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AGXX40 KNHC 210715
MIMATS

Marine Weather Discussion
NWS National Hurricane Center Miami FL
315 AM EDT Thu Sep 21 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 each evening over the NW Yucatan Peninsula, move W-NW across the SW Gulf during the overnight hours and dissipate over the SW Gulf waters by late each morning. Expect the trough to be accompanied by a moderate to locally fresh NE-E-SE wind shift and brief seas to 4 ft. A surface high will meander over the N-Central waters through Thu night, then shift N and inland Louisiana on Fri with light to locally moderate anticyclonic flow and 1 to 3 ft seas through Mon.


...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W...

Marine interests should monitor the latest NHC bulletins concerning major hurricane Maria currently moving to the north of Hispaniola, with seas in excess of 35 ft. Strong or greater southerly flow expected across the Caribbean waters N of 15N E of 73W today. Expect wind/sea conditions across the NE passages to diminish to 20 kt or less, and seas to subside to less than 8 ft on Fri morning. Fresh N winds and seas to about 8 ft expected in the Windward Passage late Thu night into Fri morning. Elsewhere, moderate to locally fresh trades will return by Sun evening.


...SW N ATLANTIC INCLUDING THE BAHAMAS...

Major Hurricane Maria is off the north coast of the Dominican Republic, moving NW. Maria will begin to move more NNW this morning and later N in response to a weakness in the subtropical ridge. This track keeps the center of Maria E of the central and northern Bahamas. Given that forecast track and intensity accuracy decreases further into the future, marine interests throughout the region should continue monitoring the latest bulletins issued by the National Hurricane Center on Hurricane Maria.

$$


.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...
.AMZ023...CARIBBEAN N OF 15N BETWEEN 64W AND 72W... Tropical Storm Warning early today.


.SW N ATLANTIC INCLUDING THE BAHAMAS...
.AMZ117...BAHAMAS INCLUDING CAY SAL BANK... Tropical Storm Warning tonight into Fri night.
.AMZ119...ATLANTIC FROM 22N TO 27N E OF BAHAMAS TO 70W... Tropical Storm Warning today. Hurricane Warning tonight into Fri night.
.AMZ121...ATLANTIC FROM 22N TO 27N BETWEEN 65W AND 70W... Tropical Storm Warning today. Hurricane Warning tonight. Tropical Storm Warning Fri into Fri night.
.AMZ123...ATLANTIC S OF 22N W OF 70W INCLUDING APPROACHES TO THE WINDWARD PASSAGE... Tropical Storm Warning early today. Hurricane Warning today into Fri.
.AMZ125...ATLANTIC S OF 22N BETWEEN 65W AND 70W INCLUDING PUERTO RICO TRENCH... Hurricane Warning early today into tonight. Tropical Storm Warning Fri.

$$

*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 Christensen. National Hurricane Center.

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