000 AGXX40 KNHC 011901 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 301 PM EDT Sun Jul 1 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 low pressure trough will support showers and thunderstorms over the NE Gulf through Tue as it slowly moves westward. Presently, satellite imagery and mosaic radar data indicate numerous showers and scattered thunderstorms confined to north of 27N and between 85W-90W. This activity is being further enhanced by an upper level-low over the Florida panhandle. The activity is expected to slowly translate westward through late Tue while diminishing. A high pressure ridge covering the remainder of the Gulf will change little through Thu night. A surface trough will emerge off the Yucatan Peninsula each evening through Thu, and act to enhance nocturnal winds over the eastern Bay of Campeche. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... A tropical wave near 85W will move inland central America tonight, and should help to enhance convective activity over much of the region through Mon. Another tropical wave. this one exhibiting a rather broad inverted-V shape signature on satellite visible imagery, is analyzed along a position from near 19N62W to inland S America at 10N68W, moving westward at 15 kt. Scattered showers and thunderstorms are noted both east and west of this wave to the south of 13N. The wave will move over the remainder of the eastern Caribbean through Mon evening, the central Caribbean Tue and Tue night and the western Caribbean Wed through early Thu, at which time it is expected to be near or just crossing the coast of central America and the Yucatan Peninsula. Fresh to strong winds over the central Caribbean will gradually diminish through Tue before restrengthening Wed through most of Fri. ...SW N ATLANTIC INCLUDING THE BAHAMAS... A high pressure ridge extending west-southwestward across the western Atlantic will weaken through Tue in response to the development of broad low pressure NE of the Bahamas, then rebuild Wed through Thu night. The low will weaken into a trough and move westward over the NW Bahamas Tue and over Florida Wed night. Scattered showers and thunderstorms are expected to accompany the low and trough. East to southeast winds will pulse to fresh to strong intensity between the Bahamas and the north coast of Hispaniola during the afternoons and into the following mornings beginning on Wed as new high pressure ridging associated with a strong high center northeast of the forecast waters builds southwestward from the north-central Atlantic towards the southeastern Bahamas and Hispaniola. The strong high center and its associated ridge is forecast to weaken some Thu through Fri as a low pressure system forms near Bermuda and tracks in a west- southwest motion between 30N-31N through early on Fri, then turns to the N near 70W later on Fri. The gradient between the low and the central Atlantic high pressure to its northeast and east will tighten on Fri likely leading to increasing southeast to south winds over mainly the eastern and central sections of zone AMZ115 along with seas of 5-7 ft. These conditions are susceptible to change pending the exact intensity the low acquires. Otherwise, generally tranquil marine conditions are expected across the region through Fri night. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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 Aguirre. National Hurricane Center.