000 AGXX40 KNHC 310658 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 258 AM EDT Thu May 31 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 sharp upper trough persists from the western Florida Panhandle to the Yucatan Peninsula. This is supporting a few showers and thunderstorms over the loop current in the south central Gulf, and a few showers in the Straits of Florida. Otherwise little to no convection is active. A weak ridge extends across the northern Gulf, maintaining light breezes over the northeast Gulf, gentle to moderate E to SE flow elsewhere, except for 15 to 20 kt winds off the northern and western coast of the Yucatan Peninsula where the standard evening and overnight trough has formed. This surface trough will drift westward through the overnight hours then dissipate. Buoy observations show seas around 2 to 4 ft. Little change is expected for the next several days, with the trough over the Yucatan peninsula forming each evening. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... A recent scatterometer pass confirmed fresh to strong E to SE winds off the coast of Honduras. These winds are the result of a tight gradient between high pressure over the western Atlantic and a trough over Yucatan and northern Central America. The Atlantic ridge is also supporting fresh to strong trade winds off the coast of Colombia, where a recent altimeter pass showed seas to 9 ft. Moderate to fresh E to SE winds persist elsewhere across the basin. An upper trough reaching from the central Atlantic to the south central Caribbean is keeping skies mostly clear across from the tropical north Atlantic west of 55W through the central Caribbean, except for scattered showers and thunderstorm off the coast of Guyana ahead of an approaching tropical wave. The tropical wave will move across the eastern and central Caribbean through Sat with little impact on sensible weather. Little change is expected in the forecast. High pressure in the central Atlantic will maintain fresh to strong trade winds over the S central Caribbean with mainly moderate to fresh trades elsewhere the next several days. One exception is strong E to SE winds over the Gulf of Honduras expected now through Fri between the high pressure and troughing west of the area. ...SW N ATLANTIC INCLUDING THE BAHAMAS... 1020 mb high pressure is centered near 28N70W. A weak cold front is moving south of 31N east of the high pressure, and will stall east of the area along roughly 28N through late Fri before dissipating Sat. The high pres center will dissipate and the ridge will shift south Sat ahead of a trough moving through the Carolinas and into the western Atlc through Sun. Expect moderate to fresh SW flow starting Sat north of 28N with diminishing E to SE winds farther south. Seas will remain 3 to 5 ft. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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 Christensen. National Hurricane Center.