000 AGXX40 KNHC 030716 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 316 AM EDT Mon Jul 3 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 this week. This will result in gentle to moderate winds across the Gulf waters, with light to gentle breezes across the NE Gulf where a weak high pressure center will prevail. Seas will remain generally below 5 ft throughout. Gentle to moderate easterly winds and seas of 2-4 ft are expected across the Straits of Florida through Friday under the influence of the 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 to occasionally strong winds will accompany this trough. Seas will briefly build to 6-7 ft in association with these winds. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... The most recent scatterometer pass provided observations of fresh to strong winds across the south-central Caribbean, with mainly fresh easterly winds across the remainder of the central Caribbean. Meanwhile, an altimeter pass showed seas up to 12 ft across the south-central Caribbean with the strongest winds. A tropical wave extends from the Mona Passage to Bonaire, in the ABC Islands, to the coast of Venezuela near 10.5N68W. This wave is generating some shower activity across the eastern Caribbean, and will move through the central Caribbean through mid week. As previously mentioned, winds have diminished to 20-25 kt across the central Caribbean ahead of this approaching tropical wave. Fresh to strong winds are expected behind the wave as it crosses the central Caribbean. Seas will subside to 8-9 ft through Thursday, and build again to 10-11 ft across the south-central Caribbean Thursday night into Friday. A cluster of moderate to strong convection is S of 11N E of 80W, including the approach to the Panama Canal. Winds and seas could be higher near thunderstorms. A second tropical wave is added to the 06Z analysis/surface map along 55W. This wave is currently generating some shower activity, and will move across the Windward Islands tonight, and across the eastern Caribbean through Tuesday night. Moderate to fresh winds and seas of 5-6 ft will accompany the wave passage. Looking ahead, winds and seas will start to increase by late Fri east of the Lesser Antilles ahead of a vigorous tropical wave and attendant surface low pressure area, currently in the tropical eastern Atlantic. Although shower and thunderstorm activity is currently disorganized in association with this broad area of low pressure, environmental conditions are expected to be conducive for some gradual development of this system later this week while it moves toward the west-northwestward at about 10 kt. ..SW N ATLANTIC INCLUDING THE BAHAMAS... A ridge extending along roughly 28N to 30N will maintain light to gentle winds and slight seas N of 25N, and moderate to fresh easterly winds and 3 to 5 ft in open waters S of 25N through mid week, with strong winds and seas of 6-7 ft pulsing off the north central coast of Hispaniola each evening. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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.