000
AXPZ20 KNHC 071032 CCA
TWDEP 

Tropical Weather Discussion...Corrected
NWS National Hurricane Center Miami FL
734 UTC Tue Mar 7 2017

Corrected ITCZ/MONSOON TROUGH section

Tropical Weather Discussion for the eastern Pacific Ocean from
the Equator to 32N, east of 140W. The following information is
based on satellite imagery, weather observations, radar, and
meteorological analysis.

Based on 0600 UTC surface analysis and satellite imagery through
0900 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...  

The ITCZ axis extends from 03N93W to 03N97W to 01N114W to 
03N122W to 00N135W. Scattered moderate convection is present from
03N to 05N between 90W and 101W.

...SPECIAL FEATURE...

GULF OF TEHUANTEPEC GALE WARNING...

Winds have subsided over the Gulf of Tehuantepec but will 
increase once again on Thursday morning. High pressure building 
southward over the Gulf of Mexico will tighten the pressure 
gradient over the area and induce the next Gulf of Tehuantepec gap
wind event. Winds will become fresh to strong over the Gulf of 
Tehuantepec Wednesday morning, with gale conditions expected 
Wednesday night through Thursday. 

...DISCUSSION...   

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

High pressure of 1027 mb centered north of the area near 33N127W
ridges SE to near the Revillagigedo Islands. The pressure 
gradient between this area of high pressure and a trough of low 
pressure over Mexico is supporting moderate to fresh NW winds and
seas in the 4-6 ft range over the offshore waters off the west 
coast of the Baja California peninsula. The gradient between the 
ridge and troughing over Mexico has tightened this afternoon. 
This generated a narrow swath of strong NW winds within 60 nm of
the coast of Baja California from 24N to 29N earlier this evening.

The tighter gradient between the aforementioned high pressure
will generate fresh to strong NW winds across the Gulf of 
California between 25N and 29N through early Wednesday morning.
Seas will build to around 7 ft in the central part of the gulf 
with some areas of open fetch reaching 8 ft. Seas off the west 
coast of the Baja California peninsula will build to 10 ft 
today. The high will shift slightly north Wednesday evening and 
Thursday allowing for winds and seas to decrease over the Gulf of
California, and further decrease over the offshore waters of the
Baja California Peninsula.

OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND 
WITHIN 750 NM OF ECUADOR...

The pressure gradient between strong high pressure centered off 
the east coast of the United States and climatological low 
pressure over Colombia continues to maintain a large area of 
fresh to strong trades over the Caribbean. These winds are 
funneling into the Gulf of Papagayo. Nocturnal drainage flow is 
augmenting the winds. Winds of 20 to 25 kt will continue to pulse
during the late night and early evening hours over the Gulf of 
Papagayo through Friday. The area of strong high pressure will 
heading farther east during the next couple of days but remain 
close enough to maintain the winds over the Gulf of Papagayo. A 
front moving southeastward from the United states will weaken the
high pressure ridge and allow the winds to subside Saturday 
through Tuesday. This synoptic pattern will also cause fresh 
winds to pulse over the Gulf of Panama during the late night and 
early morning hours through the end of the week.

Elsewhere...light to gentle breezes and seas of 4-6 ft will 
prevail through mid week.

REMAINDER OF THE AREA... 

High pressure centered north of the area near 33N127W ridges SE 
to the Revillagigedo Islands. The pressure gradient between this 
area of high pressure and lower pressure near the ITCZ is 
generating moderate to fresh trades from 03N to 20N west of 110W.
NW swell is propagating th