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AGXX40 KNHC 211955
MIMATS

Marine Weather Discussion
NWS National Hurricane Center Miami FL
355 PM EDT Tue Aug 21 2018

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 weak E to W ridge will extend across the gulf waters along 26N-27N with a surface high developing along the ridge near 27N93W today, then meander over the northwest gulf through late Thu. A weak frontal trough will move SE into the NE and N central gulf waters Wed where it will stall along 26N-27N on Thu, and then drift W and dissipate on Fri. Typical Yucatan thermal trough will develop each late afternoon-evening and shift W across SW Gulf waters overnight. Models indicating only brief evening winds aoa 20 kt. High pres will build SW across entire basin late Fri and Sat to produce light to moderate anticyclonic wind flow area wide.


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

Strong nocturnal easterly trades are expected along NW Colombia waters and Gulf of Venezuela through early Thu, with the strong winds reaching as far north as 15N. A tropical wave along 83W will continue west and across the western Caribbean tonight. A second tropical wave along 64W will move across the central Caribbean during mid week. A third tropical wave in the central Atlantic along 38W will reach along 55W on Thu. Atlantic basin remains unusually quiet, and stable with aforementioned waves not expected to produce atypical wave related weather. Atlc and Carib seas remain aob normal heights.


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

Atlc ridge will meander from the central Atlc to Port Canaveral Florida for the next several days. A broad N to S oriented trough across the NW Bahamas will move WNW across the Bahamas today and dissipate tonight. Gentle to locally moderate southerly winds are expected north of ridge, moderate to fresh trades are expected south of 23N, while a gradual wind shift is forecast along the trough.

$$


.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 Stripling. National Hurricane Center.

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