253 AGXX40 KNHC 301838 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 238 PM EDT Mon Jul 30 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 weak surface ridge extends into the eastern Gulf from the western Atlantic. With a very flat pressure gradient, winds are only 5- 10 kt across the entire Gulf. An upper level low is centered near 27N88W, which is helping to promote isolated moderate convection in the eastern and northern Gulf of Mexico. Winds will remain light during the next couple of days. Substantial moisture and upper-level trough forcing should contribute toward scattered moderate to strong deep convection over the Gulf during the next two days. Weak high pressure will prevail across the area through Fri. A cold front will approach the NW gulf waters Tue, and move across those waters Wed. The front will stall out late Wed then push eastward over the northern gulf waters as a weakening trough on Thu. Scattered showers and thunderstorms, with possible brief gusty winds and slightly higher seas are expected along and near the front and trough. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... Two tropical waves are moving across the Caribbean. Scattered moderate convection exists from 19N-23N between 84W- 90W. In the southwest Caribbean, the NE Pacific's monsoon trough supports numerous moderate and scattered deep convection from 07N-12N between 77W-85W over the SW Caribbean, Panama, and Costa Rica, and is expected to continue during the next couple of days. The Bermuda high northeast of the Caribbean in combination with low pressure over Panama/Costa Rica associated with the NE Pacific monsoon trough are contributing toward a moderate pressure gradient over the Caribbean. Strong to near gale-force northeast to east trades will pulse along the coast of Colombia N of 11N and along the NW Venezuela coast tonight and again Tue night. Strong winds will pulse over the Gulf Honduras each night Mon through Wed night. Elsewhere, fresh trade winds will prevail 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... Scattered moderate convection is observed over the W Atlantic N of 24N W of 77W. The strong central Atlantic high pressure extending to central Florida will lift just north of the area by Thu. Fresh to occasionally strong trade winds are expected just N of Hispaniola through Fri. Scattered showers and thunderstorms can be expected over much of the western portion of the area 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 Latto. National Hurricane Center.