Marine Interpretation Message
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000
AGXX40 KNHC 260629
MIMATS

Marine Weather Discussion
NWS National Hurricane Center Miami FL
229 AM EDT Wed Apr 26 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 remains in place from the western Atlantic across
the south Florida, then extending northwest to the coast of
Texas. Moderate to fresh southeast winds are noted over the
northwest Gulf currently, between the ridge and a trough over
west Texas and northeast Mexico. Seas range from 1 to 2 ft over
the northeast Gulf, 4 to 6 ft over the far northwest Gulf, and 2
to 4 ft elsewhere.

The southerly return flow over the northeast Gulf will increase
later this morning with seas building to 8 ft off Texas ahead of
an approaching cold front. The cold front will move off the
coast of Texas late today, followed by strong northerly flow
into the northwest Gulf. The front will slowly move eastward,
and weaken as it reaches from the mouth of the Mississippi River
to the mouth of the Rio Grande by early Thursday. Winds and seas
diminish across the Gulf by late Thu as the front dissipates.
Gentle to moderate southerly flow will prevail through Thursday
night, except for a pulse of stronger winds off northwest
Yucatan. The southerly flow increases across much of the central
and western Gulf late Friday through Saturday ahead of an
approaching cold front. This second, stronger front will move off
the Texas coast early Sunday followed by fresh to strong
northwest flow. The operational GFS is showing winds to minimal
gale force off Tampico and Veracruz Sunday, but this seems to be
an outlier. Other global and ensemble models are trending weaker
and will hold off on increasing winds at this time. The front
will weaken through late Sunday night as it reaches from the
western Florida Panhandle to the southwest Gulf.

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

A relatively weak pressure pattern continues across the basin as
a series of cold front and troughs have eroded the subtropical
ridging north of the region. moderate to fresh trade winds
persist over the tropical north Atlantic waters west of 55W south
of high pressure over the north central Atlantic. Gentle to
moderate east to southeast flow is noted over the central and
western Caribbean. Ridging is becoming re-established however,
and localized fresh to strong winds will pulse around the Gulf of
Honduras and off Colombia during overnight hours tonight and
Thursday night. These pulses will grow in areal extent by Friday
night as the gradient tightens between strong ridging over the
western Atlantic and troughing approaching from the west. By late
Saturday, the building ridge to the north will support strong
winds in the Windward Passage and south of Hispaniola near Cabo
Beata as well, with fresh trade winds and building seas across
the remainder of the region.

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

A dissipating cold front reaches from 31N71W toward the central
Bahamas will become diffuse through the remainder of tonight.
Sharp ridging reaching across the southern Bahamas toward the
Straights of Florida will shift northward to 27N/28N through
Thursday, maintaining gentle to moderate breezes and slight seas
through Friday, with moderate to fresh trade winds south of 22N
Saturday into Sunday. Southerly return flow will increase off
northeast Florida by late Sunday ahead of a cold front
approaching the area through the Gulf of Mexico.

$$

.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 Christensen. National Hurricane Center.


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