000 AGXX40 KNHC 111830 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 230 PM EDT Fri May 11 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 weak surface ridge anchored by a high in south Alabama and a second center of high pressure NE of Great Abaco will support light to moderate return flow through Sat afternoon with 2 to 4 ft seas in the western half of the basin and 4 to 5 ft east of 90W. Fresh to strong winds are forecast to develop afterwards in the NE Gulf associated with a surface trough. A second surface trough will move off south Florida into the SE Gulf on Sun and is forecast to evolve into a center of low pressure that will support fresh to strong winds in the NE Gulf through Mon evening. The low will migrate north-northwest and enter the area of Pensacola early on Wed. Diffluent flow east of a middle level low centered near 25N95W is currently supporting scattered showers and tstms in the SE basin and isolated showers in the Yucatan Peninsula and adjacent waters. Showers in this region will continue through the weekend being enhanced by the two aforementioned troughs of low pressure. The center of low pressure that will develop will migrate this convection to the Yucatan Channel and the NE basin by early next week. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... Showers and tstms associated with an active east Pacific monsoon trough are expected in the SW Caribbean during the entire forecast period. Ridging extending from a strong center of high pressure in the north-central Atlc will support fresh to strong trades in the south-central basin at night and early morning hours. Near gale force winds are possible along the coast of Colombia during the weekend. Except the aforementioned area, seas in the SW and central Caribbean will build to 7 ft. Moderate to fresh trades will dominate elsewhere. ...SW N ATLANTIC INCLUDING THE BAHAMAS... The tail of a stationary front continue to dissipate along 30N71W across the central Bahamas near 25N76W to north-central Cuba near 22N78W. Scattered showers and isolated tstms are occurring within 210 nm east of the front...including the Great Bahama Bank. The remnants of this front will become a trough tonight. The surface trough will then move west to inland Florida on Sat night. Scattered showers and tstms are expected over the weekend and early next week in the northern and central Bahamas, South Florida and the Florida Straits associated with this trough of low pressure. Surface ridging extending from the central Atlc will get establish Sun and prevail through the middle of the week, thus supporting moderate SE winds in the central and northern Bahamas and fresh SE winds in the southern Bahamas. Fresh to strong winds are expected at night in the Atlantic passages, including the Windward Passage. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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 Ramos. National Hurricane Center.