755 AGXX40 KNHC 271744 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 144 PM EDT Fri Jul 27 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 subtropical ridge has an axis that extends SW across the Florida peninsula and into the E Gulf, supporting light to gentle variable winds basin-wide. A trough will move off the western Yucatan peninsula each night and cross the eastern Bay of Campeche the next several mornings with winds increasing to locally fresh near the trough axis. GOES-16 water vapor imagery shows very dry air over the Gulf, inhibiting convection. Under this regime, benign marine conditions will prevail across the basin through at least Sun. The only exception will be briefly gusty winds and increased seas in and around isolated thunderstorms mainly over the eastern Gulf. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... Shallow moisture in the NW Caribbean along with divergent flow aloft are supporting heavy showers and tstms within 180 nm S of the coast of W Cuba today. In the SW Caribbean, the EPAC monsoon trough continues to support scattered showers and tstms within 120 nm of the coast of NW Colombia, Panama and Costa Rica. Isolated showers are occurring in the northern Leeward Islands and the Virgin Islands, supported by diffluence aloft associated with an upper level low NE of Puerto Rico. A tropical wave is moving over the central basin void of convection. A new tropical wave is forecast to move across the Lesser Antilles tonight, and a third wave will enter the E Caribbean Sun night. Strong winds will pulse along the coast of NE Colombia and NW Venezuela each night through the period. Fresh trade winds will prevail elsewhere across the central Caribbean, with moderate to fresh winds over the eastern Caribbean, and gentle to moderate winds over the western Caribbean. ...SW N ATLANTIC INCLUDING THE BAHAMAS... Diffluent flow aloft between the base of an upper trough over the SE CONUS and a high over the northern Bahamas continues to support scattered showers and tstms N of 23N W of 70W. The upper- level trough will prevail through today, enhancing shower and thunderstorm activity over this area. Farther east, a mid-level low just N of Hispaniola supports a surface trough that extends from 20N68W to 26N67W along with scattered showers and isolated tstms from 21N to 27N between 65W and 70W. This feature will move slowly westward the next couple of days. Otherwise, high pressure over the west- central Atlantic will prevail across the region through Tue night. Fresh to occasionally strong trade winds are expected just N of Hispaniola through the weekend. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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 Latto. National Hurricane Center.