000 FZNT32 KNHC 181504 OFFN21 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1004 AM EST Tue Dec 18 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...A developing intense low pressure system will move E-NE from Texas to the Carolinas Wed through Thu night, dragging a strong cold front across the Gulf waters. Marine conditions are expected to rapidly deteriorate across the region Thu afternoon as the low pressure deepens. Gale force winds are likely north of 25N across the central and northern Gulf Thu night and Fri. Seas will build to a maximum of around 20 ft on Fri over the central Gulf. Gulf of Mexico N of 26N W of 87W ...GALE CONDITIONS POSSIBLE THU NIGHT THROUGH FRI... .TODAY...E winds 10 to 15 kt. Seas 2 ft or less. .TONIGHT...SE winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft after midnight. .WED...S winds 10 to 15 kt. Seas 3 to 4 ft. .WED NIGHT...W winds 10 to 20 kt. Seas 3 to 5 ft. .THU...NW winds 20 to 30 kt. Seas 5 to 7 ft, building to 8 to 11 ft in the afternoon. .THU NIGHT...NW winds 25 to 35 kt. Seas 13 to 18 ft. .FRI...NW winds 25 to 35 kt. Seas 12 to 20 ft, subsiding to 9 to 14 ft in the afternoon. .FRI NIGHT...NW winds 15 to 25 kt, shifting to W 10 to 15 kt after midnight. Seas 7 to 10 ft, subsiding to 5 to 7 ft after midnight. .SAT...SW winds less than 10 kt, shifting to S in the afternoon. Seas 3 to 5 ft. .SAT NIGHT...S winds less than 10 kt. Seas 3 to 4 ft. Gulf of Mexico from 22N to 26N W of 87W ...GALE CONDITIONS POSSIBLE THU NIGHT AND FRI... .TODAY...SE winds less than 10 kt. Seas 2 ft or less. .TONIGHT...SE winds 10 to 15 kt. Seas 2 to 3 ft. .WED...S winds less than 10 kt. Seas 3 ft. .WED NIGHT...W winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 to 4 ft. .THU...NW winds 20 to 30 kt. Seas 4 to 6 ft, building to 7 to 10 ft in the afternoon. .THU NIGHT...NW winds 25 to 35 kt. Seas 9 to 14 ft, building to 12 to 17 ft after midnight. .FRI...NW winds 25 to 35 kt. Seas 12 to 20 ft, subsiding to 9 to 14 ft in the afternoon. .FRI NIGHT...N winds 10 to 15 kt, shifting to W after midnight. Seas 7 to 10 ft. .SAT...S winds less than 10 kt, shifting to SE in the afternoon. Seas 5 to 7 ft. .SAT NIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. SW Gulf of Mexico S of 22N W of 87W .TODAY...Variable winds less than 10 kt, becoming E less than 10 kt in the afternoon. Seas 2 ft or less. .TONIGHT...SE winds 10 to 15 kt. Seas 2 ft or less, building to 3 to 4 ft after midnight. .WED...SE winds 10 to 15 kt, shifting to S in the afternoon. Seas 3 ft in the morning, subsiding to 2 ft or less. .WED NIGHT...Within 60 nm of coast of Veracruz, NW winds less than 10 kt, increasing to 10 to 15 kt after midnight. Elsewhere, W winds less than 10 kt. Seas 2 ft or less. .THU...NW winds 10 to 20 kt. Seas 2 ft or less, building to 3 to 5 ft in the afternoon. .THU NIGHT...N winds 15 to 25 kt. Seas 7 to 10 ft. .FRI...NW winds 10 to 20 kt. Seas 7 to 10 ft. .FRI NIGHT...E winds less than 10 kt. Seas 6 to 9 ft. .SAT...SE winds less than 10 kt. Seas 4 to 6 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. Gulf of Mexico E of 87W ...GALE CONDITIONS POSSIBLE THU NIGHT THROUGH FRI... .TODAY...NE winds 10 kt. Seas 3 ft. .TONIGHT...E winds 10 kt. Seas 2 ft or less. .WED...SE winds 10 to 15 kt. Seas 3 to 4 ft. .WED NIGHT...S winds 10 to 20 kt. Seas 4 to 6 ft. .THU...SW winds 15 to 25 kt. Seas 7 to 10 ft. .THU NIGHT...W winds 25 to 35 kt. Seas 9 to 14 ft, building to 12 to 17 ft after midnight. .FRI...W winds 25 to 35 kt. Seas 15 to 20 ft. .FRI NIGHT...NW winds 20 to 30 kt, diminishing to 15 to 20 kt after midnight. Seas 14 to 18 ft, subsiding to 10 to 15 ft after midnight. .SAT...NW winds 10 to 15 kt, shifting to N in the afternoon. Seas 8 to 11 ft, subsiding to 6 to 8 ft in the afternoon. .SAT NIGHT...E winds less than 10 kt. Seas 4 to 6 ft.