000 AGXX40 KNHC 131718 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 118 PM EDT Tue Apr 13 2021 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... A weak high pressure ridge over the eastern Gulf will shift eastward through Wed ahead of an approaching cold front. This front will cross the northern Gulf late Wed night through Thu night, then stall and weaken Fri and Fri night. A stronger cold front may move into the NW Gulf late Fri night and Sat, with strengthening NE winds and building seas following its passage. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... An Ashfall Advisory is in effect for La Soufriere Volcano on the island of St. Vincent near 13.3N 61.2W. Mariners transiting the Tropical N Atlantic waters south of 15N should exercise caution and be aware of the possibility of encountering volcanic ash. Otherwise, moderate to fresh SE winds will continue over the far NW Caribbean through the period, except for pulsing strong winds in the Gulf of Honduras. Elsewhere, generally moderate to fresh trade winds will persist through this week. ...SW N ATLANTIC INCLUDING THE BAHAMAS... A cold front that extends through 26N65W to central Cuba will move eastward and pass east of the forecast waters on Wed. A secondary cold front or low pressure trough will cross the northern waters later today through early Wed, with strong winds and building seas expected N of 27N and E of 75W. Yet another cold front will move off the southeastern U.S. coast later this week and over the northern offshore waters Thu night and Fri, then stall north of the Bahamas this weekend. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... .AMZ035...OFFSHORE WATERS WINDWARD ISLANDS INCLUDING TRINIDAD AND TOBAGO... Ashfall Advisory today into Wed night. .AMZ037...TROPICAL N ATLANTIC FROM 07N TO 15N BETWEEN 55W AND 65W... Ashfall Advisory today into Wed night. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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 B Reinhart. National Hurricane Center.