000
AXPZ20 KNHC 080235
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
041 UTC Sun Dec 8 2019

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
0230 UTC.

...SPECIAL FEATURES...

Gulf of Tehuantepec Gale Warning: A cold front extending across 
the W Gulf of Mexico to south of Tampico Mexico will dissipate
tonight. High pressure is currently building S over eastern 
Mexico into the Tehuantepec region. The enhanced N to S pressure 
gradient is supporting minimal gale force N to NE gap winds over 
the Gulf of Tehuantepec, which will continue until Sun. Seas 
of 13 ft will subside Sun as the pressure gradient weakens and 
wind speeds diminish to fresh to strong speeds. Looking ahead, 
another gale force gap wind event could affect the Gulf of 
Tehuantepec Wed evening as a stronger cold front crosses the 
Gulf of Mexico.

See latest NWS High Seas Forecast issued by National Hurricane
Center under AWIPS/WMO headers HSFEP2/FZPN03 KNHC or at website
https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for more details.

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

The monsoon trough extends from 08N78W to 09N84W to 06N94W to
07N100W. The ITCZ continues from 07N100W to 07N125W to 05N140W. 
Isolated moderate convection is present within 180 nm either 
side of the monsoon trough.

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...
Gentle winds prevail across most of the offshore waters, as weak
high pressure resides over the waters W of Baja to around 125W.  

Elsewhere across the Mexican offshore waters, variable and gentle
winds prevail, except for increasing northerly gap winds over 
the Gulf of Tehuantepec. Please see the Special Features section 
above for more details on the Gulf of Tehuantepec Gale Warning.

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

The latest GOES-16 satellite imagery shows isolated moderate 
convection along the monsoon trough from S of the Gulf of 
Tehuantepec to off the coast of Colombia. 

Strong NE to E winds will pulse to around 25 kt each night 
across and downstream of the Gulf of Papagayo through Tue, with 
seas peaking between 8 and 9 ft downstream of the Gulf each 
morning. Elsewhere, gentle to moderate S to SW monsoon flow will 
persist across the offshore waters of Costa Rica, Panama, 
Colombia, and Ecuador during the next several days.

REMAINDER OF THE AREA...

A trough extends from 29N122W to 16N128W. Large NW swell 
associated with an old front is spreading across the region, as 
12 ft seas dominate the NW waters NW. Recent altimeter data 
suggests seas as high as 12 ft near 30N135W. Large NW swell will
continue propagating SE through the weekend. Seas will subside 
Sun and Mon.

Looking ahead, another cold front will approach the NW portion of
the discussion area Mon and introduce new NW swell into the NW 
waters through the middle of next week.

$$
Formosa