000 AGXX40 KNHC 280507 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 107 AM EDT Sun May 28 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 thermal trough will develop late each afternoon over the Yucatan Peninsula, and shift w across the southwestern gulf waters, generally to s of 24N between 90W and 93W, during the overnight and early daylight hours, and gradually lose identity along about 94W by late each morning. Expect a ne-e-se 15-20 kt wind shift along the trough axis, except 20 to 25 kt along the n coast of the Yucatan Peninsula this evening and on Mon evening, with guidance hinting that these brief strong conditions will not develop again till Fri evening. Expect seas to build briefly to 6 ft just w of the strong winds. A surface high will meander over the far ne gulf waters through Thu night with fresh moderate southerly return flow over the waters w of 88W, increasing to fresh breeze each evening, with 3 to 5 ft seas throughout the period. Light and variable winds will surround the high center, with light to moderate anticyclonic flow forecast e of 88W through Thu night, except becoming a fresh breeze across the Fl Straights during the evenings. Widespread fog observed over the nw gulf this morning will be carried in weather grids ahead of convection. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... Atlc high pressure will support fresh e trades, with 5-8 ft seas, across the central Caribbean through Tue morning, with strong nocturnal trades within about 90 nm of the nw coast of Colombia and across the Gulf of Venezuela. The pressure gradient will tighten on Tue, with strong e winds expanding n from the Colombian coast to along 15N between about 70W and 77W on Wed, and expanding further n and further w on Thu with seas building to 11 ft near 13N75W. Strong nocturnal e to se trades forecast across the Gulf of Honduras through Thu night. Tropical waves over the e Caribbean and over the tropical waters e of the Windwards, will continue westward accompanied by a moderate to fresh ne-e-se wind shift and only a slight enhancement of convection. ...SW N ATLANTIC INCLUDING THE BAHAMAS... A weakening cold front extending sw from 31N60W to the central Bahamas will dissipate today. A ridge will extend e to w along 27N later today where it will meander through Tue, then shift n to along 28N on Wed and along 29N on Thu. Moderate to fresh easterlies are expected s of 23N, except becoming a strong e breeze along the n coast of Hispaniola during the evenings beginning on Mon. Moderate sw flow forecast n of the ridge. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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 Nelson. National Hurricane Center.