000 AGXX40 KNHC 170824 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 424 AM EDT Mon Jul 17 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... The northern portion of a tropical wave is moving across the Bay of Campeche enhancing isolated showers and thunderstorms. Latest satellite derived winds and seas along with ship, buoy, and CMAN data depict light to gentle mostly southerly winds and seas in the 1-2 ft range prevailing across the forecast waters. A surface high is building in across the forecast waters. A trough will develop across the Yucatan peninsula each late afternoon into the early evening hours. The trough will move W-NW during the overnight hours, and dissipate across the SW Gulf by late each morning. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... Latest satellite derived winds and seas along with ship, buoy, and CMAN data depict moderate to fresh winds across the central Caribbean, while light to moderate winds prevail across the eastern and western Caribbean. Moderate to fresh winds prevail across the tropical north Atlantic forecast zones. Seas are in the 4-6 ft range across the central Caribbean, 4-5 ft across the eastern Caribbean, 1-3 ft across the western Caribbean, and 5-7 ft across the tropical north Atlantic forecast zones. High pressure will build across the Atlantic waters north of the area early in the week and maintain itself through much of the week ahead. This will tighten the pressure gradient and increase winds and seas across the forecast area. A tropical wave currently along 54W will begin impacting the eastern-most zones by tonight and move across the Lesser Antilles on Tuesday night increasing winds to fresh to occasional strong levels through early Wednesday morning. This wave will interact with a low that is developing to the east of it, which has a medium potential for tropical development during the next 48 hours. Seas east of the islands will reach 7-9 to ft as the wave/low passes through the region. As the wave/low begins to track across the eastern Caribbean waters on Wednesday...winds will remain fresh to strong in the vicinity of the wave axis with seas building west of the Lesser Antilles as a result into a range of 7 to 9 ft. The system will begin impacting the central Caribbean late Wednesday night into Thursday. ..SW N ATLANTIC INCLUDING THE BAHAMAS... Latest satellite derived winds and seas along with ship, buoy, and CMAN data depict light to gentle winds across the northern waters with gentle to moderate winds across the southern waters. Seas are in the 3-4 ft range across the northern waters, 4-5 ft across the southern waters outside the Bahamas, and 1-2 ft west of the Bahamas. High pressure will build across the forecast waters by early this week and prevail thereafter. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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 ERA. National Hurricane Center.