187 FZNT31 KNHC 130304 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1104 PM EDT Tue Oct 12 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...A tropical wave along 64W will move westward through tonight, and spread fresh winds and very active weather across the extreme NE Caribbean and adjacent Atlc waters. Northerly swell will build across the regional Atlc and move through the Caribbean passages through late Wed. Active weather associated with an upper level trough along 59W will continue through Wed morning. Low pres is expected to develop E of the southern Bahamas on Thu and drift eastward into the weekend. This will weaken the pressure gradient across the Caribbean basin leading to tranquil marine conditions. NW Caribbean W of 85W .OVERNIGHT...E winds less than 10 kt. Seas 3 ft. .WED...E winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Seas 3 ft. .WED NIGHT...E winds less than 10 kt. Seas 2 ft or less, building to 3 ft after midnight. .THU...SE winds less than 10 kt. Seas 3 ft. .THU NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 ft. .FRI...E winds less than 10 kt. Seas 3 ft. .FRI NIGHT...E winds less than 10 kt. Seas 2 ft or less. .SAT...Variable winds less than 10 kt. Seas 2 ft or less. .SAT NIGHT...NE winds less than 10 kt. Seas 2 ft or less. .SUN...NE winds less than 10 kt. Seas 2 ft or less. .SUN NIGHT...NE winds less than 10 kt. Seas 2 ft or less, building to 3 ft after midnight. Caribbean N of 15N between 72W and 85W .OVERNIGHT...E winds less than 10 kt. Seas 3 to 4 ft. .WED...E winds less than 10 kt. Seas 3 to 5 ft S of 18N, and 2 ft or less elsewhere. .WED NIGHT...E winds less than 10 kt. Seas 3 to 5 ft S of 18N, and 2 ft or less elsewhere. .THU...E winds less than 10 kt. Seas 3 to 5 ft S of 18N, and 2 ft or less elsewhere. .THU NIGHT...E winds less than 10 kt. Seas 3 to 4 ft. .FRI...E winds less than 10 kt. Seas 3 ft in the morning, subsiding to 2 ft or less. .FRI NIGHT...E winds less than 10 kt. Seas 2 ft or less. .SAT...E winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Seas 2 ft or less. .SAT NIGHT...NE winds less than 10 kt. Seas 2 ft or less. .SUN...NE winds less than 10 kt. Seas 2 ft or less. .SUN NIGHT...NE winds less than 10 kt. Seas 2 ft or less. Caribbean from 11N to 15N W of 72W .OVERNIGHT...E winds 10 to 15 kt within 90 nm of coast of Colombia, and NE less than 10 kt elsewhere. Seas 3 to 5 ft. .WED...S winds 10 to 15 kt within 90 nm of coast of Colombia, and E less than 10 kt elsewhere. Seas 3 to 5 ft. .WED NIGHT...NE winds less than 10 kt. Seas 3 to 4 ft. .THU...E winds less than 10 kt. Seas 3 to 4 ft. .THU NIGHT...Variable winds less than 10 kt. Seas 3 to 4 ft. .FRI...Variable winds less than 10 kt. Seas 3 ft. .FRI NIGHT...Variable winds less than 10 kt. Seas 3 ft. .SAT...Variable winds less than 10 kt. Seas 3 ft. .SAT NIGHT...Variable winds less than 10 kt. Seas 3 ft in the evening, subsiding to 2 ft or less. .SUN...E winds less than 10 kt. Seas 2 ft or less. .SUN NIGHT...E winds less than 10 kt. Seas 2 ft or less. SW Caribbean S of 11N .OVERNIGHT...Variable winds less than 10 kt. Seas 3 ft. .WED...W winds less than 10 kt. Seas 3 ft. .WED NIGHT...NW winds less than 10 kt. Seas 3 ft. .THU...Variable winds less than 10 kt. Seas 3 ft. .THU NIGHT...NW winds less than 10 kt in the evening, becoming variable winds less than 10 kt. Seas 3 ft in the evening, subsiding to 2 ft or less. .FRI...Variable winds less than 10 kt. 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...Variable winds less than 10 kt. Seas 2 ft or less. .SUN...Variable winds less than 10 kt. Seas 2 ft or less. .SUN NIGHT...Variable winds less than 10 kt. Seas 2 ft or less. Caribbean between 64W and 72W .OVERNIGHT...E winds 10 to 15 kt. Seas 4 to 5 ft. .WED...Gulf of Venezuela, E winds less than 10 kt, shifting to SW in the afternoon. Elsewhere, SE winds 10 to 15 kt. Seas 4 to 6 ft. .WED NIGHT...Gulf of Venezuela, NW winds 10 to 15 kt, shifting to SE after midnight. Elsewhere, E winds 10 to 15 kt. Seas 2 ft or less Gulf of Venezuela, and 3 to 5 ft elsewhere. .THU...Gulf of Venezuela, SW winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Elsewhere, SE winds 10 to 15 kt. Seas 2 ft or less Gulf of Venezuela, and 3 to 5 ft elsewhere. .THU NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 to 5 ft. .FRI...E winds less than 10 kt. Seas 3 to 4 ft. .FRI NIGHT...E winds less than 10 kt. Seas 3 to 4 ft. .SAT...E winds less than 10 kt. Seas 3 to 4 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .SUN...E winds less than 10 kt. Seas 3 to 4 ft. .SUN NIGHT...E winds less than 10 kt. Seas 3 ft. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .OVERNIGHT...E winds 10 to 15 kt. Seas 6 to 9 ft. .WED...SE winds 10 to 15 kt. Seas 6 to 9 ft. .WED NIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft. .THU...SE winds 10 to 15 kt. Seas 5 to 7 ft. .THU NIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft. .FRI...S winds 10 to 15 kt. Seas 4 to 6 ft. .FRI NIGHT...S winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Seas 4 to 6 ft. .SAT...S winds less than 10 kt. Seas 3 to 5 ft. .SAT NIGHT...S winds less than 10 kt in the evening, becoming variable winds less than 10 kt. Seas 3 to 5 ft. .SUN...Variable winds less than 10 kt. Seas 3 to 5 ft. .SUN NIGHT...Variable winds less than 10 kt. Seas 3 to 5 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .OVERNIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .WED...E winds 10 to 20 kt. Seas 6 to 8 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 6 to 8 ft. .THU...E winds 10 to 15 kt. Seas 5 to 7 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .FRI...SE winds 10 to 15 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 3 to 5 ft. .SUN...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 to 5 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...High pressure centered over the central Atlantic will shift slowly E and weaken through the end of the week. A low level trough extends from the southern Bahamas to 28N71W. Very active weather is expected with this trough through Wed as it drifts eastward. Low pres may form along the trough by Thu as it shifts E of 60W. Northerly swell across the regional waters will peak tonight E of 70W then begin to fade Wed. ATLC waters from 27N to 31N W of 77W .OVERNIGHT...E winds 10 kt. Seas 5 ft. .WED...NE winds 10 kt. Seas 4 to 5 ft. .WED NIGHT...NE winds 10 to 15 kt. Seas 4 to 5 ft. .THU...NE winds 10 to 15 kt. Seas 4 to 5 ft. .THU NIGHT...NE winds 10 to 15 kt. Seas 4 to 5 ft. .FRI...NE winds 10 to 15 kt. Seas 4 to 5 ft. .FRI NIGHT...E winds less than 10 kt. Seas 4 to 5 ft. .SAT...Variable winds less than 10 kt. Seas 3 to 5 ft. .SAT NIGHT...Variable winds less than 10 kt, becoming NW less than 10 kt after midnight. Seas 3 to 4 ft. .SUN...N winds 10 to 20 kt. Seas 5 to 7 ft. .SUN NIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft. ATLC waters from 27N to 31N between 65W and 77W .OVERNIGHT...SE winds less than 10 kt. Seas 5 to 7 ft. .WED...E winds less than 10 kt. Seas 5 to 6 ft. .WED NIGHT...NE winds 10 to 15 kt W of 70W, and S less than 10 kt elsewhere. Seas 5 to 6 ft. .THU...N winds 10 to 15 kt W of 70W, and NW less than 10 kt elsewhere. Seas 5 to 6 ft. .THU NIGHT...N winds 10 to 15 kt. Seas 4 to 6 ft. .FRI...N winds 10 to 15 kt. Seas 4 to 5 ft. .FRI NIGHT...NE winds less than 10 kt. Seas 4 to 5 ft. .SAT...NE winds less than 10 kt. Seas 4 to 5 ft. .SAT NIGHT...Variable winds less than 10 kt. Seas 3 to 4 ft. .SUN...Variable winds less than 10 kt. Seas 3 to 4 ft. .SUN NIGHT...NE winds less than 10 kt. Seas 4 to 6 ft. Bahamas N of 22N .OVERNIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. .WED...NE winds less than 10 kt. Seas 3 to 5 ft. .WED NIGHT...NE winds less than 10 kt. Seas 3 to 4 ft. .THU...NE winds less than 10 kt. Seas 3 to 4 ft. .THU NIGHT...NE winds less than 10 kt. Seas 3 to 4 ft. .FRI...NE winds less than 10 kt. Seas 3 to 4 ft. .FRI NIGHT...NE winds less than 10 kt. Seas 3 ft. .SAT...NE winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Seas 3 ft. .SAT NIGHT...NE winds less than 10 kt. Seas 2 ft or less. .SUN...NE winds less than 10 kt. Seas 2 ft or less. .SUN NIGHT...NE winds 10 to 15 kt. Seas 2 ft or less. ATLC waters from 22N to 27N between 65W and the Bahamas .OVERNIGHT...E winds 10 to 15 kt. Seas 6 to 8 ft. .WED...SE winds 10 to 15 kt. Seas 6 to 8 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 6 to 7 ft. .THU...W of 70W, NE winds 10 to 15 kt. Elsewhere, S winds less than 10 kt, shifting to N in the afternoon. Seas 5 to 6 ft. .THU NIGHT...N winds 10 to 15 kt. Seas 5 to 6 ft. .FRI...N winds 10 kt. Seas 4 to 5 ft. .FRI NIGHT...N winds less than 10 kt. Seas 4 ft. .SAT...N winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Seas 3 to 4 ft. .SAT NIGHT...Variable winds less than 10 kt. Seas 3 to 4 ft. .SUN...Variable winds less than 10 kt. Seas 3 to 4 ft. .SUN NIGHT...Variable winds less than 10 kt. Seas 3 to 4 ft. ATLC waters S of 22N W of 65W .OVERNIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft. .WED...S winds 10 to 15 kt, shifting to SW in the afternoon. Seas 5 to 7 ft. .WED NIGHT...SW winds less than 10 kt. Seas 4 to 6 ft. .THU...W winds 10 to 15 kt. Seas 3 to 5 ft. .THU NIGHT...W winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Seas 3 to 5 ft. .FRI...NW winds 10 to 15 kt. Seas 3 to 5 ft. .FRI NIGHT...N winds less than 10 kt. Seas 3 to 5 ft. .SAT...NE winds less than 10 kt. Seas 3 to 4 ft. .SAT NIGHT...NE winds less than 10 kt. Seas 3 to 4 ft. .SUN...NE winds less than 10 kt. Seas 3 to 4 ft. .SUN NIGHT...NE winds less than 10 kt. Seas 3 to 4 ft. ATLC waters from 19N to 22N between 55W and 65W .OVERNIGHT...SE winds 10 to 15 kt. Seas 8 to 9 ft. .WED...SE winds 10 to 15 kt. Seas 7 to 9 ft. .WED NIGHT...SE winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 6 to 7 ft. .THU...S winds 10 to 15 kt. Seas 6 to 7 ft. .THU NIGHT...SW winds 10 to 20 kt. Seas 5 to 6 ft. .FRI...SW winds 10 to 20 kt. Seas 5 to 7 ft. .FRI NIGHT...SW winds 10 to 20 kt. Seas 5 to 7 ft. .SAT...SW winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 4 to 6 ft. .SAT NIGHT...W winds less than 10 kt. Seas 4 to 5 ft. .SUN...NW winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Seas 4 to 5 ft. .SUN NIGHT...N winds less than 10 kt. Seas 4 to 5 ft.