Marine Interpretation Message
Issued by NWS
AGXX40 KNHC 291850
Marine Weather Discussion
NWS National Hurricane Center Miami FL
250 PM EDT Wed Mar 29 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...
Surface high pressure over the SW Atlantic extends a ridge axis westward
to over the eastern Gulf, thus providing light to moderate east
to southeast winds to near 88W. The pressure gradient between
this high and deepening low pressure over the central United
States supports fresh to strong southeast winds elsewhere. A
cold front associated with the low will come off the Texas coast
early this evening and move over the northwest Gulf waters
Thursday, and over the northeast basin Friday through early
Saturday. Fresh to strong southerly winds will precede the front
N of 20N W of 90W through early Thursday morning. A thermal
trough will enhance winds over the eastern Bay of Campeche and
north-northwest of the Yucatan Peninsula S of 24N tonight and
tomorrow night. Otherwise, plenty of atmospheric instability
associated with upper level dynamics is expected to bring
numerous showers and thunderstorms ahead of the front through
Friday. Another area of low pressure will build over the southern
United States over the weekend, which will support the
continuation of fresh to locally strong southeasterly winds over
the western basin.
...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N
BETWEEN 55W AND 64W...
Gentle to moderate trades continue over the Caribbean due to the
continuation of a weak pressure pattern. However, high pressure
building over the SW N Atlc will allow for the trades to
become fresh at night mainly over the central and south-central
Caribbean while fresh to strong winds are forecast for the Gulf
of Honduras and along the coast of Colombia. This pattern of
moderate to fresh trades over the majority of the Caribbean and
fresh to strong winds over the Gulf of Honduras and Colombia
coast will persist through the upcoming weekend. Over the
tropical Atlantic waters, mainly moderate trades will prevail
through Wednesday with seas of 5-7 ft. The tail of a cold front
will reach the northern waters Saturday night with northerly
swell inducing seas of 6-9 ft propagating southward through the
end of the weekend.
...SW N ATLANTIC INCLUDING THE BAHAMAS...
Northeast swell is producing seas of 8-9 ft in zone AMZ115.
These conditions will subside tonight, with the winds becoming
moderate and from the northwest as high pressure over the
Bahamas builds east-southeastward through Thursday in response to
a weak cold front that clips the northern waters. The
aforementioned high pressure will bring light to moderate
anticyclonic winds to the western portion of the basin through
Thursday. Mainly a moderate northerly wind shift will accompany
the front, before it dissipates along about 25N Friday morning.
After that time, return flow will develop and the pressure
gradient will increase over the northwest waters between high
pressure over the northeast Atlantic and an approaching front
over the inland southeastern United States. The strong southerly
winds across the northwest zones will slide eastward ahead of
the front as it moves across the northwest zones on Saturday.
Seas to 8 ft can be expected in this southerly flow ahead of the
front. The front will then reach from near Bermuda to south
Florida by Saturday night, and move across the northeast waters
early on Sunday before exiting the area on Sunday afternoon.
Fresh to strong west to northwest winds may possibly follow the
front over zone AMZ115 on Sunday.
.WARNINGS...Any changes impacting coastal NWS offices will be
coordinated through AWIPS II Collaboration Chat, or by
.GULF OF MEXICO...
.GMZ013...N CENTRAL GULF INCLUDING FLOWER GARDEN BANKS MARINE
GALE CONDITIONS POSSIBLE Mon.
.GMZ015...NE GULF N OF 25N E OF 87W...
GALE CONDITIONS POSSIBLE Mon.
.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 Ramos. National Hurricane Center.