000 AGXX40 KNHC 100508 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 108 AM EDT Thu Aug 10 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... Tropical Cyclone Franklin inland Mexico at sunrise will continue westward and weaken to a remnant low near 19.5N 102W this evening. Winds will diminish to 20 kt or less, and seas will subside to less than 8 ft across SW Gulf by sunset today. A surface ridge will meander westward from the Florida Big Bend across the northern gulf waters through Mon with a surface high developing along the ridge during the late afternoons as a N to S orientated thermal trough develops over interior Florida during peak heating. A thermal trough will develop over the Yucatan Peninsula during the evenings, move slowly westward during the overnight hours, and dissipate over the SW Gulf by late each morning. Expect a fresh to locally strong NE-E-SE wind shift, and 3-5 ft seas, along this trough. However, this evenings trough will be reinforced by the n extension of a tropical wave that will pass W across the Bay of Campeche. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... Fresh to locally strong nocturnal trades are expected along the N coasts of Colombia and Venezuela to include the Gulf of Venezuela, resulting in seas to 9 ft propagating W across the SW Caribbean between 11N and 14N. Strong E trades expected along the southern tip of Hispaniola this morning, and forecast to develop again on Mon. Locally strong trades are forecast across the Gulf of Honduras this evening. A fresh NE-E-SE wind shift and seas to 6 ft will accompany a tropical wave passing through the E Caribbean this morning. The wave will continue through the Central Caribbean on Fri, then slow somewhat as it continues through the W Caribbean during the upcoming weekend. Model guidance suggests that the pressure gradient will tighten on Mon night with fresh to locally strong trades developing across the entire Caribbean to the S of 18N on Tue. ...SW N ATLANTIC INCLUDING THE BAHAMAS... A series of troughs will pass E to W across the area through Mon. The westernmost trough will move W through the Bahama Channel today accompanied by SCT TS. Another trough will separate from its parent tropical wave that will continue W across the tropical waters S of 22N passing through the Virgin Islands this morning, reaching the Atlc approach to Mona Passage tonight, and pass through the Atlc approach to the Windward Passage on Fri night and Sat. The trough that breaks off to the N will move NW reaching the SE Bahamas on Fri night, and pass through the Central Bahamas this weekend, and pass through The Bahama Channel on Mon night into Tue, all the while accompanied by a moderate to locally fresh NE-E-SE wind shift. Strong trades will develop along the N coast of Hispaniola this evening and again on Sun and Mon evenings. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... .GMZ023...SW GULF S OF 22N W OF 94W... Hurricane Warning early today. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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.