000 FZNT27 KNHC 200850 OFFN06 NAVTEX Marine Forecast NWS National Hurricane Center Miami, FL 450 AM EDT Thu Jul 20 2017 ...Please refer to Coastal Waters Forecasts (CWF) available through NOAA Weather Radio and other means for detailed Coastal Waters Forecasts... .SYNOPSIS...Weak high pressure will persist across the northern Gulf through Mon night. A thermal trough will develop in the Yucatan Peninsula each evening before pushing offshore into the SW Gulf each night. The trough will drift westward during the overnight hours, and dissipate in the SW Gulf each morning. Northwest Gulf of Mexico .TODAY...SW winds 5 to 10 kt, shifting to W to NW in the morning, then, shifting to NE in the afternoon. Seas 2 ft or less. .TONIGHT...S winds 5 to 10 kt. Seas 2 ft or less. .FRI...S to SW winds 5 to 10 kt, shifting to SE in the afternoon. Seas 2 ft or less. Scattered showers and isolated thunderstorms. .FRI NIGHT...S winds 10 to 15 kt. Seas 2 ft or less. .SAT...S winds 10 to 15 kt. Seas 2 ft or less. .SAT NIGHT...S winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft late. .SUN...S winds 10 to 15 kt. Seas 3 to 4 ft. .SUN NIGHT...S winds 15 to 20 kt. Seas 3 to 5 ft. .MON...S winds 15 to 20 kt. Seas 3 to 5 ft. .MON NIGHT...SE to S winds 10 to 15 kt. Seas 3 to 5 ft. North Central and Northeast Gulf of Mexico .TODAY...NE winds less than 5 kt. Seas 2 ft or less. Scattered showers and isolated thunderstorms. .TONIGHT...SW winds less than 5 kt. Seas 2 ft or less. .FRI...W winds less than 5 kt, shifting to S in the afternoon. Seas 2 ft or less. .FRI NIGHT...S to SW winds 5 to 10 kt. Seas 2 ft or less. .SAT...SW winds 5 to 10 kt. Seas 2 ft or less. .SAT NIGHT...SW winds 5 to 10 kt. Seas 2 ft or less. .SUN...SW to W winds 5 to 10 kt. Seas 2 ft or less. .SUN NIGHT...SW winds 10 to 15 kt. Seas 2 ft or less. .MON...SW to W winds 5 to 10 kt. Seas 2 ft or less. .MON NIGHT...SW winds 10 to 15 kt. Seas 2 ft or less.