000
AGXX40 KNHC 180745
MIMATS

Marine Weather Discussion
NWS National Hurricane Center Miami FL
245 AM EST Sat Nov 18 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 ridges across the region from northern
Florida to central Mexico. The ridge will retreat eastward today
as a cold front move into the NW waters tonight. The front will 
extend from Pensacola Florida to Brownsville Texas early Sunday,
from Ft Myers Florida to Veracruz Mexico early Monday, then push
south of the Gulf and weaken through early Tuesday. Fresh to 
strong N to NE winds will prevail north and west of the front
Sunday with seas building to 8-10 ft. Brief gales are possible 
south of 25N west of 95W along the Mexican coastal waters Sun 
and Sun night. Marine conditions will improve significantly Mon 
and Tue as the front progresses east-southeastward.
 
...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN
55W AND 64W... 

Broad troughing prevails in the central Caribbean along 73W.
Surface observations and scatterometer data indicate gentle NE 
winds prevail W of the trough, while gentle ESE winds are noted 
E of the trough axis. Seas are 3-4 ft over the entire Caribbean,
and 4-5 ft in tropical N Atlc waters. Expect for the trough to 
remain nearly stationary in the central Caribbean for a couple
more days, then weaken and eventually dissipate Mon and Tue. 

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

A weakening cold front extends from north of the area near 31N66W
to 27N70W. An active surface trough with multiple weak vortices
embedded along the trough axis extends from a 1007 mb low near
26N57W to 22N65W to Hispaniola near 18N72W. Scatterometer data
shows moderate to fresh N to NE winds north of the trough axis,
and light to gentle southerly winds to the south. Seas are 5-7 
ft NW of the trough, and 4-5 ft SE of the trough outside the 
Bahamas. The trough will linger over southeast waters this
weekend, then weaken Monday. A cold front will move into the NW 
waters Sun afternoon, then reach from 31N72W to south Florida
early Mon, and from 31N60W through the central Bahamas to western
Cuba early Tue. Fresh to strong SW winds will precede the front N
of 28N, and moderate to fresh winds are expected elsewhere in 
association with the cold front, with seas building to 6-9 ft.

$$

.WARNINGS...Any changes impacting coastal NWS offices will be
coordinated through AWIPS II Collaboration Chat, or by
telephone:

.GULF OF MEXICO...
.GMZ017...W CENTRAL GULF FROM 22N TO 26N W OF 94W...
     Gale Warning Sun.
.GMZ023...SW GULF S OF 22N W OF 94W...
     Gale Warning Sun into Sun night. 

.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 Mundell. National Hurricane Center.