000 FZNT31 KNHC 302047 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 447 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 is 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 tropical N Atlantic by Sat through at least Tue. NW Caribbean W of 85W .TONIGHT...E winds 10 to 20 kt. Seas 3 ft. .FRI...E winds 10 to 20 kt. Seas 3 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 3 ft. .SAT...E winds 10 to 20 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...NE winds 10 to 15 kt. Seas 3 to 4 ft. .MON...NE winds 10 to 15 kt. Seas 3 ft. .MON NIGHT...NE winds less than 10 kt. Seas 3 ft. .TUE...NE winds less than 10 kt. Seas 2 to 3 ft. Caribbean N of 15N between 72W and 85W .TONIGHT...E winds 10 to 20 kt. Seas 2 ft or less. .FRI...E winds 10 to 20 kt. Seas 3 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. .SAT...E winds 10 to 20 kt. Seas 3 to 4 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. .SUN...E winds 10 to 20 kt. Seas 3 to 4 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .MON...E winds 15 to 25 kt S of 18N, and E 10 to 20 kt elsewhere. S of 18N, seas 3 to 5 ft. Elsewhere, seas 2 to 3 ft. .MON NIGHT...E winds 15 to 25 kt S of 18N, and E 10 to 20 kt elsewhere. Seas 4 to 6 ft S of 18N, and 2 ft or less elsewhere. .TUE...E winds 15 to 25 kt S of 18N, and E 10 to 20 kt elsewhere. Seas 4 to 6 ft S of 18N, and 3 to 4 ft elsewhere. Caribbean from 11N to 15N W of 72W .TONIGHT...E winds 10 to 15 kt. Seas 3 ft. .FRI...E winds 10 to 15 kt. Seas 3 ft. .FRI NIGHT...NE winds 10 to 20 kt. Seas 3 to 4 ft. .SAT...E winds 10 to 20 kt. Seas 3 to 5 ft. .SAT NIGHT...NE winds 15 to 25 kt. Seas 3 to 5 ft. .SUN...E winds 10 to 20 kt. Seas 3 to 5 ft. .SUN NIGHT...NE winds 10 to 20 kt. Seas 3 to 5 ft. .MON...E winds 10 to 20 kt. Seas 3 to 5 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .TUE...E winds 10 to 20 kt. Seas 4 to 6 ft. SW Caribbean S of 11N .TONIGHT...E winds less than 10 kt. Seas 2 ft or less. .FRI...NE 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 3 ft. .SAT NIGHT...N winds 10 to 15 kt. Seas 3 ft. .SUN...NW winds 10 to 15 kt. Seas 3 to 4 ft. .SUN NIGHT...NW winds 10 to 15 kt. Seas 3 to 4 ft. .MON...W winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 3 ft. .MON NIGHT...NW winds 10 to 15 kt. Seas 3 ft. .TUE...W winds less than 10 kt. Seas 3 ft. Caribbean between 64W and 72W .TONIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. .FRI...E winds 10 to 20 kt. Seas 2 ft or less Gulf of Venezuela, and 3 to 4 ft elsewhere. .FRI NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .SAT...E winds 10 to 20 kt. Seas 3 ft Gulf of Venezuela, and 4 to 6 ft elsewhere. .SAT NIGHT...E winds 15 to 25 kt. Seas 3 to 5 ft Gulf of Venezuela, and 4 to 6 ft elsewhere. .SUN...E winds 10 to 20 kt Gulf of Venezuela, and E 15 to 25 kt elsewhere. Seas 3 ft Gulf of Venezuela, and 5 to 7 ft elsewhere. .SUN NIGHT...E winds 15 to 25 kt. Seas 3 to 4 ft Gulf of Venezuela, and 5 to 7 ft elsewhere. .MON...E winds 10 to 20 kt Gulf of Venezuela, and E 15 to 25 kt elsewhere. Seas 3 to 4 ft Gulf of Venezuela, and 6 to 8 ft elsewhere. .MON NIGHT...E winds 10 to 20 kt Gulf of Venezuela, and E 15 to 25 kt elsewhere. Seas 3 to 4 ft Gulf of Venezuela, and 6 to 8 ft elsewhere. .TUE...E winds 10 to 20 kt Gulf of Venezuela, and E 15 to 25 kt elsewhere. Seas 3 to 4 ft Gulf of Venezuela, and 6 to 8 ft elsewhere. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .TONIGHT...SE winds 10 to 20 kt. Seas 5 to 7 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 15 to 25 kt. Seas 6 to 8 ft. .SUN...E winds 15 to 25 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 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. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .TONIGHT...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 5 to 7 ft. .SAT...E winds 10 to 20 kt. Seas 6 to 8 ft. .SAT NIGHT...E winds 15 to 25 kt. Seas 6 to 8 ft. .SUN...E winds 15 to 25 kt. Seas 6 to 8 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 6 to 8 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. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...Hurricane Sam near 23.6N 60.9W 938 mb at 5 PM EDT moving NW at 12 kt. Maximum sustained winds 125 kt gusts 150 kt. Sam will move to 25.6N 61.5W Fri morning, 28.5N 61.9W Fri afternoon, 31.3N 61.4W Sat morning, and then north of our waters by Sat afternoon. Sam will change little in intensity through Sat. Expect large swell from Sam to 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 .TONIGHT...E winds 10 to 15 kt. 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 6 to 9 ft. .SAT...E winds 10 to 20 kt. Seas 7 to 10 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 7 to 9 ft. .SUN...E winds 10 to 15 kt. Seas 5 to 7 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .MON...E winds 10 to 15 kt. Seas 4 to 5 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. ATLC waters from 27N to 31N between 65W and 77W .TONIGHT...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, and N 15 to 25 kt elsewhere. 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 15 to 25 kt. Seas 8 to 12 ft W of 70W, and 12 to 17 ft elsewhere. .SAT...NE winds 10 to 20 kt W of 70W, and N 15 to 25 kt elsewhere. Seas 8 to 13 ft. .SAT NIGHT...NE winds 10 to 20 kt. Seas 7 to 10 ft. .SUN...NE winds 10 to 20 kt. Seas 6 to 8 ft. .SUN NIGHT...E winds 10 to 20 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 10 to 15 kt. Seas 5 to 6 ft. Bahamas N of 22N .TONIGHT...NE winds 10 to 20 kt. 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 4 to 6 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 3 to 5 ft. .MON...E winds 10 to 15 kt. Seas 3 to 5 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. .TUE...E winds 10 to 20 kt. Seas 3 to 4 ft. ATLC waters from 22N to 27N between 65W and the Bahamas .TONIGHT...NE winds 10 to 15 kt. W of 70W, seas 5 to 7 ft. Elsewhere, seas 7 to 10 ft, building to 8 to 13 ft after midnight. .FRI...NE winds 10 to 20 kt. Seas 7 to 10 ft W of 70W, and 8 to 13 ft elsewhere. .FRI NIGHT...NE winds 10 to 20 kt. Seas 7 to 10 ft. .SAT...NE 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 7 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...SE winds 10 to 20 kt. Seas 6 to 8 ft. ATLC waters S of 22N W of 65W .TONIGHT...NE 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 4 to 6 ft. .SAT...E winds 10 to 15 kt. Seas 4 to 6 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. .MON...SE winds 10 to 20 kt. Seas 4 to 6 ft. .MON NIGHT...SE winds 15 to 25 kt. Seas 5 to 7 ft. .TUE...E winds 15 to 25 kt. Seas 5 to 7 ft. ATLC waters from 19N to 22N between 55W and 65W .TONIGHT...S winds 15 to 25 kt. Seas 8 to 13 ft, subsiding to 7 to 10 ft after midnight. .FRI...SE winds 10 to 20 kt. Seas 6 to 9 ft. .FRI NIGHT...SE winds 10 to 20 kt. Seas 6 to 7 ft. .SAT...E winds 10 to 20 kt. Seas 6 to 7 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 6 to 7 ft. .SUN...E winds 10 to 20 kt. Seas 7 to 8 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 7 to 8 ft. .MON...E winds 10 to 20 kt. Seas 7 to 8 ft. .MON NIGHT...E winds 15 to 20 kt. Seas 7 to 9 ft. .TUE...E winds 15 to 20 kt. Seas 8 to 9 ft.