636 FZNT32 KNHC 201409 OFFN21 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1009 AM EDT Thu Sep 20 2018 Marine Weather HF Voice Broadcast for the Gulf of Mexico 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 the Gulf of Mexico .SYNOPSIS...High pressure building over the eastern United States will produce mainly gentle to moderate E to SE breezes and 1 to 4 ft seas across the Gulf through Sun. A trough moving across the Yucatan Peninsula will shift westward across the south central Gulf and Yucatan early today, and across the southwest Gulf this afternoon through Fri, before dissipating Sat. Locally fresh winds are possible with this trough. Gulf of Mexico N of 26N W of 87W .THIS AFTERNOON...SE winds 10 kt. Seas 2 ft or less. .TONIGHT...SE winds 10 to 15 kt. Seas 3 ft. .FRI...SE winds 10 to 15 kt. Seas 3 to 4 ft. .FRI NIGHT...SE winds 10 kt. Seas 3 ft in the evening, subsiding to 2 ft or less. .SAT...SE winds less than 10 kt. Seas 2 ft or less, building to 3 ft in the afternoon. .SAT NIGHT...E winds less than 10 kt. Seas 3 ft. .SUN...E winds less than 10 kt. Seas 2 ft or less. .SUN NIGHT...SE winds less than 10 kt. Seas 2 ft or less. .MON...SE winds 10 kt. Seas 2 ft or less. .MON NIGHT...SE winds 10 kt. Seas 2 ft or less. Gulf of Mexico from 22N to 26N W of 87W .THIS AFTERNOON...SE winds 10 to 15 kt. Seas 3 to 4 ft. .TONIGHT...SE winds 10 to 15 kt. Seas 3 to 4 ft. .FRI...SE winds 10 to 15 kt. Seas 3 to 4 ft. .FRI NIGHT...SE winds less than 10 kt, shifting to E after midnight. Seas 3 to 4 ft. .SAT...SE winds 10 to 15 kt. 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 ft. .SUN NIGHT...E winds less than 10 kt. Seas 2 ft or less. .MON...SE 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. SW Gulf of Mexico S of 22N W of 87W .THIS AFTERNOON...E winds less than 10 kt. Seas 2 ft or less. .TONIGHT...Within 60 nm of coast of Veracruz, E winds less than 10 kt. Elsewhere, E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 2 ft or less. .FRI...SE winds less than 10 kt within 60 nm of coast of Veracruz, and SE 10 to 15 kt elsewhere. Seas 3 to 4 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .SAT...E winds 10 to 15 kt. Seas 3 to 5 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .SUN...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. .SUN NIGHT...E winds less than 10 kt. Seas 2 ft or less. .MON...E winds less than 10 kt. Seas 2 ft or less. .MON NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 2 ft or less. Gulf of Mexico E of 87W .THIS AFTERNOON...E winds less than 10 kt. Seas 2 ft or less. .TONIGHT...E winds less than 10 kt. Seas 2 ft or less. .FRI...E winds 10 kt. Seas 2 ft or less. .FRI NIGHT...E winds 10 kt. Seas 2 ft or less. .SAT...E winds less than 10 kt. Seas 2 ft or less. .SAT NIGHT...E winds 10 kt. Seas 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. .MON...SE winds less than 10 kt. Seas 2 ft or less. .MON NIGHT...E winds less than 10 kt. Seas 2 ft or less.