000
AXPZ20 KNHC 271005
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1005 UTC Tue Dec 27 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 0600 UTC surface analysis and satellite imagery through
0900 UTC.

...SPECIAL FEATURES...

Gulf of Tehuantepec Gale Warning...High pressure building north
of the area in the Gulf of Mexico tightens the gradient over the
Isthmus of Tehuantepec, thus supporting strong to near gale
winds funneling through the Chivela pass into the Gulf of
Tehuantepec. Gap winds will strengthen tonight to minimal gale
force. Pulsing 30-40 kt 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 latest National Hurricane Center high seas
forecast MIAHSFEP2/FZPN03 KNHC for further details.

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

The monsoon trough extends from 09N83W to 07N90W to 07N106W. The
ITCZ axis begins near 09N116W and continues to 06N140W. No
significant convection is noted.

...DISCUSSION...   

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Please see special features for more on the Gulf of Tehuantepec
gale force wind event. Fresh to strong northwest winds are in
the Gulf of California, which will continue to pulse through
Friday. Northwesterly swell off the coast of Baja California
will subside to 6-7 ft this afternoon. A low pressure system and
a trailing cold front west of Baja California will weaken and
gradually dissipate through late tonight.
  
OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND
WITHIN 750 NM OF ECUADOR...

Fresh to strong gap winds are in the Gulf of Papagayo as high
pressure builds north of the area and tightens the pressure
gradient over Central America. Winds will decrease this
afternoon, but will pulse again tonight through Wednesday
morning. Elsewhere, winds will remain 20 kt or less, with seas
below 8 ft through early next week.

REMAINDER OF THE AREA...

A cold front is associated with a 1016 mb low centered near
29N123W. The front extends from 30N120W to 24N125W to 24N140W.
Scatterometer data shows fresh to strong northerly winds north
of the front. Northwest swell with seas of 8 to 12 ft associated
with the front is propagating into the area. The low will
continue to drift south and gradually weaken into a trough along
125W Wednesday morning. High pressure building behind the front
will support fresh to strong trade winds north of the ITCZ to
20N, and west of 137W through Wednesday night.

$$
Ramos