000 AGXX40 KNHC 101700 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 100 PM EDT Mon Jul 10 2017 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... High pressure prevails over the northern Gulf waters. Latest satellite derived winds and seas along with ship, buoy, and CMAN data depict light and variable winds over the northern Gulf, with gentle to moderate winds prevailing over the southern Gulf. Seas are in the 2-4 ft range over the southwest Gulf and 1-2 ft elsewhere. High pressure will prevail over the northern waters through the week. A thermal trough will develop each evening over the Yucatan Peninsula before pushing offshore into the SW Gulf each night, where it will dissipate each morning. A surge of moderate to fresh N-NE winds will accompany this trough, with seas briefly peaking at 5 ft by early morning in association with these winds. Otherwise, gentle to moderate E to SE winds and seas of 4 ft or less will continue over most of the Gulf through the forecast period. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... A weakening ridge of high pressure prevails north of the area. Latest satellite derived winds and seas along with ship, buoy, and CMAN data depict fresh to strong winds over the south central Caribbean and moderate to fresh winds over the north central Caribbean. Gentle to moderate winds prevail over the remainder of the Caribbean as well as the tropical north Atlantic forecast zones. Seas are in the 6-9 ft range over the south central Caribbean, 4-6 ft over the north central Caribbean, 3-5 ft over the eastern and western Caribbean, and 4-5 ft over the tropical north Atlantic forecast zones. The ridge to the north of the area will weaken further and shift northward as a surface trough moves westward across the SW N Atlantic waters. This will reduce the pressure gradient over the Caribbean and decrease winds and seas during the second half of the week. ..SW N ATLANTIC INCLUDING THE BAHAMAS... High pressure has started to weaken as a surface trough has shifted into the eastern waters. Latest satellite derived winds and seas along with ship, buoy, and CMAN data depict light to gentle to moderate winds prevail over the forecast waters. Seas are in the 3-6 ft range over the northern waters, 5-7 ft over the southern waters outside the Bahamas, and 1-3 ft west of the Bahamas. The surface trough will move westward across the southern forecast waters through midweek. High pressure will build in the wake of the trough. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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 AL. National Hurricane Center.