000 AGXX40 KNHC 301709 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 109 PM EDT Mon Oct 30 2017 Marine Weather Discussion for the Gulf of Mexico, Caribbean Sea, and Tropical North Atlantic from 07N to 19N between 55W and 64W and the Southwest North Atlantic including the Bahamas ...GULF OF MEXICO... High pressure is analyzed over southern Alabama. Gentle to moderate N to NE flow covers the waters E of 90W, with gentle to moderate E to SE flow W of 90W. NW swell has subsided in the SE Gulf to 4 to 6 ft with mainly 2 to ft elsewhere across the basin. The ridge will build through mid week while troughing develops inland from central Louisiana to the Texas coastal plain and NE Mexico which will tigthen the pressure gradient. Return flow will increase to moderate to fresh over western portions, building seas to 4 to 6 ft. The pressure gradient will relax by the end of the week as the troughing dissipates with the ridge axis extending westward. This will allow for winds to diminish slightly over the western portion. The ridging will shift to the central Gulf by the upcoming weekend and become oriented from the NE to the SW. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... A cold front is analyzed from the Windward Passage to between Cuba and Jamaica where it becomes stationary while continuing to the Gulf of Honduras. A surface trough is E of the front extending from eastern Jamaica to the Costa Rica/Nicaragua border. Scattered showers and isolated thunderstorms are occurring within 240 nm NW of the trough. Moderate to fresh N to NE flow and 3 to 5 ft seas prevail W of the trough and front, with mainly gentle flow and 1 to 3 ft seas E of the trough. The front will completely stall by this evening, dissipating through Tue, then will drift W as a remnant trough through mid week. Moderate trades and 2 to 4 ft will prevail across the entire basin by mid week, except 3 to 5 ft seas in the NW Caribbean. Little change is then anticipated through the end of the week and into the upcoming weekend, other than occasional overnight fresh winds off Colombia. ...SW N ATLANTIC INCLUDING THE BAHAMAS... A cold front extends from just W of Bermuda to 27N69W to the Turks and Caicos to the Windward Passage. Scattered showers and isolated thunderstorms are occurring within 120-180 nm E of the front. Fresh to strong winds and seas of 7 to 11 ft are N of 27N W of the front, with fresh to strong S winds N of 30N E of the front. Moderate winds and 4 to 6 ft seas prevail elsewhere W of the front, with gentle to moderate winds and 3 to 5 ft E of the front. Winds will diminish through the afternoon as deep low pressure N of the area lifts out and high pressure builds eastward. The front will stall from 31N64W to northern Haiti tonight. The large mixed swell N of 27N will quickly subside once the front stalls with winds diminishing to 20 kt or less. The front will then retrograde westward as a remnant trough through mid week, becoming diffuse if not dissipating by the end of the week. Much more tranquil marine conditions are expected through the end of the week and into the upcoming weekend. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *For detailed zone descriptions, please visit: http://www.nhc.noaa.gov/abouttafbprod.shtml#OWF Note: gridded marine forecasts are available in the National Digital Forecast Database (NDFD) at: http://www.nhc.noaa.gov/marine/grids.php For additional information, please visit: http://www.nhc.noaa.gov/marine $$ .Forecaster Lewitsky. National Hurricane Center.