000 AGXX40 KNHC 070747 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 347 AM EDT Fri Jul 7 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... A ridge of high pressure extends along the northern Gulf Coast from the Florida Big Bend to the Upper Texas Coast. Latest satellite-derived winds and seas along with ship, buoy, and CMAN data depict light to gentle winds prevailing over the northern half of the Gulf, while moderate to fresh winds are evident over the southern half. Seas remain in the 1-2 ft range over the NE Gulf, 3-4 ft over the SW Gulf, and 2-3 ft over the remaining Gulf waters. The ridge will linger along the northern Gulf Coast through early next week. A thermal trough will continue developing during the evening hours over the Yucatan Peninsula before pushing offshore into the SW Gulf each night. A surge of moderate to fresh N-NE winds will accompany this trough, with seas briefly building to 5 ft over the Bay of Campeche in association with these winds. Otherwise, gentle to moderate E to SE winds and seas of 4 ft or less will prevail over most of the Gulf through Sun. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... A ridge of high pressure prevails north of the area in the vicinity of 29N. Latest satellite-derived winds and seas along with ship, buoy, and CMAN data continue to show fresh to strong winds over the central Caribbean, moderate to locally fresh winds over the eastern and western Caribbean, and gentle to moderate trades over the tropical north Atlantic forecast zones. Seas range between 8 and 10 ft over the central Caribbean, 4-6 ft over the eastern Caribbean, 3-5 ft over the western Caribbean, and 5-7 ft over the tropical north Atlantic forecast zones. These general conditions will continue over the Caribbean waters through Saturday. Tropical Depression Four is expected to weaken into remnants and pass northeast of the Lesser Antilles this weekend, then north of Puerto Rico early next week. This will weaken the ridge to the north and reduce the pressure gradient over the Caribbean waters, causing a decrease in winds and seas on Sunday and Monday. ..SW N ATLANTIC INCLUDING THE BAHAMAS... A ridge of high pressure prevails over the northern waters along 29N. Latest satellite-derived winds and seas along with ship, buoy, and CMAN data depict light to gentle winds over the waters north of 25N. Gentle to moderate winds are evident over the waters south of 25N. Seas are in the 2-3 ft range over the northern waters, 4-5 ft over the southern waters outside the Bahamas, and 1-3 ft west of the Bahamas. The ridge will prevail over the northern waters through the forecast period. Tropical Depression Four, or its remnants, will pass northeast of the Lesser Antilles on Sunday, and north of Puerto Rico on Monday. This system will weaken the ridge slightly as it heads WNW through the Bahamas on Tuesday and Wednesday. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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.