000 FZNT31 KNHC 182044 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 444 PM EDT Sat Sep 18 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...The Atlantic ridge will shift westward through Sun. This will support fresh to strong winds over the south-central Caribbean and Gulf of Honduras into early Sun. The ridge will weaken starting Sun night as a tropical wave and area of low pressure currently across the central Atlantic along 52W move to the northeast of the Leeward Islands early Mon, then begin to move more NW. There is a high chance this low pressure will form into a tropical cyclone over the next several days. Regardless of further development, expect increase winds, seas and thunderstorms north through east of the Leewards early next week. NW Caribbean W of 85W .TONIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .SUN...E winds 10 to 15 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 to 4 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .TUE...NE winds 10 to 15 kt. Seas 3 ft. .TUE NIGHT...NE winds 10 to 15 kt. Seas 3 ft. .WED...NE winds 10 kt. Seas 2 ft or less. .WED NIGHT...N winds less than 10 kt. Seas 2 ft or less. .THU...Variable winds less than 10 kt. Seas 2 ft or less. .THU NIGHT...Variable winds less than 10 kt. Seas 2 ft or less. Caribbean N of 15N between 72W and 85W .TONIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .SUN...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 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 kt. Seas 3 ft. .WED...E winds 10 kt. Seas 2 ft or less. .WED NIGHT...E winds less than 10 kt. Seas 2 ft or less. .THU...SE winds less than 10 kt. Seas 2 ft or less. .THU NIGHT...E winds less than 10 kt. Seas 2 ft or less. Caribbean from 11N to 15N W of 72W .TONIGHT...NE winds 20 to 25 kt within 90 nm of coast of Colombia, and NE 10 to 20 kt elsewhere. Seas 6 to 8 ft. .SUN...E winds 10 to 20 kt. Seas 5 to 7 ft. .SUN NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. .MON...E winds 10 to 20 kt within 90 nm of coast of Colombia, and E 10 to 15 kt elsewhere. Seas 3 to 5 ft. .MON NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. .TUE...E winds 10 to 15 kt. Seas 3 to 4 ft. .TUE NIGHT...NE 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 ft. .THU...E winds 10 to 15 kt. Seas 3 to 4 ft. .THU NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 to 4 ft. SW Caribbean S of 11N .TONIGHT...NE winds 10 to 15 kt. Seas 6 to 8 ft. .SUN...NE winds 10 to 15 kt. Seas 5 to 7 ft. .SUN NIGHT...N winds 10 kt. Seas 4 to 6 ft. .MON...E winds 10 to 15 kt. Seas 3 to 5 ft. .MON NIGHT...N winds 10 to 15 kt. Seas 3 to 4 ft. .TUE...NE winds 10 kt. Seas 3 to 4 ft. .TUE NIGHT...N winds 10 kt. Seas 3 to 4 ft. .WED...N winds 10 kt. Seas 3 ft. .WED NIGHT...Variable winds less than 10 kt. Seas 3 ft in the evening, subsiding to 2 ft or less. .THU...NW winds 10 kt. Seas 2 ft or less. .THU NIGHT...NW winds less than 10 kt in the evening, becoming variable winds less than 10 kt. Seas 2 ft or less. Caribbean between 64W and 72W .TONIGHT...E winds 15 to 25 kt Gulf of Venezuela, and E 10 to 20 kt elsewhere. Seas 3 to 5 ft. .SUN...NE winds 10 to 20 kt Gulf of Venezuela, and E 10 to 15 kt elsewhere. Seas 3 to 5 ft. .SUN NIGHT...NE winds 15 to 20 kt Gulf of Venezuela, and E 10 to 15 kt elsewhere. Seas 3 to 4 ft. .MON...E winds 10 to 15 kt. Seas 3 to 4 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .TUE...SE winds 10 to 15 kt. Seas 3 to 4 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. .WED...SE winds 10 to 20 kt. Seas 3 to 4 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .THU...E winds 10 to 15 kt. Seas 3 to 4 ft. .THU NIGHT...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 ...GALE WARNING... .TONIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft. .SUN...E winds 10 to 20 kt. Seas 6 to 8 ft. .SUN NIGHT...N to NE winds 10 to 15 kt except variable winds 25 to 35 kt far NE portions. Seas 6 to 9 ft in NE swell. .MON...S winds 10 to 20 kt. Seas 6 to 8 ft. .MON NIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft. .TUE...SE winds 10 to 15 kt. Seas 4 to 6 ft. .TUE NIGHT...E winds 10 kt. Seas 3 to 5 ft. .WED...E winds 10 kt. Seas 3 to 5 ft. .WED NIGHT...E winds 10 kt. Seas 3 to 5 ft. .THU...E winds 10 kt. Seas 4 to 6 ft. .THU NIGHT...E winds 10 kt. Seas 4 to 6 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .TONIGHT...NE winds less than 10 kt. Seas 3 to 5 ft. .SUN...SE winds less than 10 kt. Seas 3 to 5 ft. .SUN NIGHT...E winds less than 10 kt. Seas 3 to 5 ft. .MON...SE 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 kt. Seas 3 to 5 ft. .WED...E winds 10 kt. Seas 3 to 5 ft. .WED NIGHT...E winds 10 kt. Seas 3 to 5 ft. .THU...E winds 10 kt. Seas 4 to 6 ft. .THU NIGHT...E winds 10 kt. Seas 4 to 6 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...Weak ridging through the northern Bahamas will support mostly light breezes and slight seas north of 22N through early next week, and moderate to fresh trade winds and moderate seas south of 22N through Sun. Meanwhile, an area of low pressure currently over the central tropical Atlantic along 52W will approach the waters northeast of the Leeward Islands Sun and Mon then begin to move more NW over open Atlantic waters. There is a high chance this low pressure will form into a tropical cyclone over the next several days. Regardless of further development, expect increase winds, seas and thunderstorms north through east of the Leewards Islands and northeast of Puerto Rico early next week. ATLC waters from 27N to 31N W of 77W .TONIGHT...Variable winds less than 10 kt. Seas 3 to 4 ft. .SUN...E winds less than 10 kt. Seas 3 to 4 ft. .SUN NIGHT...SE winds 10 kt. Seas 3 to 5 ft. .MON...SE winds 10 kt. Seas 3 to 5 ft. .MON NIGHT...SE winds 10 kt. Seas 4 to 5 ft. .TUE...SE winds 10 kt. Seas 4 to 5 ft. .TUE NIGHT...SE winds 10 kt. Seas 4 to 5 ft. .WED...S winds 10 kt. Seas 3 to 5 ft. .WED NIGHT...SW winds 10 kt. Seas 4 to 6 ft. .THU...W winds 10 kt. Seas 4 to 6 ft. .THU NIGHT...NW winds less than 10 kt. Seas 5 to 6 ft. ATLC waters from 27N to 31N between 65W and 77W .TONIGHT...SW winds less than 10 kt. Seas 3 to 4 ft. .SUN...NW winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Seas 3 to 5 ft. .SUN NIGHT...NE winds less than 10 kt. Seas 3 to 5 ft. .MON...E winds 10 to 15 kt. Seas 4 to 6 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .TUE...E winds 10 to 20 kt. Seas 6 to 8 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 6 to 9 ft. .WED...E winds 10 to 20 kt. Seas 6 to 9 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 8 to 11 ft. .THU...E winds 10 to 15 kt. Seas 8 to 11 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 7 to 10 ft. Bahamas N of 22N .TONIGHT...E winds 10 to 15 kt. Seas 2 ft or less. .SUN...E winds 10 to 15 kt. Seas 2 ft or less. .SUN NIGHT...E winds 10 to 15 kt. Seas 3 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 kt. Seas 3 to 5 ft. .WED...E winds 10 kt in the morning, becoming variable winds less than 10 kt. Seas 3 to 5 ft. .WED NIGHT...Variable winds less than 10 kt. Seas 3 ft. .THU...Variable winds less than 10 kt. Seas 3 to 4 ft. .THU NIGHT...Variable winds less than 10 kt. Seas 3 to 4 ft. ATLC waters from 22N to 27N between 65W and the Bahamas ...GALE CONDITIONS POSSIBLE TUE... .TONIGHT...E winds less than 10 kt W of 70W, and E 10 to 15 kt elsewhere. Seas 3 to 5 ft. .SUN...E winds less than 10 kt. Seas 3 to 5 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .MON...E winds 10 to 15 kt. Seas 4 to 6 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 6 to 8 ft. .TUE...E winds 15 to 30 kt. Seas 7 to 10 ft. .TUE NIGHT...NE winds 15 to 30 kt. Seas 7 to 10 ft. .WED...N winds 10 to 20 kt. Seas 7 to 10 ft. .WED NIGHT...N winds 10 to 20 kt. Seas 7 to 10 ft. .THU...NW winds 10 to 15 kt. Seas 7 to 10 ft. .THU NIGHT...NW winds 10 to 15 kt, shifting to N after midnight. Seas 6 to 9 ft. ATLC waters S of 22N W of 65W ...GALE CONDITIONS POSSIBLE TUE... .TONIGHT...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 15 kt. Seas 3 to 5 ft. .MON...E winds 10 to 15 kt. Seas 4 to 6 ft. .MON NIGHT...NE winds 10 to 15 kt. Seas 6 to 8 ft. .TUE...NE winds 15 to 30 kt, diminishing to less than 10 kt in the afternoon. Seas 6 to 8 ft. .TUE NIGHT...E winds less than 10 kt, shifting to S after midnight. Seas 5 to 7 ft. .WED...SW winds 10 to 15 kt. Seas 4 to 6 ft. .WED NIGHT...S winds less than 10 kt. Seas 3 to 5 ft. .THU...SW winds less than 10 kt. Seas 3 to 5 ft. .THU NIGHT...N winds less than 10 kt in the evening, becoming variable winds less than 10 kt. Seas 3 to 5 ft. ATLC waters from 19N to 22N between 55W and 65W ...GALE WARNING... ...GALE CONDITIONS POSSIBLE... .TONIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .SUN...E winds 10 to 20 kt. Seas 7 to 10 ft. .SUN NIGHT...E to SE winds 20 to 35 kt E of 60W, and NE to E 20 to 25 kt elsewhere. Seas 8 to 12 ft in N to NE swell. .MON...E to SE winds 20 to 30 kt. Seas 8 to 12 ft in NE swell. .MON NIGHT...SE winds 10 to 20 kt. Seas 7 to 10 ft. .TUE...SE winds 10 to 20 kt. Seas 7 to 10 ft. .TUE NIGHT...SE winds 10 to 15 kt. Seas 6 to 8 ft. .WED...SE winds 10 to 15 kt. Seas 5 to 7 ft. .WED NIGHT...SE winds 10 kt. Seas 5 to 7 ft. .THU...SE winds 10 kt. Seas 5 to 7 ft. .THU NIGHT...SE winds less than 10 kt. Seas 5 to 7 ft.