000 AGXX40 KNHC 111650 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 1150 AM EST Sat Nov 11 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 NW to SE orientated trough will meander across the SW gulf waters through Wed, with moderate to locally fresh NW flow, and 3 to 5 ft seas, continuing to the SW of the trough, except brief strong pulses are forecast near 19.5N96W during the afternoons beginning on Mon with seas building briefly to 7 ft near the strong winds. Continental high pressure strengthening N of the area will result in locally strong NE flow developing across the E gulf waters this evening, with these conditions continuing through Sun evening, then shifting to across the S-central waters on Mon evening. The pressure gradient is expected to relax on Tue and Wed, with moderate NE-E flow setting up E of 90W and moderate SE return flow setting up to the W of 90W. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... The southern end of a TUTT extends across the N-Central and SW Caribbean with an associated 1007 mb surface low analyzed at 13N81W. Locally strong convection is currently along a line from the Windward Passage to 15N81W. The low is forecast to meander over the SW Caribbean through early Sun, shifting to the NW coast of Colombia on Sun night along a low level trough that will then extend NW to the Gulf of Honduras and continue through early Tue. The trough will reorientate N to S from the Windward Passage to Panama with the low shifting N along the trough during mid week. Fresh to locally strong NE winds will continue across the NW Caribbean through tonight, with moderate to locally fresh N-NE winds forecast then forecast through early Wed. Moderate E-SE flow is expected E of the 75W through the middle of next week, except becoming light southerly flow across the N-Central waters near the trough during mid week, while fresh southerly winds develop S of 13N within 180 nm E of the low. ...SW N ATLANTIC INCLUDING THE BAHAMAS... A cold front is stalling from 31N68W to 28N81W. Strong to near gale force NE-E winds, with seas to 13 ft, are observed across the waters N of the Bahamas. These strong NE-E winds will spread S through the northern Bahamas and Bahama Channel tonight, with seas to 9 ft in the exposed waters throughout the northern Bahamas on Sun. Winds and seas will subside to 20 kt or less and less than 8 ft on Sun night into Mon, before reinforcing high pressure in the wake of a secondary cold front, will drive winds back up to 20 kt with seas building back to 8 ft N of the Bahamas on Tue. A broad trough deep layered trough extends NE from the Windward Passage to just S of Bermuda. Abundant debris moisture, originating in the N-Central Caribbean, continues across the discussion waters E of the trough supporting scattered convection. This trough will weaken and drift W early this week eventually being overrun by the cold fronts previously mentioned. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *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 Nelson. National Hurricane Center.