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Marine Weather Discussion



000
AGXX40 KNHC 261844
MIMATS

Marine Weather Discussion
NWS National Hurricane Center Miami FL
244 PM EDT Wed Apr 26 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... 

Ridging extends WSW from the western Atlantic across Florida to 
the coast of Texas. Moderate to fresh southeast winds are noted 
over the eastern Gulf. Fresh to strong SE to S winds are observed
over the western Gulf. Seas range from 1 to 3 ft over the 
northeast Gulf and southern Bay of Campeche, 6 to 9 ft over the 
far northwest Gulf, and 3 to 6 ft elsewhere. 

Return flow over the Gulf will decrease this afternoon as a cold
front approaches the Texas coast. The cold front will move off 
the coast of Texas late this evening, followed by fresh to strong
N to NE flow over the NW Gulf. The front will slowly move 
eastward as it weakens. The front will reach from the Mississippi
Delta to the mouth of the Rio Grande by early Thursday. Winds 
and seas diminish across the Gulf by late Thu as the front 
dissipates. Gentle to moderate southerly flow will prevail 
through Thursday night, except for a brief pulse of stronger 
winds off northwest Yucatan. S to SE winds will increase across 
much of the central and western Gulf late Friday through Saturday
ahead of the next approaching cold front. This second, stronger 
front will move off the Texas coast early Sunday. Fresh to strong
NW winds can be expected W of 92W. GFS guidance continues to 
carry the strongest winds and forecasts winds to minimal gale 
force off Tampico and Veracruz Sunday. Other global and ensemble 
models are trending weaker so will continue cap winds below gale 
force with this forecast issuance. The front will weaken Sunday 
night through Monday night as it heads into the eastern Gulf.

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

A relatively weak pressure pattern continues due to the weakness
of the subtropical ridge north of the region. Moderate to fresh 
trade winds persist over the tropical north Atlantic waters W of 
55W to the S of the high pressure ridge over the north central 
Atlantic. Moderate to fresh E to SE winds are noted over the 
eastern Caribbean. Gentle to moderate E to SE winds are occurring
over the central and western Caribbean. The ridge to the N is 
rebuilding, however. Localized fresh to strong winds will pulse 
near the Gulf of Honduras and along the coast of northern 
Colombia during the overnight hours tonight and Thursday night. 
These pulses will grow in strength and areal extent by Friday 
night as the gradient tightens between strong ridging over the 
western Atlantic and troughing approaching from the west. By late
Saturday, the building ridge to the north will support strong 
winds in the Windward Passage and south of Hispaniola near Cabo 
Beata as well. Fresh trade winds and building seas will generally
prevail across the remainder of the region.

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

A dissipating cold front reaches from 31N70W to 28N72W. The 
front will dissipate tonight. Ridging extending across the 
southern Bahamas toward central Florida will shift northward to 
near 29N by Friday and maintain gentle to moderate breezes and 4 
to 6 ft seas in the open Atlantic E of the Bahamas slight seas 
through Friday. Moderate to fresh trade winds will prevail south 
of 22N Saturday through Sunday. SE to S return flow will increase
east of Florida N of 27N and W of 75W by late Sunday as a cold 
front approaches the area from the eastern Gulf of Mexico.

$$

.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...
     None.

.SW N ATLANTIC INCLUDING THE BAHAMAS...
     None.

$$

*For detailed zone descriptions, please visit:
www.nhc.noaa.gov/abouttafbprod.shtml#OWF

Note: gridded marine forecasts are available in the National
Digital Forecast Database (NDFD) at:
www.nhc.noaa.gov/marine/grids.php

For additional information, please visit:
http://www.nhc.noaa.gov/marine

$$

.Forecaster McElroy. National Hurricane Center.