Marine Interpretation Message
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000
AGXX40 KNHC 170632
MIMATS

Marine Weather Discussion
NWS National Hurricane Center Miami FL
132 AM EST Sun Dec 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 warm front extending from low pressure over the NW Gulf to
near 28N88W will lift north of the basin through this morning. A
stationary front from 28N88W across southern Florida will
dissipate today. A surface trough that extends south from the low
will meander over the NW Gulf late this morning through early
Sun night before drifting onshore from Louisiana to Texas to NE
Mexico. The strong easterly winds to the north of the warm front
over the NW gulf will exit the basin later this morning as the
front lifts north. Mainly moderate to fresh SE winds and seas of
3 to 5 ft will prevail east of the surface trough through Sun
night as high pressure becomes established just east of the
Florida peninsula. Light winds can be expected W of the trough.
Once the trough moves onshore, mainly moderate SE flow will
dominate the Gulf basin through early next week.

A weak cold front is forecast to reach the NW Gulf early Wed and
cross the northern portion of the basin from west to east through
early Thursday. Brief fresh winds can be expected with this
front.

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

High pressure to the N of the basin will remain sufficiently
strong to support a tight pressure gradient over the central
Caribbean through Tuesday, capable of producing nocturnal Gale
force winds north of the NW coast of Colombia. Fresh to strong
E to NE winds are expected elsewhere over the central Caribbean,
including the Windward Passage through this time frame. The high
pressure will weaken Tuesday through Wednesday which will
diminish winds by about 3 to 5 kt over the central Caribbean,
likely keeping winds just below gale force N of NW Colombia
Tuesday, Wednesday and Thursday nights. The stronger winds early
this week will be supporting seas to 15 ft during the mornings
through Tuesday morning, with a large area of 8 to 12 ft
extending across the central and SW Caribbean during that time.
Elsewhere over the Caribbean, mainly moderate to locally fresh E
to NE can be expected the next several days with generally dry
conditions.

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

A cold front extending from 28N65W to the NW Bahamas will
continue to progress east and will move E of 65W N of 23N through
today. High pressure will build in the wake of the front today
and will become centered just east of central Florida near
28N76W for Monday and Tuesday. This pattern will support gentle
winds and seas of 3 to 5 ft N of 26N, with moderate to fresh NE
winds S of 26N, with seas of 5 to 7 ft outside of the Bahamas.
The high will weaken and shift SE Tuesday night, becoming
centered east of the Bahamas near 25N70W for Wednesday and
Thursday. This will allow for fairly benign marine conditions
across the waters S of 31N and N of 23N during this time frame.
The only exception will be the potential of a cold front to clip
the waters N of 30N, which could increase winds later this week.
S of 23N, the periphery of the high will support moderate to
fresh NE to E winds Wednesday 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...
.AMZ031...CARIBBEAN FROM 11N TO 15N BETWEEN 72W AND 80W
INCLUDING COLOMBIA BASIN...
     Gale Warning early today into Mon.
     GALE CONDITIONS POSSIBLE Mon night.

.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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