000 AGXX40 KNHC 011755 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 155 PM EDT Tue Aug 1 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 surface trough extends westward from central Florida to the Texas coast, with an area of active convection evident along the boundary, centered near 26N88W. Scatterometer data shows weak low level wind convergence across the central Gulf, and sea heights remain 2-4 ft across the basin. The ridge axis will begin to drift northward tonight, and model guidance shows a broad ridge of high pressure building across the region later in the week. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... A tropical wave along 77W south of Jamaica will move across the remainder of the western Caribbean through Wed night. Another tropical wave in western Atlantic along 52W will reach the Lesser Antilles Wed, then move across the Caribbean Wed night through early Sat. Fresh trade winds and building seas associated with the wave will spread across the tropical Atlantic between 13N and 20N tonight. Seas will build to 8 to 9 ft in the tropical Atlantic waters overnight, with 8 ft seas expected in Atlantic passages. Strong winds will then push into the Windward Passage by Wed night behind the wave axis. Persistent high pressure north of the region will support fresh trade winds over most of the central Caribbean the next several days. Winds will also pulse to near 25 kt in the Gulf of Honduras Thu through Sat as the ridge builds westward across the Gulf of Mexico. ...SW N ATLANTIC INCLUDING THE BAHAMAS... Tropical Depression Emily is located about 135 nm E of Saint Augustine, and moving NE away from northern Florida at 12 kt. Scatterometer data showed a broad area of 20-25 kt winds SE of the center, with highest winds near 30 kt displaced about 60 nm SE from the relatively light winds around the cyclone center. Max seas are estimated to be 8 to 10 ft. It is expected to move N of the area Wed morning. Scattered moderate to heavy showers and some embedded thunderstorms will continue east and southeast of the low through Wednesday. A tropical wave moving through the Lesser Antilles into the central Caribbean Wed through Fri will freshen trade winds in southern waters the next few days. Fresh to strong winds will pulse off Hispaniola and approaches to the Windward Passage through Fri, with strongest winds occurring during the afternoon and evening with seas reaching 8 ft. Winds and seas will diminish this weekend as weak high pressure builds over the region. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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 Mundell. National Hurricane Center.