000 AGXX40 KNHC 291850 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 250 PM EDT Wed Mar 29 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... Surface high pressure over the SW Atlantic extends a ridge axis westward to over the eastern Gulf, thus providing light to moderate east to southeast winds to near 88W. The pressure gradient between this high and deepening low pressure over the central United States supports fresh to strong southeast winds elsewhere. A cold front associated with the low will come off the Texas coast early this evening and move over the northwest Gulf waters Thursday, and over the northeast basin Friday through early Saturday. Fresh to strong southerly winds will precede the front N of 20N W of 90W through early Thursday morning. A thermal trough will enhance winds over the eastern Bay of Campeche and north-northwest of the Yucatan Peninsula S of 24N tonight and tomorrow night. Otherwise, plenty of atmospheric instability associated with upper level dynamics is expected to bring numerous showers and thunderstorms ahead of the front through Friday. Another area of low pressure will build over the southern United States over the weekend, which will support the continuation of fresh to locally strong southeasterly winds over the western basin. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... Gentle to moderate trades continue over the Caribbean due to the continuation of a weak pressure pattern. However, high pressure building over the SW N Atlc will allow for the trades to become fresh at night mainly over the central and south-central Caribbean while fresh to strong winds are forecast for the Gulf of Honduras and along the coast of Colombia. This pattern of moderate to fresh trades over the majority of the Caribbean and fresh to strong winds over the Gulf of Honduras and Colombia coast will persist through the upcoming weekend. Over the tropical Atlantic waters, mainly moderate trades will prevail through Wednesday with seas of 5-7 ft. The tail of a cold front will reach the northern waters Saturday night with northerly swell inducing seas of 6-9 ft propagating southward through the end of the weekend. ...SW N ATLANTIC INCLUDING THE BAHAMAS... Northeast swell is producing seas of 8-9 ft in zone AMZ115. These conditions will subside tonight, with the winds becoming moderate and from the northwest as high pressure over the Bahamas builds east-southeastward through Thursday in response to a weak cold front that clips the northern waters. The aforementioned high pressure will bring light to moderate anticyclonic winds to the western portion of the basin through Thursday. Mainly a moderate northerly wind shift will accompany the front, before it dissipates along about 25N Friday morning. After that time, return flow will develop and the pressure gradient will increase over the northwest waters between high pressure over the northeast Atlantic and an approaching front over the inland southeastern United States. The strong southerly winds across the northwest zones will slide eastward ahead of the front as it moves across the northwest zones on Saturday. Seas to 8 ft can be expected in this southerly flow ahead of the front. The front will then reach from near Bermuda to south Florida by Saturday night, and move across the northeast waters early on Sunday before exiting the area on Sunday afternoon. Fresh to strong west to northwest winds may possibly follow the front over zone AMZ115 on Sunday. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... .GMZ013...N CENTRAL GULF INCLUDING FLOWER GARDEN BANKS MARINE SANCTUARY... GALE CONDITIONS POSSIBLE Mon. .GMZ015...NE GULF N OF 25N E OF 87W... GALE CONDITIONS POSSIBLE Mon. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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 Ramos. National Hurricane Center.