000 FZNT31 KNHC 171422 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1022 AM EDT Wed Mar 17 2021 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 weakening cold front has moved southward across the NE Caribbean islands overnight and will drift SE across the NE Caribbean through Thu. Strong tradewinds will prevail across the central Caribbean through Fri morning, with near gale-force winds expected near the coast of Colombia each night. Fresh to strong winds are expected in the Windward Passage tonight. SE winds will increase across the NW Caribbean through tonight, ahead of a cold front moving into the Gulf of Mexico. The front will stall and weaken near the Yucatan Channel Fri night and Sat. Large northerly swell will affect the Tropical N Atlantic waters and Caribbean Passages through Thu. NW Caribbean W of 85W .THIS AFTERNOON...SE winds 15 to 25 kt. Seas 6 to 8 ft. .TONIGHT...SE winds 15 to 25 kt. Seas 6 to 8 ft. .THU...SE winds 15 to 25 kt. Seas 6 to 8 ft. .THU NIGHT...SE winds 10 to 20 kt. Seas 4 to 6 ft. .FRI...E winds 10 to 15 kt. Seas 3 to 5 ft. .FRI NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. .SAT...N winds 10 to 15 kt. Seas 3 to 5 ft. .SAT NIGHT...N winds 10 to 15 kt. Seas 3 to 5 ft. .SUN...N winds 10 to 15 kt. Seas 3 to 5 ft. .SUN NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. Caribbean N of 15N between 72W and 85W .THIS AFTERNOON...E winds 15 to 25 kt S of 18N, and E 10 to 20 kt elsewhere. Seas 6 to 9 ft S of 18N, and 4 to 6 ft elsewhere. .TONIGHT...E winds 15 to 25 kt S of 18N, and SE 10 to 20 kt elsewhere. Seas 6 to 9 ft S of 18N, and 4 to 6 ft elsewhere. .THU...E winds 15 to 25 kt S of 18N, and E 10 to 15 kt elsewhere. Seas 6 to 9 ft S of 18N, and 4 to 6 ft elsewhere. .THU NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft S of 18N, and 3 to 5 ft elsewhere. .FRI...E winds 10 to 20 kt. Seas 5 to 7 ft. .FRI NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. .SAT...NE winds 10 to 15 kt. Seas 3 to 5 ft. .SAT NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. .SUN...NE winds 10 to 15 kt. Seas 3 to 5 ft. .SUN NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. Caribbean from 11N to 15N W of 72W .THIS AFTERNOON...E winds 20 to 30 kt within 90 nm of coast of Colombia, and E 15 to 25 kt elsewhere. Seas 7 to 10 ft. .TONIGHT...E winds 20 to 30 kt within 90 nm of coast of Colombia, and E 15 to 25 kt elsewhere. Seas 8 to 11 ft. .THU...E winds 20 to 30 kt within 90 nm of coast of Colombia, and E 15 to 25 kt elsewhere. Seas 8 to 11 ft. .THU NIGHT...E winds 20 to 30 kt within 90 nm of coast of Colombia, and E 15 to 25 kt elsewhere. Seas 7 to 10 ft. .FRI...E winds 15 to 25 kt. Seas 7 to 10 ft. .FRI NIGHT...NE winds 10 to 20 kt. Seas 6 to 9 ft. .SAT...NE winds 10 to 20 kt. Seas 6 to 9 ft. .SAT NIGHT...NE winds 10 to 20 kt. Seas 6 to 8 ft. .SUN...NE winds 10 to 20 kt. Seas 6 to 8 ft. .SUN NIGHT...NE winds 10 to 20 kt. Seas 6 to 8 ft. SW Caribbean S of 11N .THIS AFTERNOON...NE winds 10 to 20 kt. Seas 7 to 10 ft. .TONIGHT...NE winds 10 to 20 kt. Seas 7 to 10 ft. .THU...NE winds 10 to 20 kt. Seas 7 to 10 ft. .THU NIGHT...NE winds 10 to 20 kt. Seas 7 to 10 ft. .FRI...NE winds 10 to 20 kt. Seas 7 to 10 ft. .FRI NIGHT...NE winds 10 to 20 kt. Seas 6 to 9 ft. .SAT...NE winds 10 to 20 kt. Seas 6 to 9 ft. .SAT NIGHT...NE winds 10 to 20 kt. Seas 6 to 8 ft. .SUN...NE winds 10 to 20 kt. Seas 6 to 9 ft. .SUN NIGHT...NE winds 10 to 20 kt. Seas 6 to 8 ft. Caribbean between 64W and 72W .THIS AFTERNOON...E winds 15 to 25 kt. Seas 3 to 5 ft Gulf of Venezuela, and 6 to 9 ft elsewhere. .TONIGHT...E winds 15 to 25 kt. Seas 3 to 5 ft Gulf of Venezuela, and 6 to 9 ft elsewhere. .THU...E winds 15 to 25 kt. Seas 3 to 5 ft Gulf of Venezuela, and 6 to 9 ft elsewhere. .THU NIGHT...E winds 15 to 25 kt. Seas 3 to 5 ft Gulf of Venezuela, and 6 to 8 ft elsewhere. .FRI...E winds 10 to 20 kt. Seas 6 to 8 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 4 to 6 ft. .SUN...E winds 10 to 20 kt. Seas 4 to 6 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .THIS AFTERNOON...NE winds 10 to 20 kt. Seas 8 to 11 ft. .TONIGHT...NE winds 10 to 20 kt. Seas 8 to 11 ft. .THU...NE winds 10 to 20 kt. Seas 8 to 11 ft. .THU NIGHT...NE winds 15 to 20 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 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 15 to 20 kt. Seas 6 to 8 ft. .SUN NIGHT...E winds 15 to 20 kt. Seas 6 to 8 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .THIS AFTERNOON...NE winds 10 to 20 kt. Seas 6 to 8 ft. .TONIGHT...NE winds 10 to 20 kt. Seas 7 to 10 ft. .THU...NE winds 10 to 15 kt. Seas 7 to 10 ft. .THU NIGHT...NE winds 10 to 20 kt. Seas 6 to 9 ft. .FRI...E winds 10 to 15 kt. Seas 6 to 9 ft. .FRI NIGHT...NE winds 10 to 20 kt. Seas 6 to 8 ft. .SAT...E winds 10 to 15 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. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...A cold front extends from 21N50W to the NE Caribbean along 17N, and will drift SE today. Large northerly swell will affect the waters E of 72W through Thu. A cold front will move east of northern Florida Thu night, extend from near 31N71W to the Straits of Florida Fri night, then become stationary on Sat. An area of low pressure forming along the stationary front will intensify northerly winds east of northern Florida Sun and Sun night, with gale conditions possible. ATLC waters from 27N to 31N W of 77W ...GALE CONDITIONS POSSIBLE... .THIS AFTERNOON...SW winds 10 to 20 kt. Seas 5 to 7 ft. .TONIGHT...S winds 10 to 20 kt. Seas 4 to 6 ft. .THU...S winds 15 to 25 kt. Seas 6 to 8 ft. .THU NIGHT...SW winds 20 to 30 kt. Seas 7 to 10 ft. .FRI...W winds 15 to 25 kt. Seas 7 to 10 ft. .FRI NIGHT...N winds 10 to 15 kt. Seas 5 to 7 ft. .SAT...NE winds 10 to 15 kt. Seas 8 to 11 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 9 to 14 ft. .SUN...E winds 10 to 15 kt, shifting to N 10 to 20 kt in the afternoon. Seas 11 to 16 ft. .SUN NIGHT...NW winds 15 to 25 kt. Seas 12 to 17 ft. ATLC waters from 27N to 31N between 65W and 77W .THIS AFTERNOON...S winds 10 to 20 kt. Seas 7 to 10 ft. .TONIGHT...SW winds 10 to 15 kt. Seas 6 to 8 ft. .THU...SW winds 10 to 20 kt. Seas 6 to 8 ft. .THU NIGHT...S winds 15 to 25 kt W of 70W, and S 10 to 20 kt elsewhere. Seas 5 to 7 ft. .FRI...S winds 15 to 25 kt. Seas 6 to 9 ft. .FRI NIGHT...SW winds 10 to 20 kt. Seas 6 to 9 ft. .SAT...S winds 10 to 15 kt. Seas 7 to 10 ft. .SAT NIGHT...SE winds 10 to 15 kt. Seas 8 to 11 ft. .SUN...SE winds 10 to 15 kt. Seas 8 to 13 ft. .SUN NIGHT...S winds 10 to 15 kt. Seas 8 to 12 ft. Bahamas N of 22N .THIS AFTERNOON...SE winds 10 to 20 kt. Seas 4 to 6 ft. .TONIGHT...SE winds 10 to 20 kt. Seas 4 to 6 ft. .THU...SE winds 10 to 15 kt. Seas 4 to 6 ft. .THU NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. .FRI...S winds 10 to 15 kt. Seas 3 to 5 ft. .FRI NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. .SAT...SW winds 10 to 15 kt. Seas 3 ft. .SAT NIGHT...N winds less than 10 kt. Seas 3 to 4 ft. .SUN...W winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 4 to 6 ft. .SUN NIGHT...NW winds 10 to 15 kt. Seas 4 to 6 ft. ATLC waters from 22N to 27N between 65W and the Bahamas .THIS AFTERNOON...SE winds 10 to 15 kt. Seas 8 to 11 ft. .TONIGHT...E winds 10 to 15 kt. Seas 7 to 10 ft. .THU...SE winds 10 to 15 kt. Seas 6 to 8 ft. .THU NIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft. .FRI...SE winds 10 to 15 kt. Seas 5 to 7 ft. .FRI NIGHT...SE winds 10 to 15 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 5 to 7 ft. .SUN...SE winds 10 to 15 kt. Seas 6 to 9 ft. .SUN NIGHT...SE winds 10 to 15 kt. Seas 7 to 9 ft. ATLC waters S of 22N W of 65W .THIS AFTERNOON...E winds 15 to 20 kt. Seas 7 to 10 ft. .TONIGHT...E winds 15 to 20 kt. Seas 7 to 10 ft. .THU...E winds 10 to 20 kt. Seas 6 to 9 ft. .THU NIGHT...E winds 15 to 20 kt. Seas 6 to 8 ft. .FRI...E winds 10 to 20 kt. Seas 6 to 8 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .SAT...E winds 10 to 15 kt. Seas 4 to 6 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .SUN...E winds 10 to 15 kt. Seas 4 to 6 ft. .SUN NIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft. ATLC waters from 19N to 22N between 55W and 65W .THIS AFTERNOON...NE winds 15 to 20 kt. Seas 11 to 16 ft. .TONIGHT...NE winds 15 to 20 kt. Seas 10 to 12 ft. .THU...NE winds 15 to 20 kt. Seas 9 to 11 ft. .THU NIGHT...NE winds 15 to 20 kt. Seas 8 to 10 ft. .FRI...E winds 15 to 20 kt. Seas 8 to 10 ft. .FRI NIGHT...E winds 15 to 20 kt. Seas 7 to 9 ft. .SAT...E winds 15 to 20 kt. Seas 7 to 9 ft. .SAT NIGHT...E winds 15 to 20 kt. Seas 7 to 8 ft. .SUN...E winds 15 to 20 kt. Seas 7 to 8 ft. .SUN NIGHT...E winds 15 kt. Seas 7 ft.