000 AGXX40 KNHC 171824 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 224 PM EDT Thu Aug 17 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 ridge extends across the northern Gulf from a 1019 mb high centered in the northeast Gulf near 28N87W to the coast of Texas. Offshore platforms and buoys indicated moderate to fresh winds in the northwest Gulf between the ridge and lower pressure in north central Mexico. The northern part of a tropical wave is moving across the western Yucatan Channel and adjacent Gulf waters, and will move through the Yucatan peninsula by early Fri, and across the southwest Gulf through Sat. This will enhance the normal evening thermal trough that develops over western Yucatan and moves into the southwest Gulf overnight through Sun, supporting fresh winds off the west coast of Yucatan each evening. Little change is expected through early next week. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... A tropical wave reaches from E Hispaniola to NW Venezuela, bringing scattered showers and thunderstorms to the Virgin Islands and Puerto Rico. Strong northeast winds have been noted on a scatterometer pass through the Mona Passage ahead of the tropical wave. The tropical wave will pass through the western Caribbean by Sun. This will be ahead of an area of low pressure that currently is to the east of 55W. This low center is expected to develop more, possibly into a tropical cyclone and move into the eastern Caribbean by Sat. The low is expected to deepen as it tracks WNW through the far northwest Caribbean through Mon night. Interests in the Caribbean should monitor carefully the latest Tropical Weather Outlook at hurricanes.gov for more information on this developing low pressure center. ...SW N ATLANTIC INCLUDING THE BAHAMAS... The northern part of a tropical wave moving, that is moving across E Hispaniola, will pass westward to the south of 22N through early Sat. The tropical wave is in phase with an upper low, resulting in enhanced convection over a broad area south of 25N between 62W and 72W, which generally will shift westward with the coupled tropical wave and upper low through the southern Bahamas and Turks/Caicos Islands. A second feature...an area of low pressure well to the southeast in the tropical Atlantic is moving WNW toward the region. Some potential exists for this low to develop into a tropical cyclone during the next couple of days as it approaches the area. Strong upper level winds may weaken it before it crosses 65W north of Puerto Rico by early Sun. This still will bring strong winds and building seas to the area south of 25N from Sun through mid week. A ridge along roughly 28N will move little through Sun then shift slowly northward early next week, maintaining light to gentle breezes into early next week north of 28N, with short period southeast swell of 4 to 6 ft. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... .AMZ033...CARIBBEAN S OF 15N BETWEEN 64W AND 72W INCLUDING VENEZUELA BASIN... Tropical Storm Warning Fri night into Sat. .AMZ035...OFFSHORE WATERS WINDWARD ISLANDS INCLUDING TRINIDAD AND TOBAGO... Tropical Storm Warning Fri into Fri night. .AMZ037...TROPICAL N ATLANTIC FROM 07N TO 15N BETWEEN 55W AND 65W... Tropical Storm Warning tonight into Fri. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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 MT. National Hurricane Center.