000 AGXX40 KNHC 300751 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 351 AM EDT Mon Apr 30 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... High pressure centered near the mouth of the Mississippi extends a ridge SE to the Straits of Florida. The high pressure will track northeastward and inland today, then move east off the Georgia coast Mon evening with the ridge extending W-SW across the N gulf waters through Thu. A weak surface trough will move W off SW Florida tonight and across the eastern gulf Mon, followed by moderate to locally fresh E to SE winds through Tue as it becomes diffuse over the north- central gulf. Fresh to strong NE to E winds will develop over the far SE gulf and Straits of Florida beginning Tue, and continue through early Thu as strong high pressure builds southeastward over the western Atlantic. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... Strong high pressure remains centered over the N central Atlc, while a weakening old frontal boundary extends from just W of Cayman Islands NE across central Cuba. This pattern to maintain fresh trades across the entire area south of 17N, with locally strong trades across the south-central Caribbean through early Thu. The southern portion of a broad inverted trough will move into the eastern Caribbean Thu, and pass south of Hispaniola on Fri, followed by fresh to locally strong E to SE winds, and active weather. Have closely followed EC/UKMET for Day 4 and beyond in association with trough. ...SW N ATLANTIC INCLUDING THE BAHAMAS... A weakening front has become nearly stationary from 31N67W SW to central Cuba near 21N78W. southwest to to 27N73W and becomes a weakening stationary front to central Cuba. The cold front will move slowly SE Mon and reach from just E of Bermuda to W central Cuba by early Mon afternoon. A new cold front across the NW waters from 31N76W to near Melbourne Florida will move quickly SE tonight and Mon before it merges with preceding front Mon night from near 28N65W to west-central Cuba. Mon night. It will then become stationary from near 27N65W to west- central Cuba by early Wed. Strong high pressure will slide eastward near 31N Mon night through early Thu, resulting in a tight pressure gradient N of the front that will bring fresh to strong NE to E winds to much of the central and SW waters. The high should weaken enough on Fri to allow for these winds to diminish. A broad surface trough will approach 65W Thu and 70W Fri. It is expected to be followed by fresh to locally strong E to SE winds, and active weather. Have closely followed EC/UKMET for Day 4 and beyond in association with trough. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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 Stripling. National Hurricane Center.