Marine Interpretation Message
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000
AGXX40 KNHC 280605
MIMATS

Marine Weather Discussion
NWS National Hurricane Center Miami FL
205 AM EDT Fri Jul 28 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...

Weak ridging will continue over the Gulf through Friday night,
supporting mainly gentle to moderate winds and seas of 1 to 3 ft.
The only exception will be fresh northeast winds over the
eastern Bay of Campeche at night associated with a thermal
trough. An upper low over Cuba, and a surface trough over the
northeastern Gulf, will support scattered thunderstorms over the
eastern Gulf through Friday night.

The pattern will change on Saturday as a cold front crosses the
southeastern United States and enters the north central and
northeastern Gulf late Saturday. This front will be accompanied
by numerous showers and embedded thunderstorms as it drifts
slowly south to around 28N Saturday night through Sunday. The
front will then stall out by Sunday night along about 28N and
meander over the central and eastern Gulf waters as it
transitions to a trough through early next week. This stalled
front and then surface trough will enhance shower and
thunderstorm activity over the eastern half of the Gulf through
the middle of next week. Fresh westerly winds will arrive over
the northeastern Gulf on Saturday through Sunday ahead of the
front, with briefly fresh northerly winds also possible over the
northeastern Gulf through Sunday to the north of the front. As
the front stalls out Sunday night, expect mainly gentle to
moderate winds to prevail over the Gulf through early next week,
except stronger winds near thunderstorms over the eastern Gulf.

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

Through Sunday night, ridging north of the area will continue to
support fresh to locally strong trades across the central
Caribbean mainly to the S of 17N between 65W and 80W, with the
strongest winds along the coasts of NW Venezuela and Northern
Colombia, with the area of strong winds extending as far N as 15N
just prior to sunrise each morning. On Monday, enhanced trade
winds from a tropical wave passage will produce fresh to locally
strong east to northeast winds over the tropical Atlantic waters,
Leeward Islands, northeastern Caribbean, and along the southern
coast of Hispaniola, lasting through Wednesday. Seas will build
to 8 ft over the tropical Atlantic waters north of 15N Monday
night, reaching the Atlantic passages of the northeastern
Caribbean Islands on Tuesday.

The ridge north of the region will expand westward Monday night
through mid week which will support fresh to strong east winds
over the Gulf of Honduras each night.

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

A ridge of high pressure will extend across the Bahamas the next
few days. Moderate to locally fresh southerly flow will develop
W of 77W and N of the ridge on Fri, and continue through Sat
ahead of a weak cold front sliding off the Georgia coast late
Saturday night. The front will stall from around 31N78W to 29N82W
on Monday, before dissipating to a trough and drifting
northwestward mid week. This frontal system will support enhanced
shower and thunderstorm activity over the waters within a couple
of hundred miles of the frontal boundary.

Elsewhere, moderate to locally fresh easterly flow is forecast
south of the ridge axis through Monday. By Monday night, a
tropical wave crossing the southeastern waters will be followed
by a freshening of the trades with occasionally strong east to
northeast winds possible south of 22N Monday night through
Wednesday, with seas building to 6 to 9 ft, highest over the
southeastern zone AMZ127.

$$

.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.



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