000
AGXX40 KNHC 180611
MIMATS

Marine Weather Discussion
NWS National Hurricane Center Miami FL
211 AM EDT Fri May 18 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 trough extends southwest from the western Florida Panhandle to
the central gulf waters while a weak 1013 mb high pressure is
located near 27N92W. Under this weather pattern, mainly light to
gentle winds prevail, with the exception of gentle to moderate
southerly return flow over the far western Gulf N of 22N. The 
trough will dissipate today as high pressure builds westward 
across the Gulf waters. Latest marine guidance suggests that 
another trough will develop over the eastern Gulf Sat night into
Sun. Winds are forecast to increase to 15-20 kt near the northern
end of the trough, and over the northeastern Gulf Coast Sun night
into Mon.

A thermal trough will develop over the evening hours over the
Yucatan peninsula before pushing offshore into the SW each 
night. A surge of mainly fresh winds will be associated with 
this trough. 

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

Atlantic high pressure will maintain fresh to locally strong
trades across the Caribbean generally to the south of 18N and
east of 80W through the upcoming weekend, with highest seas of
10 ft forecast off the northwest coast of Colombia. Recent 
altimeter pass indicates seas to near 8 ft just E of the of the 
Lesser Antilles. Moderate to fresh trades will build seas to 8 ft
E of the Leeward Islands today, and E of the Windward Islands 
Sat through Mon night. Broad low pressure will develop across the
southwest Caribbean early next week and drift northward reaching
the Gulf of Honduras during the middle of next week. 

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

A ridge, with axis across the N waters, will dominate the
forecast area through early next week supporting fresh to 
locally strong winds across the tropical waters, including the 
approaches to the northern Caribbean Passages. The most recent
ASCAT pass provides observations of fresh to strong winds across
the waters S of 25N between 64W and 70W. An altimeter pass 
indicates seas to 9 ft just N of Haiti. The area of fresh to 
strong E-SE winds will expand across the waters S of 27N between 
60W and 77W by Sat morning, with seas building to 10 ft just N 
of Hispaniola by Sat evening.

$$

.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 GR. National Hurricane Center.