000 AGXX40 KNHC 181831 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 131 PM EST Tue Dec 18 2018 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 developing intense low pressure system will move E-NE from Texas to the Carolinas Wed through Thu night, dragging a strong cold front across the Gulf waters. Marine conditions are expected to rapidly deteriorate across the region Thu afternoon as the low deepens. Gale force winds are likely north of 25N across the central and northern Gulf early Thu night through Fri. Seas will build to a maximum around 20 ft on Fri over the central Gulf by Fri. High pressure will build over the region this weekend which will bring more tranquil marine conditions to the basin. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... A weakening stationary front extending from eastern Cuba to 16N86W will dissipate later today, then drift westward over the Yucatan peninsula tonight as a surface trough. Fresh to strong winds will continue across the south-central Caribbean through Sat, with the strongest winds near the coast of Colombia each night. A cold front associated with an intense low pressure system north of the area will enter the NW Caribbean Thu night. Strong return flow will develop Wed night into Thu ahead of the front. The cold front will reach from eastern Cuba to Nicaragua late Fri before stalling from Haiti to near the Nicaragua/Panama border Sat. Strong winds are expected to spread across the western Caribbean behind this front. ...SW N ATLANTIC INCLUDING THE BAHAMAS... A stationary front extends from 26N65W to eastern Cuba. Scattered moderate to isolated strong convection is within 90 nm east of the cold front mainly north of 28N. Scattered showers are elsewhere within 60 nm of the front. The western portion of the front will transition to a warm front and move northward Wed and Thu as an intense low pressure system develops over the southeast U.S.. Gale force winds are likely north of 27N east of Florida Thu night through Fri night both ahead and behind of a cold front associated with the low. Maximum seas will build to around 20 ft by Fri night west of 70W. Conditions will improve across the area on Sat as high pressure builds from the west. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... .GMZ011...NW GULF INCLUDING STETSON BANK... GALE CONDITIONS POSSIBLE Thu night. .GMZ013...N CENTRAL GULF INCLUDING FLOWER GARDEN BANKS MARINE SANCTUARY... GALE CONDITIONS POSSIBLE Thu night into Fri. .GMZ015...NE GULF N OF 25N E OF 87W... GALE CONDITIONS POSSIBLE Thu night into Fri. .GMZ019...CENTRAL GULF FROM 22N TO 26N BETWEEN 87W AND 94W... GALE CONDITIONS POSSIBLE Thu night. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... .AMZ111...ATLANTIC FROM 27N TO 31N W OF 77W... GALE CONDITIONS POSSIBLE Thu into Fri night. .AMZ113...ATLANTIC FROM 27N TO 31N BETWEEN 70W AND 77W... GALE CONDITIONS POSSIBLE Thu night into Fri night. $$ *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 Latto. National Hurricane Center.