000 AGXX40 KNHC 301802 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 202 PM EDT Tue May 30 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 thermal trough will develop late each afternoon across the Yucatan Peninsula, and shift W across the SW gulf waters, generally to S of 24N between 90W and 94W, during the overnight and early daylight hours, then gradually lose identity along about 94W by late each morning. Expect a NE-E-SE 15-20 kt wind shift along the trough axis, except 20 to 25 kt along the northern coast of the Yucatan Peninsula this evening, and again on Wed evening. Guidance continues to hint at brief strong conditions will develop again on Fri evening NW of the Yucatan Peninsula. Expect seas to build briefly into a range of 4-6 ft in the vicinity of the strong winds. A surface trough extends from near 28N95W across the western waters to coastal Mexico near 19N95W. The trough will move W and inland across Texas during the overnight hours. Surface ridging will anchor across the NE Gulf waters with a ridge axis extending westward across the northern gulf waters this week. Moderate southerly return flow is forecast across the Gulf waters W of 88W, increasing to fresh breeze each evening. Expect 3 to 5 ft seas throughout the period. However, guidance is suggesting the pressure gradient will tighten on Fri night. with a swath of strong SE winds along 23N between 89W and 94W. Light and variable winds forecast near the ridge axis and will surround the high center, with light to moderate anticyclonic flow forecast E of 88W through Fri night, except becoming a fresh breeze across the Florida Straits during the evenings. Areas of convection will be denoted in the weather grids across the waters W of 90W today through Thu night. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... Atlc high pressure will support fresh E trades, with 5-8 ft seas, across the south-central Caribbean with locally strong nocturnal trades within about 180 nm of the coast of Colombia, and across the Gulf of Venezuela. The pressure gradient will tighten tonight, with the strong E winds expanding W-NW from the Colombian coast to near 15N80W through Thu with the resultant E swell in the form of 7-9 ft seas reaching near 14N82W on Thu, with max seas of 10 ft occurring near 13N76W. Strong nocturnal E to SE trades are forecast across the Gulf of Honduras through Fri night. Tropical waves across the central and eastern Caribbean will continue westward accompanied by a moderate to fresh NE-E-SE wind shift and only a slight enhancement of convection mainly over the N-central Caribbean and interior portions of Hispaniola. Otherwise...scattered showers and tstms also remain active generally N of the Monsoon Trough axis along 09N/10N between Colombia and Costa Rica. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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 HUFFMAN. National Hurricane Center.