000 AGXX40 KNHC 090706 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 306 AM EDT Sun Jul 9 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 while a tropical wave entering Mexico from the far southwestern Gulf is generating numerous moderate and scattered strong convection over the Bay of Campeche S of 21N. Light and variable winds prevail over the northern waters while gentle to moderate winds prevail over the southern waters. Seas are in the 2-4 ft range over the southwestern Gulf and 1-2 ft over the remaining Gulf waters. A high pressure ridge will linger over the northern waters through Tuesday, then lift north into the southeastern United States. A thermal trough will develop each evening over the Yucatan Peninsula before pushing offshore into the SW Gulf each night and dissipate over this area each morning. A surge of moderate to fresh N-NE winds will accompany this trough, with seas briefly peaking at 5 ft 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 ridge of high pressure prevails north of the area. A tropical wave, the remnants of Tropical Depression Four, is moving through the tropical north Atlantic waters and far eastern Caribbean. Latest satellite derived winds and seas along with ship, buoy, and CMAN data depict fresh to strong winds over the south central Caribbean, moderate to fresh winds over the north central Caribbean, gentle to moderate winds over the eastern and western Caribbean. Gentle to moderate winds prevail over much of the tropical north Atlantic forecast zones, except fresh to strong winds over the northern waters in association with the remnant wave of Tropical Depression Four. Numerous showers and scattered thunderstorms associated with the wave are occurring within 90 nm of 22N58W. Seas are in the 5-8 ft range over the central Caribbean, 3-5 ft over the eastern and western Caribbean, and 4-6 ft over much of the tropical north Atlantic forecast zones, except the northern waters where seas are in the 8-9 ft range associated with the fresh to strong winds associated to the remnant wave of Tropical Depression Four. The remnants of Tropical Depression Four will pass northeast of the Lesser Antilles today and tonight, then north of Puerto Rico on Monday and Monday night. This will weaken the ridge to the north and reduce the pressure gradient over the Caribbean waters, bringing a decrease in winds and seas in that basin by the middle of this week. ..SW N ATLANTIC INCLUDING THE BAHAMAS... High pressure prevails over the forecast waters. Latest satellite derived winds and seas along with ship, buoy, and CMAN data depict light to gentle winds over the waters north of 24N and gentle to moderate winds south of 24N. Moderate SW return flow is observed over the waters N of 28N and W of 78W. Seas are in the 3-4 ft range over the northern waters, 4-6 ft over the southern waters outside the Bahamas, and 1-3 ft west of the Bahamas. The ridge over the forecast waters will shift northward during the first half of this week as the remnants of Tropical Depression Four move into the eastern forecast zones, then across the forecast area. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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 McElroy. National Hurricane Center.