000 AGXX40 KNHC 201811 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 111 PM EST Wed Nov 20 2019 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 over the central Gulf will shift eastward today. Fresh to locally strong SE return flow will develop over the NW Gulf tonight into Thu ahead of a cold front moving over Texas. The front will move into the NW Gulf late Fri night, cross the region Sat through Sun, then weaken and stall over the southern Gulf Sun night. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... Tropical Storm Sebastien is centered NE of the northern Leeward Islands near 21.1N 61.7W 1002 mb at 10 AM EST moving W at 6 kt. Maximum sustained winds 45 kt gusts 55 kt. Sebastien will turn northward later today and move away from the area. Fresh NE winds will prevail across most of the western Caribbean through Fri morning, with the strongest winds expected through the Windward and Mona passages Thu night as high pressure builds north of the region. ...SW N ATLANTIC INCLUDING THE BAHAMAS... Tropical Storm Sebastien is centered near 21.1N 61.7W 1002 mb at 10 AM EST moving W at 6 kt. Maximum sustained winds 45 kt gusts 55 kt. Sebastien will turn northward later today and move to 22.0N 61.7W this evening, 23.7N 60.2W Thu morning, 26.3N 57.2W Thu evening, then become extratropical as it merges with a cold front near 29.8N 52.5W Fri morning. Elsewhere, a cold front extending from 31N67W to 26N73W to 23N81W will continue moving southeastward across the region through Thu. High pressure will build across the northern waters Thu through Sat, then shift eastward Sat night through Sun as the next cold front moves off the SE U.S. coast. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... .AMZ127...ATLANTIC FROM 19N TO 22N BETWEEN 55W AND 65W... Tropical Storm Warning today into tonight. $$ *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 Reinhart. National Hurricane Center.