000 FZNT27 KNHC 201506 OFFN06 NAVTEX Marine Forecast NWS National Hurricane Center Miami, FL 1106 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 Sat, then the ridge will build westward on Sun. 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 .THIS AFTERNOON...NE winds less than 5 kt. Seas 2 ft or less. .TONIGHT...SE to 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. .FRI NIGHT...SE to S winds 10 to 15 kt. Seas 2 ft or less. .SAT...S to SW 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 to 4 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...SE to 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 .THIS AFTERNOON...NE winds less than 5 kt. Seas 2 ft or less. .TONIGHT...SW winds less than 5 kt. Seas 2 ft or less. .FRI...S winds less than 5 kt. Seas 2 ft or less. .FRI NIGHT...S to SW winds 5 to 10 kt. Seas 2 ft or less. .SAT...S to SW winds 5 to 10 kt. Seas 2 ft or less. .SAT NIGHT...SW winds 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 10 to 15 kt. Seas 2 ft or less. .MON NIGHT...SW winds 10 to 15 kt. Seas 2 ft or less.