000
AXPZ20 KNHC 262115
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
2205 UTC Mon Dec 26 2016

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 1800 UTC surface analysis and satellite imagery through
2100 UTC.

...SPECIAL FEATURES...

Gulf of Tehuantepec Gale Warning...High pressure building north
of the area in the SW Gulf of Mexico will tighten the gradient
across the Isthmus of Tehuantepec, and strong winds will funnel
through the Chivela pass into the Gulf of Tehuantepec. Gap winds
will strengthen to 25 kt tonight and increase to minimal gale
force Tuesday. Pulsing gales are expected to continue through
Friday night. This persistent high wind event will create a
plume of 8 to 12 ft seas extending several hundred miles from
shore. Please see the latest National Hurricane Center high seas
forecast under headers MIAHSFEP2/FZPN03 KNHC for further details.

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

The monsoon trough extends from 08N83W to 06N95W. The ITCZ axis
continues from 06N95W to 07N117W to 05N134W to 06N140W. No large
areas of significant convection are noted.

...DISCUSSION...   

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Please see special features for more on the Gulf of Tehuantepec
gale force wind event. Elsewhere fresh to strong northwest winds
will develop in the Gulf of California tonight, then continue
through much of the week. Northwesterly swell off the coast of
Baja California will subside below 8 ft this evening. A low
pressure system and trailing cold front west of Baja California
will stall and gradually dissipate tonight through Wednesday.
  
OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND
WITHIN 750 NM OF ECUADOR...

Fresh to strong gap winds will develop in the Gulf of Papagayo
this evening as high pressure builds north of the area and
tightens the pressure gradient over Central America. Elsewhere,
winds will remain 20 kt or less, with seas below 8 ft through
early next week.

REMAINDER OF THE AREA...

A cold front extends from a 1015 mb low centered near 31N124W to
30N122W to 26N126W to 25N140W. Strong winds are found both ahead
of and north of the cold front. This front will usher in a fresh
set of northwesterly swell with seas of 8 to 12 ft propagating
into the area. The low pressure will drift south of 30N tonight,
then stall and weaken into a trough near 28N122W late Tuesday.
High pressure building behind the front will support fresh to
strong trade winds north of the ITCZ to 20N, and west of 125W
through Thursday morning.

$$
Mundell