Atlantic & Caribbean Outlook
National Hurricane Center Miami
AGXX40 KNHC 290800
Marine Weather Discussion
NWS National Hurricane Center Miami FL
400 AM 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...
Weak high pressure from the western Atlantic extends westward
to over the eastern portion of the area. Light east to southeast
are noted over the eastern gulf, while fresh to strong southeast
winds are elsewhere per buoy and latest scatterometer data. The
pressure gradient between this high and deepening low pressure
over the central United States will support the southeast winds
over the western gulf to continue to expand in coverage through
Thursday. A thermal trough will also enhance winds over the
eastern Bay of Campeche the next two nights. A cold front
associated with the low will approach the Texas coast tonight,
and move over the northwest Gulf on Thursday, the north central
Gulf Thursday night, and the northeast Gulf on Friday as it
weakens. Mainly strong southerly winds will precede the front,
with possible pockets of winds gusting to near gale force.
Plenty of atmospheric instability will and upper level dynamics
in play is expected to bring numerous showers and thunderstorms
east ahead of the front Thursday through Friday across the
northern gulf. High pressure will become centered north of the
region this upcoming weekend, supporting mainly moderate easterly
winds over the basin.
...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N
BETWEEN 55W AND 64W...
Gentle to moderate trades continue over the Caribbean as a weak
pressure pattern continues, hover high pressure building
southward over the Bahamas will allow for the trades to
increase in the trades to the entire Caribbean beginning this
afternoon. By tonight, fresh to strong southeast winds will
pulse over the Gulf of Honduras and along the NE 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 Saturday
Over the tropical Atlantic waters, mainly moderate trades will
prevail through Wednesday with seas of 5-7 ft. A frontal trough
extending from departing low pressure north of the region will
reach the northern waters as a cold front by Thursday,
disrupting the trade wind pattern with light to gentle winds
prevailing over the northern waters into the weekend. Northerly
swell inducing seas of 6-8 ft will propagate across the northern
waters possibly starting on Friday night.
...SW N ATLANTIC INCLUDING THE BAHAMAS...
Strong to near gale force winds over the far eastern portion of
zone AMZ115 have diminished to strong north winds. Lingering
northeast swell there is producing seas of 8-10 ft. These
conditions will subside through this afternoon, with the
winds becoming moderate to fresh northwest to north as high
pressure over the Bahamas builds east-southeastward through
Thursday in response to a weak cold front that clips the northern
waters. The seas over that portion of the zone will lower to 6-8
ft this afternoon and to 5-7 ft tonight. 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 27N Thursday night. 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 Friday will slide eastward ahead of the front as
the front begins to move 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...
.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 Aguirre. National Hurricane Center.