000 FZNT31 KNHC 240245 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1045 PM EDT Fri Jul 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...High pressure centered across the central Atlantic extends W-SW to the NW Bahamas tonight. This ridge will weaken through early next week as the high shifts slowly NE and low pressure persists offshore of the NE Florida coast. This will lead to a gradual diminishing in the strength of tradewinds across the basin. Look for scattered squalls and tstms across the NE Caribbean tonight and Sat associated with a fast moving tropical wave. NW Caribbean W of 85W .OVERNIGHT...E winds less than 10 kt. Seas 3 to 4 ft. .SAT...E winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Seas 3 to 4 ft. .SAT NIGHT...E winds less than 10 kt. Seas 3 ft. .SUN...Variable winds less than 10 kt. Seas 3 ft in the morning, subsiding to 2 ft or less. .SUN NIGHT...SE winds less than 10 kt. Seas 2 ft or less. .MON...Variable winds less than 10 kt. Seas 2 ft or less. .MON NIGHT...SE winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 2 ft or less. .TUE...E winds 10 to 15 kt. Seas 3 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .WED...E winds 10 to 15 kt. Seas 3 to 4 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. Caribbean N of 15N between 72W and 85W .OVERNIGHT...E winds 10 to 20 kt S of 18N, and NE less than 10 kt elsewhere. Seas 4 to 6 ft. .SAT...S of 18N, E winds 10 to 15 kt. Elsewhere, NE winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Seas 3 to 5 ft. .SAT NIGHT...NE winds 10 to 15 kt S of 18N, and Variable less than 10 kt elsewhere. Seas 4 to 6 ft S of 18N, and 2 ft or less elsewhere. .SUN...E winds less than 10 kt. Seas 3 to 5 ft S of 18N, and 2 ft or less elsewhere. .SUN NIGHT...E winds less than 10 kt. Seas 3 ft. .MON...SE winds 10 to 15 kt. Seas 3 to 4 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. .TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .WED...E winds 10 to 15 kt. Seas 3 to 5 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. Caribbean from 11N to 15N W of 72W .OVERNIGHT...E winds 15 to 25 kt within 90 nm of coast of Colombia, and NE 10 to 20 kt elsewhere. Seas 6 to 9 ft. .SAT...E winds 10 to 20 kt. Seas 6 to 8 ft. .SAT NIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft. .SUN...E winds 10 to 15 kt. Seas 4 to 6 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .MON...E winds 10 to 15 kt. Seas 3 to 5 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .TUE...E winds 10 to 15 kt. Seas 3 to 5 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .WED...E winds 10 to 15 kt. Seas 3 to 5 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. SW Caribbean S of 11N .OVERNIGHT...NE winds 10 to 15 kt. Seas 6 to 8 ft. .SAT...E winds 10 to 15 kt. Seas 5 to 7 ft. .SAT NIGHT...NE winds less than 10 kt. Seas 4 to 6 ft. .SUN...SE winds less than 10 kt. Seas 3 to 5 ft. .SUN NIGHT...S winds less than 10 kt. Seas 3 to 5 ft. .MON...Variable winds less than 10 kt. Seas 3 to 4 ft. .MON NIGHT...Variable winds less than 10 kt. Seas 3 ft. .TUE...Variable winds less than 10 kt. Seas 2 ft or less. .TUE NIGHT...Variable winds less than 10 kt. Seas 2 ft or less, building to 3 ft after midnight. .WED...E winds less than 10 kt. Seas 3 ft. .WED NIGHT...Variable winds less than 10 kt, becoming NE less than 10 kt after midnight. Seas 3 to 4 ft. Caribbean between 64W and 72W .OVERNIGHT...E winds 15 to 25 kt Gulf of Venezuela, and E 10 to 20 kt elsewhere. Seas 4 to 6 ft. .SAT...E winds 10 to 20 kt Gulf of Venezuela, and E 10 to 15 kt elsewhere. Seas 3 to 4 ft Gulf of Venezuela, and 4 to 6 ft elsewhere. .SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .SUN...Gulf of Venezuela, E winds 10 to 15 kt in the morning, becoming variable winds less than 10 kt,Seas 3 ft in the morning, subsiding to 2 ft or less. Elsewhere, E winds 10 to 15 kt,Seas 3 to 5 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .MON...E winds 10 to 15 kt. Seas 3 to 5 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .TUE...E winds 10 to 15 kt. Seas 3 to 5 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .WED...E winds 10 to 15 kt. Seas 3 to 5 ft. .WED NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .OVERNIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft. .SAT...E winds 10 to 20 kt. Seas 6 to 9 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 5 to 7 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 6 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .TUE...E winds 10 to 15 kt. Seas 3 to 5 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .WED...E winds 10 to 15 kt. Seas 4 to 6 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .OVERNIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .SAT...SE winds 10 to 15 kt. Seas 5 to 7 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .SUN...E winds 10 to 15 kt. Seas 4 to 6 ft. .SUN NIGHT...E winds less than 10 kt. Seas 4 to 6 ft. .MON...E winds less than 10 kt. Seas 3 to 5 ft. .MON NIGHT...E winds less than 10 kt. Seas 3 to 5 ft. .TUE...E winds 10 to 15 kt. Seas 3 to 5 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .WED...E winds 10 to 15 kt. Seas 3 to 5 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...The Atlantic ridge is centered on a 1028 mb high north of the area near 34N43W and extends W-SW to the NW Bahamas. Moderate to fresh trades will prevail south of 25N through Sun. Low pressure near 30N78.5W 1015 mb has a trough that extends S-SW to SE Florida. Environmental conditions are forecast to be marginally conducive for additional development of this low, with potential for it to become a tropical cyclone over the weekend while it meanders just offshore of Florida. Scattered squalls and tstms associated with a fast moving tropical wave will move across the SE waters and north of the Greater Antilles tonight through Sat. ATLC waters from 27N to 31N W of 77W .OVERNIGHT...SW winds 10 to 20 kt. Seas 4 to 6 ft. .SAT...SE winds 10 to 15 kt. Seas 4 to 6 ft. .SAT NIGHT...SE winds 10 to 20 kt. Seas 5 to 7 ft. .SUN...SE winds 10 to 20 kt. Seas 5 to 7 ft. .SUN NIGHT...SE winds 10 to 20 kt. Seas 5 to 7 ft. .MON...S winds 10 to 20 kt. Seas 5 to 7 ft. .MON NIGHT...S winds 10 to 15 kt. Seas 4 ft. .TUE...S winds 10 to 15 kt. Seas 4 ft. .TUE NIGHT...S winds 10 kt. Seas 4 ft. .WED...S winds 10 kt. Seas 3 to 4 ft. .WED NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. ATLC waters from 27N to 31N between 65W and 77W .OVERNIGHT...S winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 4 to 6 ft. .SAT...S winds 10 to 15 kt. Seas 4 to 5 ft. .SAT NIGHT...W of 70W, S winds less than 10 kt, shifting to SE after midnight. Elsewhere, SE winds less than 10 kt. Seas 4 to 5 ft. .SUN...W of 70W, SE winds 10 to 15 kt. Elsewhere, SE winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 4 to 6 ft. .SUN NIGHT...SE winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 4 to 6 ft. .MON...SE winds 10 to 15 kt. Seas 4 to 6 ft. .MON NIGHT...S winds 10 to 15 kt. Seas 4 to 6 ft. .TUE...S winds 10 kt. Seas 4 to 5 ft. .TUE NIGHT...S winds less than 10 kt. Seas 4 to 5 ft. .WED...S winds 10 kt. Seas 4 ft. .WED NIGHT...S winds 10 kt. Seas 4 ft. Bahamas N of 22N .OVERNIGHT...SE winds 10 to 15 kt. Seas 3 ft. .SAT...SE winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 ft. .SAT NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 ft. .SUN...SE winds less than 10 kt. Seas 3 ft. .SUN NIGHT...SE winds less than 10 kt. Seas 3 to 4 ft. .MON...SE winds less than 10 kt. Seas 3 to 4 ft. .MON NIGHT...SE winds less than 10 kt. Seas 3 to 4 ft. .TUE...SE winds less than 10 kt. Seas 3 to 4 ft. .TUE NIGHT...SE winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 to 4 ft. .WED...SE winds 10 to 15 kt. Seas 3 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. ATLC waters from 22N to 27N between 65W and the Bahamas .OVERNIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .SAT...SE winds 10 to 15 kt. Seas 5 to 7 ft. .SAT NIGHT...W of 70W, E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Elsewhere, SE winds 10 to 15 kt. Seas 5 to 7 ft. .SUN...SE winds 10 to 20 kt. Seas 5 to 7 ft. .SUN NIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft. .MON...SE winds 10 to 15 kt. Seas 5 to 7 ft. .MON NIGHT...SE winds 10 to 15 kt. Seas 5 to 6 ft. .TUE...SE winds 10 to 15 kt. Seas 4 to 6 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 5 ft. .WED...E winds 10 to 15 kt. Seas 4 to 5 ft. .WED NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. ATLC waters S of 22N W of 65W .OVERNIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .SAT...E winds 10 to 15 kt. Seas 5 to 7 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .SUN...SE winds 10 to 15 kt. Seas 5 to 7 ft. .SUN NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. .MON...SE winds 10 to 15 kt. Seas 3 to 5 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .TUE...E winds 10 to 15 kt. Seas 4 to 6 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .WED...E winds 10 to 15 kt. Seas 4 to 6 ft. .WED NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. ATLC waters from 19N to 22N between 55W and 65W .OVERNIGHT...E winds 15 to 20 kt. Seas 7 to 9 ft. .SAT...E winds 15 to 20 kt. Seas 7 to 9 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 6 to 8 ft. .SUN...E winds 10 to 20 kt. Seas 5 to 7 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .MON...E winds 10 to 15 kt. Seas 5 to 6 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 5 to 6 ft. .TUE...E winds 15 kt. Seas 5 to 6 ft. .TUE NIGHT...E winds 15 kt. Seas 5 to 6 ft. .WED...E winds 10 to 15 kt. Seas 5 to 6 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 5 to 6 ft.