675 
AGXX40 KNHC 251939
MIMATS

Marine Weather Discussion
NWS National Hurricane Center Miami FL
339 PM EDT Wed Jul 25 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...

An upper level trough is over the NE Gulf of Mexico and N Florida.
This feature supports a 1013 mb surface low near 30N86W. Diffluence
aloft east of the upper level trough is sustaining convection 
over the W Atlantic off the Florida coast, while diffluence to the
south is producing convection over the south central Gulf of 
Mexico. Convection is expected to continue over these areas 
through Thu. A cold front will enter the NW Gulf tonight, merge
with the trough and stall Thu, then lift north as a trough Fri. 
High pressure will build across the northern waters in the wake 
of the trough. Elsewhere, a surface trough will move off the 
Yucatan Peninsula into the Bay of Campeche each evening, 
accompanied by moderate to fresh nocturnal winds. 

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

Scattered moderate convection is over N Colombia, Panama, and 
Costa Rica. Isolated showers are located over waters S of Puerto 
Rico and Hispaniola between 65W and 75W. These showers are being 
sustained by a small region of shallow moisture and diffluence 
aloft. Relatively dry and stable conditions persist elsewhere. 
Fresh to strong winds will prevail in the south- central 
Caribbean, while gentle to moderate winds are expected elsewhere,
with the exception of light to gentle winds over the western 
Caribbean the next couple of days. The aerial extent of the fresh
to strong easterly winds will increase over the central 
Caribbean by Thu. 

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

Expect convection north of the Bahamas through the weekend.
The surface pressure gradient between an Atlantic 1031 mb 
subtropical high and the low pressure over the southeast U.S. 
will produce moderate to fresh southerly winds across the waters 
north of 25N and west of 70W including Florida coastal waters 
this evening. Moderate to fresh winds are also expected south of
22N, including approaches to the Windward Passage the next couple
of evenings. A surface trough will reach the E part of the 
region this evening and weaken through Thu. Otherwise, high 
pressure will prevail across the area through the remainder of 
the forecast period. 

$$

.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 Latto. National Hurricane Center.