AGXX40 KNHC 171824
Marine Weather Discussion
NWS National Hurricane Center Miami FL
224 PM EDT Thu Aug 17 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 ridge extends across the northern Gulf from a 1019 mb high
centered in the northeast Gulf near 28N87W to the coast of Texas.
Offshore platforms and buoys indicated moderate to fresh winds
in the northwest Gulf between the ridge and lower pressure in
north central Mexico. The northern part of a tropical wave is
moving across the western Yucatan Channel and adjacent Gulf
waters, and will move through the Yucatan peninsula by early Fri,
and across the southwest Gulf through Sat. This will enhance the
normal evening thermal trough that develops over western Yucatan
and moves into the southwest Gulf overnight through Sun,
supporting fresh winds off the west coast of Yucatan each
evening. Little change is expected through early next week.
...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN
55W AND 64W...
A tropical wave reaches from E Hispaniola to NW Venezuela,
bringing scattered showers and thunderstorms to the Virgin
Islands and Puerto Rico. Strong northeast winds have been noted
on a scatterometer pass through the Mona Passage ahead of the
tropical wave. The tropical wave will pass through the western
Caribbean by Sun. This will be ahead of an area of low pressure
that currently is to the east of 55W. This low center is
expected to develop more, possibly into a tropical cyclone and
move into the eastern Caribbean by Sat. The low is expected to
deepen as it tracks WNW through the far northwest Caribbean
through Mon night. Interests in the Caribbean should monitor
carefully the latest Tropical Weather Outlook at hurricanes.gov
for more information on this developing low pressure center.
...SW N ATLANTIC INCLUDING THE BAHAMAS...
The northern part of a tropical wave moving, that is moving
across E Hispaniola, will pass westward to the south of 22N
through early Sat. The tropical wave is in phase with an upper
low, resulting in enhanced convection over a broad area south of
25N between 62W and 72W, which generally will shift westward
with the coupled tropical wave and upper low through the southern
Bahamas and Turks/Caicos Islands. A second feature...an area of
low pressure well to the southeast in the tropical Atlantic is
moving WNW toward the region. Some potential exists for this low
to develop into a tropical cyclone during the next couple of
days as it approaches the area. Strong upper level winds may
weaken it before it crosses 65W north of Puerto Rico by early
Sun. This still will bring strong winds and building seas to the
area south of 25N from Sun through mid week. A ridge along
roughly 28N will move little through Sun then shift slowly
northward early next week, maintaining light to gentle breezes
into early next week north of 28N, with short period southeast
swell of 4 to 6 ft.
.WARNINGS...Any changes impacting coastal NWS offices will be
coordinated through AWIPS II Collaboration Chat, or by
.GULF OF MEXICO...
.CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN
55W AND 64W...
.AMZ033...CARIBBEAN S OF 15N BETWEEN 64W AND 72W INCLUDING
Tropical Storm Warning Fri night into Sat.
.AMZ035...OFFSHORE WATERS WINDWARD ISLANDS INCLUDING TRINIDAD
Tropical Storm Warning Fri into Fri night.
.AMZ037...TROPICAL N ATLANTIC FROM 07N TO 15N BETWEEN 55W AND
Tropical Storm Warning tonight into Fri.
.SW N ATLANTIC INCLUDING THE BAHAMAS...
*For detailed zone descriptions, please visit:
Note: gridded marine forecasts are available in the National
Digital Forecast Database (NDFD) at:
For additional information, please visit:
.Forecaster MT. National Hurricane Center.