Marine Interpretation Message
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000
AGXX40 KNHC 270637
MIMATS

Marine Weather Discussion
NWS National Hurricane Center Miami FL
237 AM EDT Thu Jul 27 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...

Most of the convective activity from the daytime hours has
diminished during the evening and early morning hours. Persistent
ridging across the northern Gulf of Mexico, except for a series
of weak troughs in the NE Gulf, will maintain gentle winds and
seas mainly 2 ft or less N of 22N through the remainder of the
week and into the first half of the upcoming weekend. A weak cold
front will approach the N central and NE Gulf by the second half
of the weekend, with winds increasing and seas building over the
NE Gulf as a result. A thermal trough over the NW Yucatan will
form each afternoon and move westward across the far SW Gulf
through the evening and overnight hours, enhancing winds to
moderate to fresh.

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

Ridging N of the area continues to support fresh to locally strong
trade winds over the S central Caribbean, mainly NW of the coast
of Colombia and western Venezuela. Buoy observations and recent
altimeter satellite data show seas of 5 to 7 ft in the S central
Caribbean. Moderate to locally fresh trade winds are noted
elsewhere. The strongest winds and seas will remain confined to
the S central Caribbean as a weak pressure gradient holds in
place through the upcoming weekend into early next week.

In the tropical N Atlantic, moderate trades will prevail through
the remainder of the week and into the upcoming weekend, along
with 4 to 6 ft seas. A surge of fresh trades will follow the
passage of a tropical wave by late in the weekend into early
next week, building seas to 6 to 8 ft N of 10N. These conditions
will also spread across the islands and into the NE Caribbean
early next week.

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

Ridging extending from high pressure in the central Atlantic
will support gentle to moderate winds N of 23N through early
Friday, with moderate to fresh trades S of 22N. Southwesterly
flow around the ridging will increase off NE Florida and N of
Grand Bahama throughout the day Friday, as troughing deepens
over the Carolinas. Model guidance suggests weak low pressure
along a sagging weak front dropping southward from Georgia into
northern Florida by the end of the weekend, with the associated
front laying down just N of 31N by late Sunday into early next
week. The northern extent of a tropical wave may move into zone
AMZ127 in the SE waters early next week brining a surge of
increasing winds and seas.

$$

.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 Lewitsky. National Hurricane Center.



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