Marine Interpretation Message
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510
AGXX40 KNHC 281806
MIMATS

Marine Weather Discussion
NWS National Hurricane Center Miami FL
206 PM EDT Fri Apr 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 extends W from the Atlantic over the gulf along
roughly 28N. A surface trough heads SSE from Texas along the
Tamaulipas and Veracruz coast of Mexico to the Isthmus of
Tehuantepec. Moderate to fresh SE winds are being steered around
the ridge over the entire Gulf, except for the NW Gulf, where
satellite-derived wind data and buoy observations indicate fresh
to strong return flow from the SE has developed with seas
building to between 5 and 7 ft. SE to S flow will continue to
increase over much of the central and western Gulf through
tonight, between the ridging extending W from the Atlantic, and
the low pressure trough over Texas and eastern Mexico. The low
pressure trough will continue to sharpen Saturday, supporting
strong SE to S winds across the Gulf. Seas will build to between
8 to 13 ft with highest seas expected over the NW Gulf. A cold
front will move off the Texas coast early Sunday, bringing the
possibility of winds to minimal gale force to the Mexican coast
near Tampico and Veracruz Sunday night. The front will move
slowly east and weaken. Winds and seas will diminish through
Monday night. The front will eventually dissipate on Tuesday as
it nears the area from the Big Bend of Florida to east central
Mexico.

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

The latest satellite-derived winds indicated fresh SE winds
pulsing northward from the coast of Honduras to Belize and strong
winds pulsing along the north coast of Colombia. Moderate to
fresh E to SE winds are noted elsewhere. These pulses will grow
in strength and areal extent through Saturday as the gradient
tightens between stronger ridging over the western Atlantic and
troughing over the Gulf of Mexico. By Saturday afternoon, the
building ridge to the north will support strong winds in the
Windward Passage and south of Hispaniola near Cabo Beata. Fresh
trade winds and building seas will generally prevail across the
remainder of the region. Low pressure moving eastward into the
Western Atlantic will weaken the ridge to the north and allow
winds and seas to subside on Monday and Tuesday.

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

Ridging will linger along roughly 28N through Sunday. This will
support gentle to moderate breezes north of 24N, with moderate to
fresh trade winds farther south. Winds will increase to fresh to
strong at night near the approaches to the Windward Passage
tonight through Monday night. SE to S return flow will increase
east of Florida north of 27N and west of 75W by late Monday as a
weakening cold front approaches the area from the eastern Gulf of
Mexico. Looking ahead, the gradient will relax again on Tuesday
and Wednesday as the high to the north weakens and the front
dissipates.

$$

.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 CONDITIONS POSSIBLE Sun.
.GMZ023...SW GULF S OF 22N W OF 94W...
     GALE CONDITIONS POSSIBLE 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 McElroy. National Hurricane Center.



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