000
AXPZ20 KNHC 242040
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
2008 UTC Wed Jan 24 2018

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: A strong pressure gradient in 
southern Mexico associated high pressure north of a stationary 
front in the Gulf of Mexico will produce a continuous period of 
sustained gale force winds over the Gulf through Fri evening. 
Winds should peak Thu with maximum seas of 17 ft. Propagating N 
to NE swell will cause seas to build to 8 ft well away from its 
source region through Fri. Strong winds over the Gulf should 
diminish briefly Sat evening as high pres shifts E into the 
western Atlc. Another gale is possible Sunday evening as a strong
cold front crosses the western Gulf of Mexico. Please refer to 
the East Pacific High Seas Forecast under AWIPS/WMO headers 
HSFEP2/FZPN03 KNHC for more details. 

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

A surface trough extends from 08N78W to 05N90W to 05N101W. The 
ITCZ continues from 05N101W to 07N120W to 07N140W. Scattered 
moderate convection is within 60 NM either side of the ITCZ axis
between 110W and 134W.

...DISCUSSION...
 
OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Gulf of Tehuantepec: Please refer to the special features section
above. 

Gulf of California: Fresh to strong winds expected across the 
Gulf this morning will diminish this evening as high pres north 
of the area weakens. Winds will increase once again this weekend 
as high pressure builds northwest of the region. 

Decaying NW swell are maintaining 8 ft seas off the coast of 
Baja California. The area of high seas will slowly recede today. 
A fresh set of NW swell will propagate into the waters off the 
coast of Baja California Norte Fri evening. Seas associated with
this swell will peak near 10 ft. 

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

Nocturnal winds will pulse to strong each night in the Gulf of 
Papagayo through Sat night as high pres ridges SE from the Gulf 
of Mexico over the NW Caribbean. Elsewhere N of 09N, light to 
gentle offshore flow will prevail, and gentle southerly winds 
will dominate the area S of 09N for the next few days. 

REMAINDER OF THE AREA...

The gradient between high pressure centered near 28N132W and 
lower pressure in the vicinity of the ITCZ is supporting fresh to
occasionally strong trade winds from 09N-15N west of 125W, with 
peak seas of 11 ft. Large seas will continue within the region of
strongest trade winds in mixed long period NW swell and short 
period NE wind waves. Seas 8 ft or greater cover nearly all the 
the open waters N of 05N and west of 106W. The area of fresh to 
strong trades and high seas north of the ITCZ will erode westward
today as the high near 28N weakens with a cold front over NW 
waters near 30N136W. High pressure building behind the cold 
front will once again increase the coverage of the fresh to 
strong trades Thu through Fri night.
   
$$
Formosa