000 AGXX40 KNHC 210758 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 358 AM EDT Wed Jun 21 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 storm Cindy is located near 26.8N 91.4W or about 170 nm southeast of Galveston and 280 nm south of Morgan City Louisiana moving to the Northwest or 310 degrees at 6 kt, with maximum sustained winds of 50 kt gusts to 60 kt. The 03Z NHC forecast has Cindy weakening slightly as it approaches 28.1N 93.0W early this evening, and continuing to weaken as it moves to near 29.8N 93.8W around daybreak Thursday. Cindy is then forecast to move inland to near 31.4N 93.8W by Thursday evening. Since Cindy is a sprawled out system that is moving slowly, seas of 12 ft and greater will span a large distance over the northern and central Gulf waters through Thursday, at which time they are forecast to subside to less than 12 ft. Satellite imagery shows that a large surface trough positioned to the east through southeast of Cindy is continuing to activate clusters of scattered showers and thunderstorms over much of the central and eastern Gulf waters. Although latest imagery shows this activity diminishing some, it is likely to increase later this morning. The trough is forecast to persist through into Thursday. Once Cindy moves inland, Atlantic high pressure will ridge westward across the northern Gulf waters through Sunday, and will be the feature that controls the wind regime and throughout. A thermal trough will move off the Yucatan peninsula in the evenings and across the SW Gulf through the mornings beginning on Thursday. It will be followed by fresh to strong east to southeast winds Thursday, but mainly fresh winds thereafter. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... The remnants of former Tropical Storm Bret are analyzed as a tropical wave near 73W moving westward at 13 kt. The wave is moving through an area of the Caribbean where the gradient remains rather tight between Atlantic high pressure and broad low pressure located over northern South America and the SW Caribbean Sea. The resultant east trades are within the range of strong to near gale force south of 16N between 67W and 76W with seas of 10-15 ft. Strong southeast to south winds are over the far northwest Caribbean north of 20N between the western tip of Cuba and the Yucatan peninsula, while generally fresh to strong trades are elsewhere across the basin, and moderate to fresh northeast to east winds are over the tropical north Atlantic zones. Seas elsewhere are in the range of 7-9 ft, except 5-8 ft over the northwest Caribbean, and lower seas of 4-6 ft over the remainder of the Caribbean. Seas of 6-7 ft are the tropical north Atlantic, except for higher seas of 7-9 ft in east swell from 12N to 19N west of 58W. The 7-9 ft seas will subside today. The tropical wave will move across the rest of the central Caribbean through tonight and across the eastern part of the western Caribbean Thursday and Thursday evening while dampening out. A tight gradient will follow in behind the wave before weakening on Thursday. The aforementioned area of the large seas in the range of 10-15 ft will shift westward through tonight as well while slowly subsiding to 12 ft, then to 9-10 ft from 14N to 17N and between 73W and 78W by early on Thursday, to 8 ft by late Thursday afternoon and to less than 8 ft by early on Friday. The next tropical wave is forecast to approach the Lesser Antilles on Thursday evening, and move across the eastern Caribbean Friday and Friday night and the central Caribbean Saturday through Sunday. A stronger tropical wave is forecast to quickly move through the tropical north Atlantic on Saturday, and the eastern Caribbean on Sunday followed by increasing winds and attendant by scattered showers and thunderstorms. ...SW N ATLANTIC INCLUDING THE BAHAMAS... High pressure will remain the main feature to dominate the weather pattern across the basin through the forecast period. Latest satellite derived winds and seas along with ship, buoy, and CMAN data depict moderate to fresh winds over the southern waters with light to gentle winds over the northern waters. Outside the Bahamas, seas are in the 5-7 ft range over the southern waters and 3-4 ft over the northern waters, and water west of the Bahamas. High pressure will continue to prevail over the forecast waters through the period. Fresh to locally strong winds will continue over the far southern waters through the next few days, with the locally strong winds mainly confined between the SE Bahamas and Hispaniola. These winds will occur mostly in a pulsing fashion in the evenings and at night. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... .GMZ011...NW GULF INCLUDING STETSON BANK... Tropical Storm Warning into tonight. .GMZ013...N CENTRAL GULF INCLUDING FLOWER GARDEN BANKS MARINE SANCTUARY... Tropical Storm Warning early into tonight. .GMZ019...CENTRAL GULF FROM 22N TO 26N BETWEEN 87W AND 94W... Tropical Storm Warning early today. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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 Aguirre. National Hurricane Center.