Marine Interpretation Message
Issued by NWS
AGXX40 KNHC 281841
Marine Weather Discussion
NWS National Hurricane Center Miami FL
241 PM EDT Tue Mar 28 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...
Light winds prevail over the eastern Gulf with moderate to fresh
southeast winds over the Western gulf as weak high pressure is
now centered from Florida to the Bahamas. 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 increase to 20 to 25 kt tonight 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 cross the northwest Gulf on Thursday, the north central
Gulf Thursday night, and the northeast Gulf on Friday. Strong to
near gale southerly winds and numerous showers and thunderstorms
are expected to spread east ahead of this 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 winds cover the Caribbean today as a weak
pressure pattern continues. High pressure building southward
over the Bahamas will bring an increase in the trades to the
entire Caribbean starting tonight. By Wednesday night, 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 night.
Over the tropical Atlantic waters, mainly moderate trades will
prevail through Wednesday with seas of 5 to 7 ft. A frontal
trough extending from departing low pressure north of the region will
reach the northern waters by Thursday, disrupting the trade wind
pattern with light to gentle winds prevailing over the
northern waters into the weekend. Northerly swell of 6 to 8 ft
from the low will propagate across the northern waters late this
...SW N ATLANTIC INCLUDING THE BAHAMAS...
The low that has been crossing our northeast zones the past few
days has finally exited the zones this afternoon. Gale force
winds over the northwest quadrant will continue to clip our
extreme NE waters north of 29N east of 66W through this evening.
Strong to near gale force winds will persist across this
northeast zone into Wednesday morning, with large swell up to 18
ft across our eastern zones diminishing below 8 ft late Wednesday
night. High pressure is building over the Bahamas with light
winds. This high will expand in coverage through Wednesday over
our waters. Then, a cold front is expected to dip southward over
the northern zones Wednesday night, forcing the high to slide
southeastward and weaken. 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 a
approaching front over the inland southeastern United States.
The strong southerly winds across the northwest zones Friday will
slide east ahead of the front as the front begins to move across
the northwest zones on Saturday. Seas to 9 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.
.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...
.AMZ115...ATLANTIC FROM 27N TO 31N BETWEEN 65W AND 70W...
Gale Warning today into tonight.
*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 Latto. National Hurricane Center.