000 FZNT31 KNHC 061501 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1101 AM EDT Sun Aug 6 2017 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 ATLC from 07N to 19N between 55W and 64W .SYNOPSIS...A surface low is developing near 14N81W along a tropical wave. The low, or possibly a tropical cyclone, will move NW to near 17.5N78W on Mon evening and move over the Yucatan Peninsula late Mon night. Strong to near gale force E winds, building seas and strong TSTMS will shift W across the NW Caribbean through early Tue. Strong winds and building seas will arrive near 17N55W on Tue ahead of a tropical wave that will cross 55W on Wed evening. Conditions will be favorable for tropical cyclone formation as the low continues NW across the Leewards on Thu evening. NW Caribbean W of 85W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 to 5 ft. .TONIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .MON...E winds 10 to 20 kt. Seas 5 to 7 ft. .MON NIGHT...SE winds 15 to 25 kt. Seas 6 to 9 ft. .TUE...SE winds 15 to 25 kt. Seas 6 to 9 ft. .TUE NIGHT...SE winds 10 to 20 kt. Seas 4 to 6 ft. .WED...SE winds 10 to 20 kt. Seas 4 to 6 ft. .WED NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .THU...SE winds 10 to 20 kt. Seas 4 to 6 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. Caribbean N of 15N between 72W and 85W .THIS AFTERNOON...E winds 15 to 25 kt S of 18N, and E 10 to 20 kt elsewhere. Seas 6 to 9 ft S of 18N, and 4 to 6 ft elsewhere. .TONIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .MON...E winds 10 to 20 kt. Seas 5 to 7 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 4 to 6 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 20 kt. Seas 4 to 6 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .THU...E winds 10 to 20 kt. Seas 4 to 6 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. Caribbean from 11N to 15N W of 72W .THIS AFTERNOON...E winds 10 to 20 kt. Seas 5 to 7 ft. .TONIGHT...E winds 15 to 25 kt within 90 nm of coast of Colombia, and E 10 to 20 kt elsewhere. Seas 5 to 7 ft. .MON...E winds 10 to 20 kt. Seas 5 to 7 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .TUE...E winds 10 to 15 kt. Seas 4 to 6 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .WED...E winds 10 to 20 kt. Seas 4 to 6 ft. .WED NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .THU...E winds 10 to 20 kt. Seas 4 to 6 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. SW Caribbean S of 11N .THIS AFTERNOON...Variable winds less than 10 kt. Seas 3 to 5 ft. .TONIGHT...Variable winds less than 10 kt, becoming E less than 10 kt after midnight. Seas 3 to 5 ft. .MON...SE winds less than 10 kt. Seas 3 to 5 ft. .MON NIGHT...Variable winds less than 10 kt. Seas 3 to 5 ft. .TUE...Variable winds less than 10 kt. Seas 3 to 4 ft. .TUE NIGHT...Variable winds less than 10 kt. Seas 3 to 4 ft. .WED...Variable winds less than 10 kt. Seas 3 to 4 ft. .WED NIGHT...Variable winds less than 10 kt. Seas 3 to 4 ft. .THU...Variable winds less than 10 kt. Seas 3 to 4 ft. .THU NIGHT...N winds less than 10 kt. Seas 3 to 5 ft. Caribbean between 64W and 72W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 to 4 ft Gulf of Venezuela, and 4 to 6 ft elsewhere. .TONIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .MON...E winds 10 to 20 kt. Seas 4 to 6 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .TUE...E winds 10 to 20 kt. Seas 3 to 5 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .WED...E winds 10 to 20 kt. Seas 4 to 6 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .THU...E winds 10 to 15 kt. Seas 4 to 6 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 to 4 ft. .TONIGHT...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...E winds 10 to 20 kt. Seas 4 to 6 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .WED...E winds 10 to 20 kt. Seas 4 to 6 ft. .WED NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .THU...E winds 10 to 20 kt. Seas 5 to 7 ft. .THU 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 .THIS AFTERNOON...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 ft. .TONIGHT...E winds 10 to 15 kt. Seas 3 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. .TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .WED...SE winds 10 to 15 kt. Seas 3 to 5 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .THU...E winds 10 to 15 kt. Seas 3 to 5 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. SYNOPSIS FOR THE SW N ATLC INCLUDING THE BAHAMAS .SYNOPSIS...A surface high ridging W to NE Florida will be centered near 30N70W through Thu. The northern extent of a tropical wave currently along 81W will continue W with fresh E trades shifting W across the Old Bahama Channel through Mon evening. An area of building seas will reach 20N55W on Tue evening ahead of a tropical low that will reach the Leewards on Thu evening amid favorable environmental conditions for tropical cyclone formation. ATLC waters from 27N to 31N W of 77W .THIS AFTERNOON...S winds 10 kt. Seas 3 ft. .TONIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft. .MON...SE winds 10 to 15 kt. Seas 3 to 4 ft. .MON NIGHT...SE winds 10 to 15 kt. Seas 3 ft. .TUE...SE winds 10 to 15 kt. Seas 3 ft. .TUE NIGHT...SE winds 10 kt. Seas 3 ft. .WED...SE winds 10 kt. Seas 3 ft. .WED NIGHT...SE winds 10 kt. Seas 3 ft. .THU...SE winds 10 kt. Seas 3 ft. .THU NIGHT...SE winds 10 kt. Seas 3 ft. ATLC WATERS FROM 27N TO 31N BETWEEN 65W AND 77W .THIS AFTERNOON...E winds less than 10 kt. Seas 2 ft or less. .TONIGHT...E winds 10 to 15 kt W of 70W, and E less than 10 kt elsewhere. Seas 2 to 3 ft. .MON...SE winds 10 to 15 kt W of 70W, and E less than 10 kt elsewhere. Seas 3 to 4 ft. .MON NIGHT...SE winds 10 to 15 kt W of 70W, and E less than 10 kt elsewhere. 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. Seas 3 ft. .WED...E winds less than 10 kt. Seas 3 ft. .WED NIGHT...SE winds 10 kt. Seas 3 ft. .THU...SE winds 10 kt. Seas 3 ft. .THU NIGHT...E winds 10 kt. Seas 3 to 4 ft. Bahamas N of 22N .THIS AFTERNOON...E winds 10 to 15 kt. Seas 2 ft or less. .TONIGHT...E winds 10 to 20 kt. Seas 2 ft or less. .MON...E winds 10 to 20 kt. Seas 2 to 3 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 2 ft or less. .TUE...E winds 10 to 20 kt. Seas 2 ft or less. .TUE NIGHT...E winds 10 to 15 kt. Seas 2 ft or less. .WED...E winds 10 to 15 kt. Seas 2 ft or less. .WED NIGHT...E winds 10 to 15 kt. Seas 2 ft or less. .THU...E winds 10 to 15 kt. Seas 2 ft or less. .THU NIGHT...E winds 10 to 15 kt. Seas 2 ft or less. ATLC waters from 22N to 27N between 65W and the Bahamas .THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 to 4 ft. .TONIGHT...E winds 10 to 15 kt. Seas 3 to 4 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 4 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .THU...E winds 10 to 15 kt. Seas 3 to 5 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. ATLC waters S of 22N W of 65W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 to 5 ft. .TONIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .MON...E winds 10 to 20 kt. Seas 3 to 5 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .TUE...E winds 10 to 15 kt. Seas 3 to 5 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .WED...E winds 10 to 20 kt. Seas 3 to 5 ft. .WED NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .THU...E winds 10 to 20 kt. Seas 4 to 6 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. ATLC waters from 19N to 22N between 55W and 65W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 to 4 ft. .TONIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .MON...E winds 10 to 15 kt. Seas 4 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 4 ft. .TUE...E winds 10 to 20 kt. Seas 4 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .WED...E winds 10 to 20 kt. Seas 4 to 6 ft. .WED NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft. .THU...E winds 10 to 20 kt. Seas 6 to 8 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft.