Marine Interpretation Message
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377
AGXX40 KNHC 221715
MIMATS

Marine Weather Discussion
NWS National Hurricane Center Miami FL
115 PM EDT Mon May 22 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...

A stationary front and low pressure along the Texas coast
supports thunderstorms within 120 nm of the Texas coast. This
thunderstorm activity will continue through the night while
shifting east as the low tracks northeast, just inland over
Louisiana. Weak high pressure will remain over the rest of the
Gulf supporting moderate winds and generally fair weather through
Tuesday. The only other exception will be a thermal trough
developing over the Yucatan Peninsula late this afternoon and
moving westward over the eastern Bay of Campeche tonight. This
trough will support strong easterly winds over the eastern Bay of
Campeche after sunset tonight, until just before sunrise
Tuesday.

A late season cold front will reach the northwestern Gulf early
Wednesday morning, crossing the Gulf Wednesday through Thursday,
before stalling across the Florida Straits late Thursday.
Scattered to numerous showers and thunderstorms are expected
along and just ahead of this front. Fresh to strong winds are
expected to develop east of the front over the northeastern Gulf
Wednesday night. Weak high pressure will then build across the
eastern Gulf late this week.

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

The eastern Pacific monsoon trough will continue to cross central
America, reaching portions of the southwest Caribbean supporting
showers and thunderstorms the next few days. A westward moving
tropical wave will cross the central Caribbean Tuesday, and the
western Caribbean Wednesday and Thursday.

The pressure gradient between high pressure over the western
Atlantic and low pressure over South America will continue to
support fresh to strong trades over the south-central Caribbean
and the Gulf of Honduras through tonight. The high will slide
east and strengthen through the middle of the week, causing the
areal coverage of the stronger winds to expand northward over the
central Caribbean.

Across the tropical Atlantic waters, the combination of 15 to 20
kt trades and northeast swell will support 7 to 8 ft seas over
these waters through Tuesday. A tropical wave will reach these
waters late this week.

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

High pressure centered northeast of the Bahamas will slide east
through Tuesday and become centered over the central Atlantic as
it merges with a broader area of high pressure to the north. A
cold front will then approach the area from the west on
Wednesday. This transition will result in a gradual increase in
southerly winds offshore Florida the next two days, with winds
reaching 20 to 30 kt by Wednesday afternoon with seas building
to 10 ft over the waters east of north Florida. The cold front
will reach the waters east of northern Florida on Thursday, then
from 31N73W to south Florida by Friday morning. The front will
then begin to weaken over the western Atlantic by Saturday.
Numerous showers and scattered thunderstorms are forecast along
and just east of the front Wednesday night through Thursday.

$$

.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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