000 FZNT31 KNHC 240853 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 453 AM EDT Fri Sep 24 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 near 11.5N 42.2W 993 mb at 5 AM EDT moving W at 13 kt. Maximum sustained winds 65 kt gusts 80 kt. Sam will move to 11.7N 44.0W this afternoon, 12.1N 45.9W Sat morning, 12.5N 47.4W Sat afternoon, 12.9N 48.7W Sun morning, 13.4N 50.0W Sun afternoon, and 14.1N 51.1W Mon morning. Sam will change little in intensity as it moves to 15.9N 53.8W by early Tue. Meanwhile, moderate trade winds will persist over much of the Caribbean into early next week, becoming fresh over the south-central Caribbean starting tonight as high pressure builds east of the Bahamas. Fresh to strong winds are forecast in the Gulf of Honduras Sun night. NW Caribbean W of 85W .TODAY...Variable winds less than 10 kt, becoming E less than 10 kt in the afternoon. Seas 2 ft or less. .TONIGHT...E winds 10 kt. Seas 2 ft or less. .SAT...E winds less than 10 kt. Seas 2 ft or less. .SAT NIGHT...E winds 10 to 15 kt. Seas 2 ft or less. .SUN...E winds 10 kt. Seas 2 ft or less. .SUN NIGHT...E winds 10 to 20 kt. Seas 2 ft or less. .MON...E winds 10 to 20 kt, diminishing to less than 10 kt in the afternoon. Seas 2 ft or less. .MON NIGHT...E winds 10 to 15 kt. Seas 2 ft or less. .TUE...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 2 ft or less. Caribbean N of 15N between 72W and 85W .TODAY...E winds 10 to 15 kt S of 18N, and SE less than 10 kt elsewhere. Seas 2 ft or less. .TONIGHT...E winds 10 to 20 kt S of 18N, and E less than 10 kt elsewhere. Seas 2 ft or less. .SAT...E winds 10 to 20 kt S of 18N, and E less than 10 kt elsewhere. S of 18N, seas 2 ft or less, building to 5 ft in the afternoon. Elsewhere, seas 2 ft or less. .SAT NIGHT...E winds 10 to 20 kt S of 18N, and E less than 10 kt elsewhere. Seas 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 5 ft S of 18N, and 2 ft or less elsewhere. .SUN NIGHT...NE winds 10 to 20 kt. Seas 5 ft S of 18N, and 2 ft or less elsewhere. .MON...NE winds 10 to 15 kt S of 18N, and NE less than 10 kt elsewhere. S of 18N, seas 5 ft in the morning, subsiding to 2 ft or less. Elsewhere, seas 2 ft or less. .MON NIGHT...E winds 10 to 15 kt S of 18N, and NE less than 10 kt elsewhere. Seas 2 ft or less. .TUE...E winds 10 to 15 kt S of 18N, and NE less than 10 kt elsewhere. Seas 2 ft or less. Caribbean from 11N to 15N W of 72W .TODAY...E winds 10 to 15 kt. Seas 2 ft or less. .TONIGHT...E winds 10 to 20 kt. Seas 2 ft or less, building to 5 ft after midnight. .SAT...E winds 10 to 20 kt. Seas 5 to 6 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 5 to 6 ft. .SUN...E winds 15 to 25 kt. Seas 5 to 6 ft. .SUN NIGHT...NE winds 10 to 20 kt. Seas 5 to 6 ft. .MON...E winds 10 to 20 kt. Seas 5 to 6 ft. .MON NIGHT...NE winds 10 to 20 kt. Seas 5 ft. .TUE...E winds 10 to 20 kt. Seas 5 ft. SW Caribbean S of 11N .TODAY...SE winds less than 10 kt. Seas 2 ft or less. .TONIGHT...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 5 ft after midnight. .SUN...NE winds 10 to 20 kt. Seas 5 ft. .SUN NIGHT...N winds 10 to 15 kt. Seas 5 to 6 ft. .MON...NE winds 10 to 20 kt. Seas 5 ft. .MON NIGHT...N winds 10 to 15 kt. Seas 5 ft. .TUE...E winds 10 to 15 kt. Seas 2 ft or less. Caribbean between 64W and 72W .TODAY...SE winds 10 to 15 kt. Seas 2 ft or less. .TONIGHT...E winds 10 to 20 kt. Seas 2 ft or less, building to 5 ft after midnight. .SAT...E winds 10 to 20 kt. Seas 5 ft. .SAT NIGHT...E winds 10 to 20 kt. Gulf of Venezuela, seas 2 ft or less, building to 5 ft after midnight. Elsewhere, seas 5 ft. .SUN...E winds 10 to 20 kt. Seas 5 ft in the morning, subsiding to 2 ft or less. .SUN NIGHT...E winds 10 to 20 kt. Seas 2 ft or less. .MON...E winds 10 to 20 kt. Seas 2 ft or less. .MON NIGHT...E winds 10 to 20 kt. Seas 2 ft or less. .TUE...E winds 10 to 15 kt. Seas 2 ft or less. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .TODAY...SE winds 10 to 15 kt. Seas 5 to 6 ft. .TONIGHT...E winds 10 to 15 kt. Seas 5 to 6 ft. .SAT...E winds 10 kt. Seas 5 to 6 ft. .SAT NIGHT...E winds 10 kt. Seas 5 to 6 ft. .SUN...E winds 10 kt. Seas 5 to 6 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .MON...HURRICANE CONDITIONS POSSIBLE. .MON NIGHT...HURRICANE CONDITIONS POSSIBLE. .TUE...HURRICANE CONDITIONS POSSIBLE. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .TODAY...SE winds 10 to 15 kt. Seas 5 to 6 ft. .TONIGHT...E winds 10 to 15 kt. Seas 5 to 6 ft. .SAT...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 5 to 6 ft. .SAT NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 5 to 6 ft. .SUN...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 5 to 7 ft. .SUN NIGHT...E winds less than 10 kt. Seas 5 to 7 ft. .MON...HURRICANE CONDITIONS POSSIBLE. .MON NIGHT...HURRICANE CONDITIONS POSSIBLE. .TUE...HURRICANE CONDITIONS POSSIBLE. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...A cold front extending from 31N77W to 28N80W will stall then dissipate through early Sun just before a second weak front possibly moves into the region late Sun. Farther east, Hurricane Sam is centered near 11.5N 42.2W 993 mb at 5 AM EDT, moving W at 13 kt. Maximum sustained winds 65 kt gusts 80 kt. Sam will move to 11.7N 44.0W this afternoon, 12.1N 45.9W Sat morning, 12.5N 47.4W Sat afternoon, 12.9N 48.7W Sun morning, 13.4N 50.0W Sun afternoon, and 14.1N 51.1W Mon morning. Sam will change little in intensity as it moves to 15.9N 53.8W by early Tue. ATLC waters from 27N to 31N W of 77W .TODAY...NW winds less than 10 kt, shifting to N in the afternoon. Seas 5 to 6 ft. .TONIGHT...NE winds 10 to 15 kt, shifting to E after midnight. Seas 5 ft. .SAT...N winds 10 to 15 kt. Seas 5 ft. .SAT NIGHT...N winds 10 to 15 kt. Seas 5 ft. .SUN...N winds 10 to 15 kt. Seas 5 ft. .SUN NIGHT...NE winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Seas 5 ft. .MON...N winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 5 ft. .MON NIGHT...NE winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Seas 5 ft in the evening, subsiding to 2 ft or less. .TUE...NE winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 ft or less. ATLC waters from 27N to 31N between 65W and 77W .TODAY...E winds less than 10 kt. Seas 5 to 6 ft. .TONIGHT...W of 70W, S winds less than 10 kt in the evening, becoming variable winds less than 10 kt. Elsewhere, N winds less than 10 kt. Seas 5 to 6 ft. .SAT...W winds less than 10 kt. Seas 5 to 6 ft. .SAT NIGHT...W winds less than 10 kt. Seas 5 ft. .SUN...W of 70W, NW winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Elsewhere, NW winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Seas 5 ft. .SUN NIGHT...W of 70W, NE winds 10 to 15 kt. Elsewhere, W winds less than 10 kt in the evening, becoming variable winds less than 10 kt. Seas 5 ft. .MON...W of 70W, NE winds 10 to 15 kt. Elsewhere, Variable winds less than 10 kt, becoming S less than 10 kt in the afternoon. Seas 2 ft or less. .MON NIGHT...E winds 10 to 15 kt W of 70W, and S less than 10 kt elsewhere. Seas 2 ft or less. .TUE...SE winds less than 10 kt, shifting to N in the afternoon. Seas 5 ft. Bahamas N of 22N .TODAY...SE winds less than 10 kt. Seas 2 ft or less. .TONIGHT...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...E winds less than 10 kt. Seas 2 ft or less. .SUN...NE winds 10 to 15 kt. Seas 2 ft or less. .SUN NIGHT...NE winds 10 to 15 kt. Seas 2 ft or less. .MON...NE winds less than 10 kt, shifting to N in the afternoon. Seas 2 ft or less. .MON NIGHT...NE winds 10 to 15 kt. Seas 2 ft or less. .TUE...N winds less than 10 kt. Seas 2 ft or less. ATLC waters from 22N to 27N between 65W and the Bahamas .TODAY...W of 70W, NE winds 10 kt in the morning, becoming variable winds less than 10 kt. Elsewhere, N winds 10 to 15 kt. Seas 5 to 6 ft. .TONIGHT...Variable winds less than 10 kt W of 70W, and N 10 to 15 kt elsewhere. Seas 5 to 6 ft. .SAT...E winds less than 10 kt. Seas 5 ft. .SAT NIGHT...NE winds less than 10 kt. Seas 5 ft. .SUN...E winds less than 10 kt. Seas 5 ft in the morning, subsiding to 2 ft or less. .SUN NIGHT...E winds less than 10 kt. Seas 2 ft or less. .MON...SE winds less than 10 kt. Seas 2 ft or less. .MON NIGHT...SE winds less than 10 kt. Seas 2 ft or less, building to 5 ft after midnight. .TUE...S winds less than 10 kt. Seas 5 to 6 ft. ATLC waters S of 22N W of 65W .TODAY...S winds 10 to 15 kt. Seas 5 ft. .TONIGHT...NE winds 10 to 15 kt, shifting to E after midnight. Seas 5 ft. .SAT...SE winds less than 10 kt. Seas 5 ft. .SAT NIGHT...E winds less than 10 kt. Seas 5 ft. .SUN...E winds less than 10 kt. Seas 5 ft in the morning, subsiding to 2 ft or less. .SUN NIGHT...E winds less than 10 kt. Seas 2 ft or less. .MON...E winds less than 10 kt. Seas 2 ft or less. .MON NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 5 ft. .TUE...SE winds 10 to 15 kt, shifting to E in the afternoon. Seas 5 ft. ATLC waters from 19N to 22N between 55W and 65W .TODAY...S winds 10 to 15 kt. Seas 5 to 7 ft. .TONIGHT...SE winds 10 to 15 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 5 ft. .SUN...E winds less than 10 kt. Seas 5 to 6 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...TROPICAL STORM CONDITIONS POSSIBLE. .TUE...HURRICANE CONDITIONS POSSIBLE.