000 AGXX40 KNHC 091834 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 234 PM EDT Mon Oct 9 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... The most recent scatterometer pass indicate 15 to 20 kt winds over the NE Gulf off the western Florida Panhandle, and just off the coast of Texas. Seas are 4 to 6 ft over the northern Gulf in decaying southerly swell, 3 to 4 ft over the NW Gulf, and 2 to 4 ft elsewhere. Otherwise, a weak ridge dominates the Gulf waters producing generally a light to moderate anticyclonic wind flow. Little change is expected into Tue. Then, the ridge will begin to retreat E on Tuesday as a weak cold front moves across eastern Texas. The cold front is forecast to move off the SW Louisiana and Texas coasts late Tuesday, reach from near the Mobile Bay to the SW Gulf late Wednesday and from northern Florida to SW Gulf on Thursday while becoming stationary across the western Gulf. Then, the front will become diffuse on Friday. Fresh to strong northerly flow will funnel along the coast of Mexico to Veracruz through Thu as a high pressure builds along the eastern slopes of the Sierra Madre Mountains. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... Latest scatterometer data show SE winds in the 15-20 kt range across the western Caribbean, including the Gulf of Honduras, and fresh NE winds across the Gulf of Venezuela. Light and gentle winds are noted elsewhere. Seas are 4-5 ft S of 20N W of 85W, and 4 ft near the coast of Colombia based on an altimeter passes, with seas of 2-3 ft across the remainder of the basin. A ridge extending across western Cuba into the western Caribbean will support moderate to occasionally fresh east to southeast winds over the western Caribbean, primarily in the Gulf of Honduras during overnight hours. A pair of trough moving across the SW N Atlantic will result in a weak pressure gradient across much of the area, with mainly gentle to moderate winds and seas generally under 4 ft. Little change is expected on Tuesday. A tropical wave currently just west of Barbados will move across the eastern Caribbean through late Tuesday, and across the central Caribbean Wednesday through Fri. Winds and seas will slightly increase behind the wave axis. ...SW N ATLANTIC INCLUDING THE BAHAMAS... A ridge dominates most of the forecast waters while a trough extends across the NW Bahamas to eastern Cuba. Experimental GOES-16 shows a well defined swirl of low clouds along the trough axis near 22.5N76W. An area of fresh to strong easterly winds, with seas to 8 ft E of the Bahamas, is noted in the wake of the trough, forecast to move across south Florida and the Straits of Florida this evening and tonight, producing winds of 15-20 kt and seas of 4-6 ft in the Straits of Florida. The northern extension of the tropical wave currently located along 60W will move across the Atlantic waters as a trough, affecting forecast zone AMZ127 with fresh to strong winds and seas of 7-10 ft in NE swell through Tuesday morning. The pressure gradient between this developing trough and high pressure N of the forecast region is already resulting in an area of fresh to strong easterly winds between 54W and 63W based on a recent Ascat pass and buoy 41049 located near 27.5N63W. As the trough moves WNW or NW across the SW N Atlantic expect increasing winds and building seas E of the Bahamas through at least Thursday. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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 GR. National Hurricane Center.