000 FZNT31 KNHC 231516 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1116 AM EDT Thu Sep 23 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...Tropical Storm Sam near is near 10.9N 38.1W 1003 mb at 1500 UTC, moving W at 14 kt. Maximum sustained winds are 45 kt with gusts to 55 kt. Sam will continue to intensify as it moves across the Atlantic, becoming a hurricane near 12N45W by Fri evening, and reaching 55W east of the Leeward Islands by Mon night. Meanwhile, moderate trade winds will persist over much of the Caribbean into early next week, becoming fresh over the south- central Caribbean starting Fri night as high pressure builds east of the Bahamas. NW Caribbean W of 85W .THIS AFTERNOON...Variable winds less than 10 kt, becoming N less than 10 kt in the afternoon. Seas 2 ft or less. .TONIGHT...E winds less than 10 kt. Seas 2 ft or less. .FRI...Variable winds less than 10 kt, becoming E less than 10 kt in the afternoon. Seas 2 ft or less. .FRI NIGHT...E winds less than 10 kt. Seas 2 ft or less. .SAT...E winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 ft or less. .SAT NIGHT...E winds 10 to 15 kt. Seas 3 ft. .SUN...E winds 10 to 15 kt. Seas 3 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 3 ft. .MON...E winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 3 ft. Caribbean N of 15N between 72W and 85W .THIS AFTERNOON...E winds 10 to 15 kt S of 18N, and E less than 10 kt elsewhere. Seas 2 ft or less. .TONIGHT...S of 18N, E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Elsewhere, E winds less than 10 kt. Seas 2 ft or less. .FRI...E winds 10 to 15 kt S of 18N, and SE less than 10 kt elsewhere. Seas 2 ft or less. .FRI NIGHT...E winds 10 to 15 kt S of 18N, and E less than 10 kt elsewhere. Seas 2 ft or less, building to 3 ft after midnight. .SAT...S of 18N, E winds 10 to 20 kt. Elsewhere, E winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 3 to 5 ft S of 18N, and 2 ft or less elsewhere. .SAT NIGHT...E winds 10 to 20 kt S of 18N, and E less than 10 kt elsewhere. Seas 3 to 5 ft S of 18N, and 2 ft or less elsewhere. .SUN...E winds 10 to 20 kt S of 18N, and NE less than 10 kt elsewhere. Seas 3 to 5 ft S of 18N, and 2 ft or less elsewhere. .SUN NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft S of 18N, and 2 ft or less elsewhere. .MON...E winds 10 to 15 kt S of 18N, and NE less than 10 kt elsewhere. Seas 3 ft. Caribbean from 11N to 15N W of 72W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 ft. .TONIGHT...NE winds 10 to 15 kt. Seas 3 ft. .FRI...E winds 10 to 15 kt. Seas 3 to 4 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .SAT...E winds 10 to 20 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...NE winds 15 to 25 kt within 90 nm of coast of Colombia, and NE 10 to 20 kt elsewhere. Seas 4 to 6 ft. .MON...E winds 15 to 25 kt within 90 nm of coast of Colombia, and NE 10 to 20 kt elsewhere. Seas 4 to 6 ft. SW Caribbean S of 11N .THIS AFTERNOON...NW winds less than 10 kt. Seas 2 ft or less. .TONIGHT...NW winds less than 10 kt. Seas 2 ft or less. .FRI...SE winds less than 10 kt. Seas 2 ft or less. .FRI NIGHT...NE winds less than 10 kt. Seas 2 ft or less. .SAT...NE winds less than 10 kt. Seas 2 ft or less. .SAT NIGHT...NE winds 10 to 20 kt. Seas 2 ft or less, building to 3 to 5 ft after midnight. .SUN...NE winds 10 to 20 kt. Seas 3 to 5 ft. .SUN NIGHT...NE winds 10 to 20 kt. Seas 4 to 6 ft. .MON...NE winds 10 to 20 kt. Seas 4 to 6 ft. Caribbean between 64W and 72W .THIS AFTERNOON...Gulf of Venezuela, S winds less than 10 kt, shifting to W in the afternoon. Elsewhere, SE winds 10 to 15 kt. Seas 2 ft or less Gulf of Venezuela, and 3 to 4 ft elsewhere. .TONIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. .FRI...SE winds 10 to 15 kt. Seas 3 to 4 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .SAT...E winds 10 to 20 kt. Seas 3 to 5 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .SUN...E winds 10 to 20 kt. Seas 3 to 5 ft. .SUN NIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. .MON...E winds 10 to 20 kt. Seas 3 to 4 ft. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .THIS AFTERNOON...SE winds less than 10 kt. Seas 3 to 5 ft. .TONIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 4 to 6 ft. .FRI...SE winds 10 to 15 kt. Seas 4 to 6 ft. .FRI NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 4 to 6 ft. .SAT...E winds 10 kt. Seas 4 to 6 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .SUN...E winds 10 kt. Seas 4 to 6 ft. .SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. E winds 10 to 15 kt. Seas 4 to 6 ft. .MON...HURRICANE CONDITIONS POSSIBLE. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 to 5 ft. .TONIGHT...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 15 kt. Seas 3 to 5 ft. .SAT...E winds 10 to 15 kt. Seas 4 to 6 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .SUN...E winds 10 to 15 kt. Seas 4 to 6 ft. .SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. E winds 10 to 15 kt. Seas 4 to 6 ft. .MON...HURRICANE CONDITIONS POSSIBLE. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...1009 mb low pressure, the remnant low of Peter, is near 23N67W and will dissipate as it drifts northeast of the region through Fri. Meanwhile, a cold front extending from 31N79W to Cape Canaveral, Florida will stall from 31N77W to near Fort Pierce, Florida by tonight, then dissipate through early Sun just before a second weak front possibly moves into the region early next week. Farther east, Tropical Storm Sam near is near 10.9N 38.1W 1003 mb at 1500 UTC, moving W at 14 kt. Maximum sustained winds are 45 kt with gusts to 55 kt. Sam will continue to intensify as it moves across the Atlantic, becoming a hurricane near 12N45W by Fri evening, and reaching 55W east of the Leeward Islands by Mon night. ATLC waters from 27N to 31N W of 77W .THIS AFTERNOON...SW winds 10 to 15 kt. Seas 4 to 5 ft. .TONIGHT...NW winds 10 to 15 kt, shifting to W after midnight. Seas 4 to 6 ft. .FRI...N winds 10 to 15 kt. Seas 4 to 5 ft. .FRI NIGHT...N winds 10 to 15 kt. Seas 4 to 5 ft. .SAT...N winds 10 to 15 kt. Seas 4 to 5 ft. .SAT NIGHT...N winds 10 to 15 kt. Seas 4 to 5 ft. .SUN...N winds 10 to 15 kt. Seas 4 ft. .SUN NIGHT...NE winds less than 10 kt. Seas 3 to 4 ft. .MON...NE winds 10 to 15 kt. Seas 3 to 4 ft. ATLC waters from 27N to 31N between 65W and 77W .THIS AFTERNOON...SE winds 10 to 15 kt W of 70W, and E 10 to 20 kt elsewhere. Seas 6 to 7 ft. .TONIGHT...W of 70W, SE winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Elsewhere, E winds 10 to 20 kt. Seas 5 to 6 ft. .FRI...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 4 to 6 ft. .FRI NIGHT...Variable winds less than 10 kt W of 70W, and N less than 10 kt elsewhere. Seas 4 to 6 ft. .SAT...W winds less than 10 kt. Seas 4 to 6 ft. .SAT NIGHT...W winds 10 to 15 kt W of 70W, and W less than 10 kt elsewhere. Seas 4 to 5 ft. .SUN...NW winds 10 to 15 kt W of 70W, and W less than 10 kt elsewhere. Seas 4 to 5 ft. .SUN NIGHT...W of 70W, N winds 10 to 15 kt, shifting to NE after midnight. Elsewhere, NW winds less than 10 kt. Seas 3 to 4 ft. .MON...NE winds 10 to 15 kt W of 70W, and S less than 10 kt elsewhere. Seas 3 to 4 ft. Bahamas N of 22N .THIS AFTERNOON...SE winds less than 10 kt. Seas 3 ft. .TONIGHT...E winds less than 10 kt. Seas 3 ft. .FRI...S winds less than 10 kt. Seas 3 ft in the morning, subsiding to 2 ft or less. .FRI NIGHT...SE winds less than 10 kt. Seas 2 ft or less. .SAT...SE winds less than 10 kt. Seas 2 ft or less. .SAT NIGHT...NE winds less than 10 kt. Seas 2 ft or less. .SUN...N winds 10 to 15 kt. Seas 2 ft or less. .SUN NIGHT...NE winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft after midnight. .MON...NE winds 10 to 15 kt. Seas 2 ft or less. ATLC waters from 22N to 27N between 65W and the Bahamas .THIS AFTERNOON...E winds 10 to 20 kt. Seas 6 to 7 ft. .TONIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft. .FRI...N winds less than 10 kt W of 70W, and N 10 to 15 kt elsewhere. Seas 4 to 6 ft. .FRI NIGHT...W of 70W, Variable winds less than 10 kt. Elsewhere, NW winds 10 to 15 kt, shifting to N after midnight. Seas 4 to 5 ft. .SAT...NE winds less than 10 kt, shifting to SW in the afternoon. Seas 4 to 5 ft. .SAT NIGHT...NW winds less than 10 kt in the evening, becoming variable winds less than 10 kt. Seas 4 to 5 ft. .SUN...W of 70W, SW winds less than 10 kt, shifting to NW in the afternoon. Elsewhere, Variable winds less than 10 kt. Seas 4 ft. .SUN NIGHT...W of 70W, E winds 10 to 15 kt. Elsewhere, Variable winds less than 10 kt, becoming E less than 10 kt after midnight. Seas 3 to 4 ft. .MON...E winds less than 10 kt. Seas 3 ft. ATLC waters S of 22N W of 65W .THIS AFTERNOON...S winds 10 to 20 kt. Seas 3 to 5 ft. .TONIGHT...SE winds 10 to 20 kt. Seas 3 to 5 ft. .FRI...SE winds 10 to 15 kt. Seas 3 to 5 ft. .FRI NIGHT...E winds less than 10 kt. Seas 3 to 5 ft. .SAT...SE winds less than 10 kt. Seas 3 to 4 ft. .SAT NIGHT...E winds less than 10 kt. Seas 3 to 4 ft. .SUN...E winds less than 10 kt. Seas 3 to 4 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .MON...E winds less than 10 kt. Seas 3 ft. ATLC waters from 19N to 22N between 55W and 65W .THIS AFTERNOON...SE winds 10 to 20 kt. Seas 5 to 7 ft. .TONIGHT...SE winds 10 to 20 kt. Seas 5 to 6 ft. .FRI...SE winds 10 to 15 kt. Seas 5 to 6 ft. .FRI NIGHT...SE winds less than 10 kt. Seas 5 to 6 ft. .SAT...SE winds 10 kt. Seas 5 to 6 ft. .SAT NIGHT...E winds less than 10 kt. Seas 4 to 5 ft. .SUN...E winds less than 10 kt. Seas 4 to 5 ft. .SUN NIGHT...E winds less than 10 kt. Seas 3 to 5 ft. .MON...TROPICAL STORM CONDITIONS POSSIBLE. E winds 10 to 15 kt. Seas 4 to 6 ft.