249 AGXX40 KNHC 191844 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 244 PM EDT Sun Aug 19 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... A surface trough will develop along the western Yucatan Peninsula during the evenings hours before pushing offshore into the SW Gulf each night. A surge of fresh to occasionally strong winds will accompany this trough. Otherwise, a ridge will dominate the Gulf waters producing a gentle to moderate anticyclonic flow, and seas generally in the 2 to 4 ft range, with the exception of 3 ft or less across the NE and SE parts of the Gulf. The ridge is forecasted to shift south and extend across the Gulf waters between 26N and 27N through Wed as a weak cold front reaches the northern Gulf. Model indicates that the front will stretch from the Florida Panhandle to SE Louisiana to the upper Texas coast on Wed morning. At this time, a weak high pressure cell will develop near 26N92W. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... Strong nocturnal easterly trades expected along the northwest coast of Colombia and Gulf of Venezuela through the middle of the week. The aerial extent of the fresh to strong trades is forecast to slightly increase across the central Caribbean by Tue, with seas building to 9 or 10 ft near the coast of Colombia. A tropical wave along 80W will continue westward across the western Caribbean today moving across the Yucatan Peninsula on Mon. A second tropical wave along 68W will continue through the central Caribbean through early Tue morning, and across the western Caribbean Tue and Wed. A third tropical wave in the central Atlantic will reach along 55W early on Tue, and reach the Lesser Antilles early on Wed. These tropical waves will have little impact in winds and seas. ...SW N ATLANTIC INCLUDING THE BAHAMAS... A ridge will dominate the forecast waters during the next several days. A broad surface trough extending from 25N69W to the SE Bahamas will drift westward over the next 24 hours while dissipating. Light to gentle winds are expected near the trough axis. A high pressure center of 1021 mb located near 31N68W will be just E of Bermuda by Mon morning, the move eastward on Tue and strengthen. Under this pattern, expect a gentle to moderate anticyclonic flow N of 23N, with moderate to fresh trades prevailing south of 23N, except becoming locally strong along the north coast of Hispaniola during the late afternoon into evening hours. Seas are forecast to build to 2-4 ft E of the Bahamas, and 1-2 ft W of the Bahamas, with the exception of 3-5 ft S of 23N, and 4-6 ft just N of Dominican Republic. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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 GR. National Hurricane Center.