000 FZNT31 KNHC 010317 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1117 PM EDT Thu Sep 30 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...Hurricane Sam remains well north-northeast of the Leeward Islands and will continue to generate swells over Atlantic waters from off the N Leeward Islands to north of the Mona Passage through Fri. Meanwhile, tranquil trades will prevail over the Caribbean through Fri. As high pressure builds in behind Hurricane Sam, winds are expected to become moderate to fresh across the central and E Caribbean and in the tropical N Atlantic beginning Sat and continuing through mid week. NW Caribbean W of 85W .OVERNIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .FRI...E winds 10 to 15 kt. Seas 3 to 4 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 3 ft. .SAT...E winds 10 to 15 kt. Seas 3 to 4 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .SUN...E winds 10 to 15 kt. Seas 3 to 4 ft. .SUN NIGHT...E winds less than 10 kt. Seas 3 to 4 ft. .MON...NE winds less than 10 kt. Seas 3 ft. .MON NIGHT...NE winds less than 10 kt. Seas 3 ft. .TUE...NE winds less than 10 kt. Seas 3 ft in the morning, subsiding to 2 ft or less. .TUE NIGHT...E winds less than 10 kt. Seas 2 ft or less. Caribbean N of 15N between 72W and 85W .OVERNIGHT...S of 18N, E winds less than 10 kt. Elsewhere, NE winds less than 10 kt, shifting to E after midnight. Seas 2 ft or less. .FRI...E winds 10 to 15 kt. Seas 3 ft. .FRI NIGHT...S of 18N, E winds 10 to 15 kt. Elsewhere, E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 to 4 ft. .SAT...E winds 10 to 15 kt. Seas 3 to 5 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .SUN...E winds 10 to 15 kt. Seas 3 to 5 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .MON...E winds 10 to 15 kt. Seas 4 to 6 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .TUE...E winds 10 to 15 kt. Seas 4 to 6 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. Caribbean from 11N to 15N W of 72W .OVERNIGHT...NE winds 10 to 15 kt within 90 nm of coast of Colombia, and E less than 10 kt elsewhere. Seas 3 ft. .FRI...Within 90 nm of coast of Colombia, E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Elsewhere, E winds 10 to 15 kt. Seas 3 ft. .FRI NIGHT...E winds 10 to 20 kt within 90 nm of coast of Colombia, and NE 10 to 15 kt elsewhere. Seas 3 to 4 ft. .SAT...E winds 10 to 20 kt within 90 nm of coast of Colombia, and E 10 to 15 kt elsewhere. Seas 3 to 5 ft. .SAT NIGHT...NE winds 10 to 20 kt. Seas 3 to 5 ft. .SUN...E winds 10 to 20 kt. Seas 3 to 5 ft. .SUN NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. .MON...E winds 10 to 15 kt. Seas 3 to 5 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .TUE...E winds 10 to 15 kt. Seas 4 to 6 ft. .TUE NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 4 to 6 ft. SW Caribbean S of 11N .OVERNIGHT...Variable winds less than 10 kt. Seas 2 ft or less. .FRI...Variable winds less than 10 kt. Seas 2 ft or less. .FRI NIGHT...NE winds less than 10 kt. Seas 2 ft or less, building to 3 ft after midnight. .SAT...N winds less than 10 kt. Seas 2 ft or less, building to 3 ft in the afternoon. .SAT NIGHT...N winds less than 10 kt. Seas 3 to 4 ft. .SUN...NW winds less than 10 kt. Seas 3 to 4 ft. .SUN NIGHT...NW winds less than 10 kt. Seas 3 to 4 ft. .MON...W winds less than 10 kt. Seas 3 to 4 ft. .MON NIGHT...W winds less than 10 kt. Seas 3 ft. .TUE...W winds less than 10 kt. Seas 3 to 4 ft. .TUE NIGHT...W winds less than 10 kt. Seas 3 to 4 ft. Caribbean between 64W and 72W .OVERNIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .FRI...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. .FRI NIGHT...E winds 10 to 20 kt Gulf of Venezuela, and E 10 to 15 kt elsewhere. Seas 3 to 5 ft. .SAT...E winds 10 to 15 kt. Seas 3 ft Gulf of Venezuela, and 4 to 6 ft elsewhere. .SAT NIGHT...E winds 10 to 20 kt. Seas 4 to 6 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 6 to 8 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft. .TUE...E winds 10 to 20 kt. Seas 6 to 8 ft. .TUE 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 .OVERNIGHT...SE 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 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 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. .TUE...E winds 10 to 20 kt. Seas 6 to 9 ft. .TUE 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 .OVERNIGHT...E winds 10 to 15 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 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 6 to 9 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. .TUE...E winds 10 to 20 kt. Seas 6 to 8 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...Hurricane Sam near 25.0N 61.2W 938 mb at 11 PM EDT moving NNW at 14 kt. Maximum sustained winds 125 kt gusts 150 kt. Sam will move to 27.2N 61.8W Fri morning, by 32.9N 60.5W Sat morning, and near 35.0N 58.9W Sat evening, 36.6N 56.8W Sun morning, and 38.7N 53.8W Sun evening. Some fluctuations in intensity are expected during the next couple of days, but Sam is forecast to remain a major hurricane into Saturday, with more significant weakening anticipated later in the weekend. Large swell from Sam will impact the area northeast of the Bahamas starting Fri and continuing through the weekend. Meanwhile, a weak pressure pattern will maintain quiescent conditions until tonight. A weak cold front will move from the Carolinas to the central Bahamas by Fri and dissipate by Sat. Stronger high pressure will build in to the area, which will bring moderate to occasionally fresh winds through Tue. ATLC waters from 27N to 31N W of 77W .OVERNIGHT...E winds 10 to 15 kt. Seas 4 to 5 ft. .FRI...E winds 10 to 15 kt. Seas 4 to 6 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft. .SAT...E winds 10 to 15 kt. Seas 7 to 10 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 7 to 10 ft. .SUN...E winds 10 to 15 kt. Seas 6 to 8 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .MON...E winds 10 to 15 kt. Seas 4 to 6 ft. .MON NIGHT...SE winds 10 to 15 kt. Seas 4 to 5 ft. .TUE...SE winds 10 to 15 kt. Seas 4 to 5 ft. .TUE NIGHT...SE winds 10 kt. Seas 4 to 5 ft. ATLC waters from 27N to 31N between 65W and 77W .OVERNIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft W of 70W, and 7 to 10 ft elsewhere. .FRI...NE winds 10 to 20 kt. W of 70W, seas 7 to 10 ft. Elsewhere, seas 8 to 13 ft, building to 11 to 16 ft in the afternoon. .FRI NIGHT...NE winds 10 to 20 kt. Seas 8 to 12 ft W of 70W, and 13 to 18 ft elsewhere. .SAT...NE winds 10 to 15 kt. Seas 8 to 11 ft W of 70W, and 9 to 14 ft elsewhere. .SAT NIGHT...NE winds 10 to 15 kt. Seas 8 to 11 ft. .SUN...NE winds 10 to 15 kt. Seas 6 to 8 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .MON...E winds 10 to 15 kt. Seas 5 to 7 ft. .MON NIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft. .TUE...SE winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 5 to 7 ft. .TUE NIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft. Bahamas N of 22N .OVERNIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .FRI...E winds 10 to 15 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 4 to 6 ft. .SUN...E winds 10 to 15 kt. Seas 4 to 6 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .MON...E winds 10 to 15 kt. Seas 3 to 5 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .TUE...E winds less than 10 kt. Seas 3 to 5 ft. .TUE NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. ATLC waters from 22N to 27N between 65W and the Bahamas .OVERNIGHT...NE winds 10 to 15 kt W of 70W, and NE less than 10 kt elsewhere. Seas 6 to 7 ft W of 70W, and 8 to 13 ft elsewhere. .FRI...NE winds 10 to 15 kt. Seas 7 to 10 ft W of 70W, and 9 to 14 ft elsewhere. .FRI NIGHT...W of 70W, NE winds 10 to 20 kt. Elsewhere, NE winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Seas 8 to 11 ft. .SAT...NE winds 10 to 15 kt. Seas 7 to 10 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 7 ft. .MON...SE winds 10 to 15 kt. Seas 6 to 7 ft. .MON NIGHT...SE winds 10 to 20 kt. Seas 6 to 8 ft. .TUE...SE winds 10 to 20 kt. Seas 6 to 8 ft. .TUE NIGHT...SE winds 10 to 20 kt. Seas 6 to 8 ft. ATLC waters S of 22N W of 65W .OVERNIGHT...E winds less than 10 kt. Seas 6 to 8 ft. .FRI...E winds less than 10 kt. Seas 5 to 7 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .SAT...E winds 10 to 15 kt. Seas 4 to 6 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .SUN...E winds 10 to 15 kt. Seas 4 to 6 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 4 to 6 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. .TUE...E winds 10 to 20 kt. Seas 5 to 7 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. ATLC waters from 19N to 22N between 55W and 65W .OVERNIGHT...SE winds 10 to 15 kt. Seas 7 to 10 ft. .FRI...SE winds 10 to 15 kt. Seas 6 to 9 ft. .FRI NIGHT...SE winds 10 to 15 kt. Seas 6 to 7 ft. .SAT...SE winds 10 to 15 kt. Seas 6 to 7 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 6 to 8 ft. .SUN...E winds 10 to 15 kt. Seas 7 to 8 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 7 to 8 ft. .MON...E winds 10 to 15 kt. Seas 7 to 9 ft. .MON NIGHT...E winds 15 to 20 kt. Seas 8 to 9 ft. .TUE...E winds 15 to 20 kt. Seas 8 to 9 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 8 to 9 ft.