000
AXPZ20 KNHC 130242
TWDEP 

Tropical Weather Discussion 
NWS National Hurricane Center Miami FL
0405 UTC Mon Mar 13 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.

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

A surface trough extends SW from Panama from 06N85W to 02N94W. 
Scattered moderate convection is within 75 nm northwest of the 
trough axis. A weak ITCZ extends from 04N116W to 03N140W, with 
no convection.

...SPECIAL FEATURE...

GULF OF TEHUANTEPEC GALE WARNING...

Another gap wind event for the Gulf of Tehuantepec will begin 
early Monday with fresh to strong northerly winds expected near 
sunrise. Winds will diminish during the day, then re-intensify 
Monday evening and continue into Tuesday. High pressure building 
southward in the Gulf of Mexico behind a cold front will induce 
strong northerly winds through the Chivela Pass Tuesday, with 
model guidance indicating gale conditions in about 48 hours 
around 00 UTC Tuesday night continuing through Thursday morning. 
Nocturnal northerly winds will remain strong in the Gulf of 
Tehuantepec during late night and early morning hours through 
the weekend from high pressure across the NE Gulf of Mexico.

...DISCUSSION...   

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A surface ridge will extend from NW-SE west of Baja California 
the next few days. Moderate NW flow will diminish to a light to 
gentle breeze across most of the area overnight.

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

Moderate to locally fresh nocturnal NE flow is expected downwind 
of the gulfs of Papagayo and Panama overnight. Fresh to strong 
drainage winds are expected again Tuesday and Wednesday nights. 
Light to gentle winds and combined seas of 4-5 ft are expected 
elsewhere through Tuesday.  

REMAINDER OF THE AREA...

A nearly stationary subtropical high will remain near 32N131W 
through Tuesday. Fresh to locally strong NE trades will persist 
across the tropics from 04N to 12N west of 128W for the next 24 
hours. Combined seas will be 6-8 ft in mixed swell across the 
area through Monday. Fresh SW winds and building seas to 9 ft 
will develop across the waters north of 30N west of 136W Tuesday 
ahead of a cold front reaching 30N140W Tuesday night. The front 
will stall on Wednesday, then drift back north of 32N Thursday.  

$$ 
Mundell