000
AXPZ20 KNHC 140304
TWDEP 

Tropical Weather Discussion 
NWS National Hurricane Center Miami FL
0405 UTC Tue Mar 14 2017

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 0000 UTC surface analysis and satellite imagery through 
0200 UTC.

...SPECIAL FEATURE...

GULF OF TEHUANTEPEC GALE WARNING...

North winds in the Gulf of Tehuantepec will quickly increase to 
a strong breeze tonight, becoming minimal gale force by sunrise 
Tuesday, with seas building to 11 ft near 15N95W. Gale force 
winds will further increase to near 40 kt Tuesday evening with 
max seas of 15-16 ft by Tuesday night. The winds may briefly 
diminish below gale force Wed afternoon, but increase again to 
30 to 35 kt Wednesday evening, and persist into the weekend with 
peak winds expected during late night and early morning hours. 
NE swell generated by this gap high wind event will propagate 
southwest and mix with long-period SW swell from the southern 
hemisphere, resulting in combined seas of 8 ft or greater 
reaching 09N between 95W and 103W.

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

A weak ITCZ extends from 05N117W to 01N133W. Scattered moderate 
convection is within 30 nm either side of the axis between 123W 
and 128W. 

...DISCUSSION...   

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A weak surface ridge is west of Baja California. Gentle NW flow 
is expected through Wednesday morning west of 98W including the 
Gulf of California. The Gulf of Tehuantepec wind event described 
above will dominate the offshore marine weather between 93W and 
98W for the next several days. 

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

Light to gentle winds and combined seas of 3-5 ft are expected 
to continue through Wednesday. Fresh drainage winds will bump up 
the winds in the Gulf of Papagayo Wednesday morning, and model 
guidance indicates a strong diurnal pulsing of local winds will 
prevail in the usual favored gap wind areas Thursday through 
Saturday. Swell generated by the gap winds will spread west-
southwest and merge with seas associated with the Gulf of 
Tehuantepec to dreate a large area of 7-9 ft seas north of 07N 
and east of 100W by Friday.

REMAINDER OF THE AREA...

A nearly stationary surface high centered near 33N131W will 
weaken and shift southward Wednesday as a cold front pushes into 
the far NW waters. The front will weaken Wednesday night and 
Thursday morning then lift north of the area Thursday afternoon. 
Moderate to fresh trades will persist south of the high and west 
of 115W through Friday. A strong cold front reaching 30N140w on 
Friday will extend from 30N133W to 23N140w on Saturday.  

$$ 
Mundell