000 FZNT27 KNHC 051515 OFFN06 NAVTEX Marine Forecast NWS National Hurricane Center Miami, FL 1115 AM EDT Tue Sep 5 2017 ...Please refer to Coastal Waters Forecasts (CWF) available through NOAA Weather Radio and other means for detailed Coastal Waters Forecasts... .SYNOPSIS...A surface low has developed near 22N97W 1011 mb and is along a low level NNW to SSE orientated trough across the W-Central and SW Gulf waters. The low is expected to drift SE along the trough through Thu and then meander, possibly developing into a tropical cyclone. A weak cold front will sink SE across the NW and N Gulf Wed, before stalling from the NE Gulf to central Gulf Fri, then lifting N while dissipating Sat. Hurricane Irma is forecast to approach the Straits of Florida Fri night, and reach near 24.0N 81.0W Sat night as a major hurricane. Northwest Gulf of Mexico .THIS AFTERNOON...NE to E winds 5 to 10 kt. Seas 2 ft or less. Scattered showers. .TONIGHT...E winds 5 to 10 kt. Seas 2 ft or less. Scattered showers. .WED...N to NE winds 15 to 20 kt. Seas 2 ft or less, building to 3 ft in the afternoon. .WED NIGHT...NE winds 15 to 20 kt. Seas 3 to 5 ft. .THU...NE to E winds 20 to 25 kt. Seas 3 to 6 ft. .THU NIGHT...NE to E winds 20 to 25 kt. Seas 3 to 6 ft. .FRI...NE to E winds 20 to 25 kt. Seas 3 to 6 ft. .FRI NIGHT...NE to E winds 20 to 25 kt. Seas 3 to 6 ft. .SAT...NE winds 15 to 20 kt. Seas 3 to 5 ft. North Central and Northeast Gulf of Mexico .THIS AFTERNOON...NE to E winds 5 to 10 kt. Seas 2 ft or less. Scattered showers. .TONIGHT...S winds 5 to 10 kt, shifting to W after midnight. Seas 2 ft or less. .WED...NW to N winds 5 to 10 kt. Seas 2 ft or less. .WED NIGHT...NW to N winds 5 to 10 kt, becoming N to NE 15 to 20 kt after midnight. Seas 2 ft or less, building to 3 ft after midnight. .THU...NE winds 20 to 25 kt. Seas 3 to 5 ft. .THU NIGHT...NE winds 15 to 20 kt. Seas 3 to 5 ft. .FRI...NE winds 15 to 20 kt. Seas 3 to 4 ft. .FRI NIGHT...NE winds 15 to 20 kt. Seas 3 to 4 ft. .SAT...NE winds 20 to 25 kt. Seas 3 to 7 ft.