000 AGXX40 KNHC 050727 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 327 AM EDT Wed Jul 5 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, with axis across the northern Gulf, will continue to dominate the area through Sunday. This will result in gentle to moderate E to SE winds and seas of 4 ft or less across much of the Gulf. Light to gentle winds and seas of 2 ft or less are noted over the NE Gulf due to the presence of a 1019 mb high pressure along the ridge axis. Gentle to moderate easterly winds and seas of 2-4 ft are expected across the Straits of Florida through Friday under the influence of this ridge. Meanwhile a thermal trough will develop during the evening hours over the Yucatan Peninsula before pushing offshore into the SW Gulf each night. A surge of fresh N-NE winds will accompany this trough. Seas will briefly build to 5 ft in association with these winds. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... A ridge north of area will support fresh to strong winds across the south-central Caribbean through Sat, with seas building up to 11 ft on Thursday. A tropical wave is moving across the NW Caribbean and northern Central America, with axis along 84W. Scattered moderate to isolated strong convection is noted within about 120 nm E of the wave axis north of 15N. This wave will reach the Yucatan Peninsula late today. Moderate to fresh easterly winds and seas to 8 ft, based on an altimeter pass, are noted in the wake of the wave. Another tropical wave extends from Puerto Rico to the coast of Venezuela near 10.5N67W. Satellite imagery continues to show a disctinct leading edge of clouds and showers racing ahead of the wave axis. This wave will move across the central Caribbean through late Thursday. Scatterometer and surface data show very well the wind shift associated with the wave axis. Fresh winds and seas of 5-6 ft will accompany the wave. Winds and seas will increase Friday and Saturday northeast of the Lesser Antilles as a tropical disturbance approaches from the east. Currently, a 1009 mb surface low is centered near 10N35W. Environmental conditions remain favorable for a tropical cyclone to form within the next day or two while the low moves westward or west-northwestward at 10 to 15 kt across the tropical Atlantic. After that time, the system is expected to encounter a drier and more stable air mass, which should be less favorable for development. ..SW N ATLANTIC INCLUDING THE BAHAMAS... A ridge along 31N will support gentle to moderate breezes N of 25N and moderate to fresh trade winds S of 25N. Periods of strong winds can also be expected each evening along the northern coast of Hispaniola. Looking ahead, winds and seas will increase Friday and Saturday NE of the Leeward Islands ahead of a tropical low currently near 10N35W. Please, refer to the section above for more details. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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.