512 AGXX40 KNHC 281824 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 224 PM EDT Sat Jul 28 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... The Atlantic high pressure extends a ridge southwestward across the Florida peninsula into the eastern part of the Gulf. The associated gradient is allowing for light to gentle anticyclonic winds to exist throughout. The buoy observations along with recent satellite-derived waveheights data reveal seas in the 1-3 ft over the entire basin. A thermal trough will continue to emerge off the western Yucatan Peninsula each night and move across the eastern Bay of Campeche during the forecast period, with associated winds increasing to locally fresh near the trough. Seas will build a little higher over the eastern Bay of Campeche, to the range of 3-4 ft, beginning Mon night. A ridge will continue to dominate the Gulf region with little change in the weather pattern through the middle part of next week. A cold front will approach the far northwestern Gulf Tue, and move across those waters Wed. Model guidance indicates the front will be driven by yet another rather strong deep-layer trough for this time of year that will swing east-southeast from the Great Plains to the southeastern United States at that time. Expect scattered showers and thunderstorms, some with gusty winds and slightly higher seas, to increase over the northwestern section of the Gulf Tue through Wed night as the front moves across those waters. Isolated showers and thunderstorms may occur elsewhere over the Gulf through Wed. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... A tropical wave along 84W is helping to induce convection over the NW and SW parts of the Caribbean Sea. Winds and seas could be higher near the tstms S of 12N W of 80W, and near the northern end of the wave's axis. Another tropical wave has entered the basin and now is along 64W. This wave will move across the eastern Caribbean through Sun evening, then across the central Caribbean through the middle part of the upcoming week. Strong northeast to east winds will pulse along the coast of NW Colombia and NW Venezuela each night through Tue night, then mainly fresh winds with locally strong winds on Wed. Fresh trade winds will prevail elsewhere across the central Caribbean, with moderate to fresh east winds over the eastern Caribbean, and gentle to moderate east-southeast winds over the western Caribbean. East winds will pulse to strong intensity over the Gulf of Honduras at night starting Sun night. ...SW N ATLANTIC INCLUDING THE BAHAMAS... Convection continues to flare-up across the waters just E of Florida to about 77W. A diffluent pattern aloft is helping to induce this convective activity. Farther east, an upper- level low just to the northwest of the Dominican Republic supports scattered showers and isolated thunderstorms from 23N- 26N between 65W- 70W. Otherwise, high pressure over the west-central Atlantic extends a ridge across the forecast waters. The ridge will remain in place through the forecast period. Fresh to occasionally strong trade winds are expected just N of Hispaniola through Wed. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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.