580 FZNT32 KNHC 191455 OFFN21 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 955 AM EST Thu Dec 19 2019 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...Strong high pressure over the Ohio Valley is supporting strong N to NE winds over the SE half of the Gulf behind a slow moving cold front in the NW Caribbean. Winds and seas will gradually diminish today as the high shifts northeastward. Strong NE to E winds will continue across the E Gulf and through the Straits of Florida through Fri night as the cold front stalls. A N to S aligned surface trough will develop across the central Gulf Fri, with strong E winds covering the Gulf E of trough. Low pressure is expected to develop from the trough over NE Gulf by early Sat and move E across northern Florida this weekend. Gale force winds are possible in the NE Gulf late Sat through Sat night. Gulf of Mexico N of 26N W of 87W .TODAY...NE winds 10 to 20 kt. Seas 6 to 8 ft. .TONIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .FRI...E winds 10 to 20 kt. Seas 6 to 8 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft. .SAT...NE winds 15 to 25 kt. Seas 7 to 10 ft. .SAT NIGHT...N winds 15 to 25 kt. Seas 8 to 11 ft, building to 9 to 14 ft after midnight. .SUN...NW winds 15 to 25 kt. Seas 8 to 13 ft. .SUN NIGHT...NW winds 20 to 30 kt. Seas 8 to 13 ft. .MON...NW winds 20 to 30 kt. Seas 8 to 13 ft. .MON NIGHT...N winds 15 to 25 kt. Seas 6 to 9 ft. Gulf of Mexico from 22N to 26N W of 87W .TODAY...NE winds 10 to 20 kt. Seas 7 to 10 ft. .TONIGHT...NE winds 10 to 20 kt. Seas 6 to 8 ft. .FRI...NE winds 10 to 15 kt. Seas 5 to 7 ft. .FRI NIGHT...NE winds 10 to 15 kt. Seas 6 to 9 ft. .SAT...N winds 10 to 20 kt. Seas 6 to 9 ft. .SAT NIGHT...NW winds 10 to 20 kt. Seas 6 to 9 ft. .SUN...NW winds 15 to 25 kt. Seas 7 to 10 ft. .SUN NIGHT...NW winds 15 to 25 kt. Seas 7 to 10 ft. .MON...NW winds 15 to 25 kt. Seas 8 to 11 ft. .MON NIGHT...N winds 15 to 25 kt. Seas 7 to 10 ft. SW Gulf of Mexico S of 22N W of 87W .TODAY...N winds 10 to 20 kt. Seas 7 to 10 ft. .TONIGHT...Within 60 nm of coast of Veracruz, N winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Elsewhere, NE winds 10 to 20 kt. Seas 6 to 9 ft. .FRI...N winds less than 10 kt within 60 nm of coast of Veracruz, and NE 10 to 15 kt elsewhere. Seas 4 to 6 ft. .FRI NIGHT...Within 60 nm of coast of Veracruz, N winds less than 10 kt, shifting to NW after midnight. Elsewhere, NE winds 10 to 15 kt. Seas 3 to 5 ft. .SAT...N winds 10 to 15 kt. Seas 4 to 6 ft. .SAT NIGHT...N winds 10 to 20 kt. Seas 6 to 8 ft. .SUN...N winds 15 to 25 kt. Seas 6 to 9 ft. .SUN NIGHT...N winds 10 to 20 kt. Seas 7 to 10 ft. .MON...NW winds 10 to 20 kt. Seas 6 to 8 ft. .MON NIGHT...N winds 10 to 15 kt. Seas 5 to 7 ft. Gulf of Mexico E of 87W ...GALE CONDITIONS POSSIBLE SAT... .TODAY...NE winds 15 to 25 kt. Seas 8 to 11 ft. .TONIGHT...NE winds 15 to 25 kt. Seas 7 to 10 ft. .FRI...E winds 15 to 25 kt. Seas 8 to 11 ft. .FRI NIGHT...E winds 15 to 25 kt. Seas 8 to 11 ft. .SAT...E winds 15 to 30 kt. Seas 7 to 10 ft. .SAT NIGHT...E to SE winds 20 to 30 kt NE portions, and NW winds 15 to 25 kt SW portions. Seas 8 to 11 ft. .SUN...W winds 15 to 25 kt. Seas 7 to 10 ft. .SUN NIGHT...W winds 15 to 25 kt. Seas 8 to 11 ft. .MON...W winds 20 to 30 kt. Seas 10 to 15 ft. .MON NIGHT...NW winds 20 to 25 kt. Seas 10 to 15 ft.