000 AGXX40 KNHC 290741 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 341 AM EDT Tue May 29 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... Subtropical Depression Alberto was inland over the western Florida Panhandle near 31.4N 86.2W 996 mb at 11 PM EDT moving N at 10 kt. Maximum sustained winds 30 kt gusts 40 kt. Alberto will continue inland to 32.9N 86.7W Tue morning...become a remnant low and continue to move northward before dissipating late Fri. Scattered showers and thunderstorms persist in a line from roughly the northeast corner of the Yucatan Peninsula to just offshore of Tampa. In addition, scattered showers and thunderstorm are moving off the Louisiana coast, wrapping around the center of Alberto. The showers and thunderstorms will diminish over the north central Gulf as Alberto moves inland, but persist through mid week over the eastern Gulf, on the east side of a persistent and sharp mid to upper trough extending across the central Gulf. The mean southerly flow will diminish after mid week, stifling the deep layer moisture over the eastern Gulf and allowing the showers and thunderstorms to diminish. Ridging will build from the western Atlantic across the northern Gulf maintaining southerly flow and moderate seas. By late Thu, troughing will form each evening over the western Yucatan and drift over the southwest Gulf through Sat. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... A sharp mid/upper trough persists from the central Gulf through the western Caribbean. This is supporting clusters of showers and thunderstorms covering much of the Caribbean from San Andres Island to central Cuba. The upper trough is supporting weak low level troughing over the Yucatan Peninsula. A relatively tight pressure gradient between the low level troughing and the Atlantic ridge northeast of the region is maintaining fresh to locally strong southerly flow over portions of the northwest Caribbean south of Cuba. Strong gusts are possible with these showers and thunderstorm as they stream northward into central Cuba, where widespread flooding has been reported. These winds will gradually diminish through late in the week as the mid/upper trough shift westward and becomes more broad. Meanwhile, ridging north of the basin is supporting fresh to strong trade winds over the south central Caribbean with seas to 8 ft. Little change is expected. Fresh to strong winds are possible in the Gulf of Honduras by late Wed as the Atlantic ridge builds westward as the mid/upper trough shift west. ...SW N ATLANTIC INCLUDING THE BAHAMAS... Moderate to fresh southerly flow and scattered showers are still noted across the region between the Atlantic ridge centered along roughly 28N, and the remnant low of Subtropical Storm Alberto now moving northward through Alabama. Seas are 5 to 7 ft in open waters. The winds and convection will diminish early this morning as Alberto continues northward. A weak high pressure center will develop along the ridge northwest of the northern Bahamas by mid week as a cold front moves into the waters north of 26N and east of 70W through Thu, before stalling and dissipating along 25N Fri. This pattern will support pulses of mainly overnight fresh to strong easterly winds off the northern coast of Hispaniola through at least mid week. The high pres center will dissipate and the ridge will shift south Sat ahead of a trough moving through the Carolinas. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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.