 to 8 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 15 kt. Seas 6 to 8 ft. .SUN NIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft. .MON...S winds 10 to 15 kt. Seas 5 to 7 ft. .MON NIGHT...S winds 10 to 15 kt. Seas 4 to 6 ft. ATLC waters from 19N to 22N between 55W and 65W .TONIGHT...E winds 10 to 15 kt. Seas 7 to 9 ft. .THU...SE winds 10 to 20 kt. Seas 7 to 9 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 6 to 8 ft. .FRI...E winds 10 to 15 kt. Seas 6 to 7 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 6 to 7 ft. .SAT...E winds 10 to 15 kt. Seas 6 to 8 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 8 to 9 ft. .SUN...E winds 10 to 15 kt. Seas 8 to 9 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 8 to 9 ft. .MON...SE winds 10 to 15 kt. Seas 8 to 9 ft. .MON NIGHT...SE winds 10 to 15 kt. Seas 7 to 9 ft.