AGXX40 KNHC 221800
Marine Weather Discussion
NWS National Hurricane Center Miami FL
200 PM EDT Sun Jul 22 2018
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...
The most recent scatterometer data indicate light to gentle
winds across the Gulf waters S of 26N under the influence of a
ridge, anchored by a 1017 mb high pressure located near 24N92W.
The ridge extends SE into the NW Caribbean. A surface trough is
over the NE Gulf, and extends from 30N83W to 28N87W. Fresh to
locally strong westerly winds are noted behind the trough to
about 90W. These winds will persist over the NE Gulf tonight
into Mon, with seas building to near 7 ft. The trough will be
followed by a weak cold front that will move over the northern
Gulf waters through Wed. This front will become stationary and
weaken to a trough by Thu. A surface trough will move off the
Yucatan Peninsula into the Bay of Campeche each evening,
accompanied by fresh nocturnal winds. Elsewhere, a ridge will
...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN
55W AND 64W...
Latest scatterometer data provided observations of strong to near
gale force winds over he south-central Caribbean, with gentle to
moderate winds prevailing over the remainder of the Caribbean S
of 18N as well as the tropical N Atlc forecast waters. Light to
gentle anticyclonic flow is noted over the NW Caribbean. Seas are
in the 8-12 ft range over the south-central Caribbean with the
strongest winds, 5-6 ft over the north central Caribbean, 4-5 ft
over the eastern Caribbean, and 3-4 ft over the western
Caribbean. Over the tropical N Atlc forecast zones, seas are in
the 5-6 ft range. High pressure north of the area will support
strong to near gale force winds in the south- central Caribbean
through tonight before winds diminish. Then, fresh to strong
winds will prevail in the south-central Caribbean, with gentle to
moderate winds blowing elsewhere the next several days.
...SW N ATLANTIC INCLUDING THE BAHAMAS...
The Atlantic high pressure combined with a low pressure system
over the SE CONUS will produce moderate to fresh southerly winds
across the waters just offshore the central and NE Florida
through Wed. Moderate to fresh winds are also expected S of 22N W
of 70W, including approaches to the Windward Passage most of the
forecast period, with building seas to 5 or 6 ft. A ridge across
the northern waters will remain in place today before lifting N
Mon through Wed. A mid to upper level trough along the southeastern
U.S. will continue to promote scattered showers and thunderstorms
across the waters N of 27N through the middle part of next week.
A surface trough will reach the E part of the region by Thu.
.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...
.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 GR. National Hurricane Center.