000 FZNT31 KNHC 230423 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1223 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 Depression Eighteen is well to the east over the Tropical Atlantic near 10.2N 35.0W 1008 mb at 0300 UTC moving W at 13 kt. Maximum sustained winds 30 kt gusts 40 kt. Eighteen will continue to intensify as it moves across the Atlantic, becoming a hurricane near 12.5N 46.0W by Sat morning and, reaching 55W east of the Leeward Islands by Mon. Meanwhile, moderate trade winds will persist over much of the Caribbean into early next week, becoming fresh over the south-central Caribbean Sun and Mon. NW Caribbean W of 85W .OVERNIGHT...E winds less than 10 kt. Seas 3 ft. .FRI...Variable winds less than 10 kt. 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. 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 20 kt. Seas 3 ft. .MON...E winds 10 to 20 kt. Seas 3 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 3 ft. .TUE...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 ft in the morning, subsiding to 2 ft or less. Caribbean N of 15N between 72W and 85W .OVERNIGHT...E winds 10 to 15 kt S of 18N, and E less than 10 kt elsewhere. Seas 2 ft or less. .FRI...E winds 10 to 15 kt S of 18N, and E 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. .SAT...E winds 10 to 15 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. .SAT NIGHT...E winds 10 to 15 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 15 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 NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft S of 18N, and 2 ft or less elsewhere. .MON...S of 18N, E winds 10 to 15 kt. Elsewhere, NE winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 ft. .MON NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. .TUE...E winds 10 to 15 kt S of 18N, and E less than 10 kt elsewhere. Seas 3 to 4 ft. Caribbean from 11N to 15N W of 72W .OVERNIGHT...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 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 4 to 6 ft. .SUN...E winds 10 to 20 kt. Seas 4 to 6 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. .MON NIGHT...NE winds 10 to 20 kt. Seas 4 to 5 ft. .TUE...E winds 10 to 15 kt. Seas 3 to 5 ft. SW Caribbean S of 11N .OVERNIGHT...NW winds less than 10 kt. Seas 3 ft. .FRI...Variable winds less than 10 kt, becoming SW less than 10 kt in the afternoon. Seas 2 ft or less. .FRI NIGHT...Variable winds less than 10 kt. Seas 2 ft or less. .SAT...Variable winds less than 10 kt. Seas 2 ft or less. .SAT NIGHT...N winds less than 10 kt. Seas 3 to 5 ft. .SUN...N winds less than 10 kt. Seas 3 to 5 ft. .SUN NIGHT...N winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 4 to 6 ft. .MON...NE winds 10 to 15 kt. Seas 4 to 6 ft. .MON NIGHT...N winds less than 10 kt. Seas 3 to 5 ft. .TUE...NW 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...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 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 20 kt. Seas 3 to 4 ft. .MON...E winds 10 to 20 kt. Seas 3 to 4 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. .TUE...E winds 10 to 15 kt. Seas 3 to 4 ft. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .OVERNIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .FRI...SE winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 4 to 6 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 3 to 5 ft. .SUN...E winds 10 to 15 kt. Seas 3 to 5 ft. .SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. E winds 10 to 15 kt. Seas 4 to 6 ft. .MON...HURRICANE CONDITIONS POSSIBLE. .MON NIGHT...E winds 15 to 25 kt, becoming NE 25 to 35 kt after midnight. Seas 7 to 10 ft. .TUE...NE winds 75 to 85 kt. Seas 10 to 15 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .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 15 kt. Seas 4 to 6 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 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. E winds 10 to 15 kt. Seas 4 to 6 ft. .MON NIGHT...E winds 15 to 25 kt. Seas 5 to 7 ft. .TUE...E winds 15 to 25 kt. Seas 4 to 6 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...The remnant low of Peter is near 22.1N 67.0W 1008 mb at 0300 UTC moving NNW at 4 kt. Maximum sustained winds are 25 kt with gusts to 35 kt. This low will continue to weaken as it drifts northeast of the region through Sat. A cold front will move off the northeast Florida coast tonight, continue to the southeast Thu, stall from 31N77W to near Fort Pierce, Florida by late Thu, then dissipate through early Sun just before a second weak front possibly moves into the region early next week. Farther east, Tropical Depression Eighteen is over the Tropical Atlantic near 10.2N 35.0W 1008 mb at 0300 UTC moving W at 13 kt. Maximum sustained winds 30 kt gusts 40 kt. Eighteen will continue to intensify as it moves across the Atlantic, becoming a hurricane near 12.5N 46.0W by Sat morning and, reaching 55W east of the Leeward Islands by Mon. ATLC waters from 27N to 31N W of 77W .OVERNIGHT...W winds 10 to 15 kt. Seas 4 to 5 ft. .FRI...N winds 10 to 15 kt. Seas 4 to 5 ft. .FRI NIGHT...NW winds less than 10 kt in the evening, becoming variable winds less than 10 kt. Seas 4 to 5 ft. .SAT...NW winds less than 10 kt. Seas 4 to 5 ft. .SAT NIGHT...W winds less than 10 kt. Seas 4 to 5 ft. .SUN...NW winds 10 to 15 kt. Seas 4 ft. .SUN NIGHT...Variable winds less than 10 kt, becoming SW less than 10 kt after midnight. Seas 3 to 4 ft. .MON...NE winds less than 10 kt. Seas 3 to 4 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .TUE...NE winds less than 10 kt. Seas 3 to 4 ft. ATLC waters from 27N to 31N between 65W and 77W .OVERNIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .FRI...W of 70W, S winds 10 to 15 kt, shifting to W in the afternoon. Elsewhere, E winds 15 to 25 kt. Seas 4 to 6 ft. .FRI NIGHT...W of 70W, NW winds 10 to 15 kt in the evening, becoming variable winds less than 10 kt. Elsewhere, N winds 15 to 25 kt. Seas 4 to 6 ft. .SAT...W winds less than 10 kt W of 70W, and NW 10 to 15 kt elsewhere. Seas 4 to 5 ft. .SAT NIGHT...W winds less than 10 kt W of 70W, and NW 10 to 15 kt elsewhere. Seas 4 to 5 ft. .SUN...W of 70W, NW winds 10 to 15 kt. Elsewhere, W winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 4 to 5 ft. .SUN NIGHT...NW winds less than 10 kt. Seas 3 to 4 ft. .MON...NE winds less than 10 kt. Seas 3 to 4 ft. .MON NIGHT...E winds less than 10 kt. Seas 3 to 4 ft. .TUE...E winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 3 ft. Bahamas N of 22N .OVERNIGHT...E winds less than 10 kt. Seas 3 ft. .FRI...Variable winds less than 10 kt. Seas 3 ft in the morning, subsiding to 2 ft or less. .FRI NIGHT...Variable winds less than 10 kt, becoming SE less than 10 kt after midnight. Seas 2 ft or less. .SAT...S winds less than 10 kt. Seas 2 ft or less. .SAT NIGHT...Variable winds less than 10 kt, becoming S less than 10 kt after midnight. Seas 2 ft or less. .SUN...W winds less than 10 kt. Seas 2 ft or less. .SUN NIGHT...E winds less than 10 kt. Seas 2 ft or less, building to 3 ft after midnight. .MON...E winds less than 10 kt. Seas 2 ft or less. .MON NIGHT...E winds less than 10 kt. Seas 2 ft or less. .TUE...E winds less than 10 kt. Seas 2 ft or less. ATLC waters from 22N to 27N between 65W and the Bahamas .OVERNIGHT...NE winds 10 to 15 kt W of 70W, and N 15 to 25 kt elsewhere. Seas 6 to 8 ft. .FRI...N winds 10 to 15 kt W of 70W, and NW 15 to 25 kt elsewhere. Seas 4 to 6 ft. .FRI NIGHT...W of 70W, N winds 10 to 15 kt in the evening, becoming variable winds less than 10 kt. Elsewhere, N winds 10 to 20 kt. Seas 4 to 5 ft. .SAT...NW winds less than 10 kt. Seas 4 to 5 ft. .SAT NIGHT...N winds less than 10 kt. Seas 4 to 5 ft. .SUN...S winds less than 10 kt. Seas 4 ft. .SUN NIGHT...E winds less than 10 kt. Seas 3 to 4 ft. .MON...E winds less than 10 kt. Seas 3 ft. .MON NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 ft. .TUE...W of 70W, E winds less than 10 kt. Elsewhere, SE winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 to 4 ft. ATLC waters S of 22N W of 65W .OVERNIGHT...SW winds 15 to 25 kt. Seas 4 to 6 ft. .FRI...S winds 10 to 20 kt. Seas 3 to 5 ft. .FRI NIGHT...W winds 10 to 15 kt, shifting to SE after midnight. Seas 3 to 5 ft. .SAT...S winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. 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 10 to 15 kt. Seas 3 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .TUE...E winds 10 to 15 kt. Seas 3 to 4 ft. ATLC waters from 19N to 22N between 55W and 65W .OVERNIGHT...SE winds 10 to 20 kt. Seas 5 to 7 ft. .FRI...SE winds 10 to 20 kt. Seas 5 to 6 ft. .FRI NIGHT...SE winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Seas 5 to 6 ft. .SAT...SE winds 10 to 15 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 10 to 15 kt. Seas 3 to 5 ft. .MON...TROPICAL STORM CONDITIONS POSSIBLE. E winds 10 to 15 kt. Seas 4 to 6 ft. .MON NIGHT...E winds 15 to 25 kt. Seas 5 to 7 ft. .TUE...E winds 20 to 30 kt. Seas 6 to 9 ft.