000
AXPZ20 KNHC 101600
TWDEP

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1605 UTC Thu Dec 10 2020

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 1200 UTC surface analysis and satellite imagery through
1520 UTC.

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

The monsoon trough extends from 08N78W to 07N87W to 05N95W to
09N110W to 1012 mb low pressure near 09N116W to 07N122W. The 
ITCZ continues from 07N122W to beyond 08N140W. Scattered 
moderate to isolated strong convection is noted from 02N to 07N 
between 78W and 82W, and from 06N to 12N between 104W and 125W.

OFFSHORE WATERS WITHIN 250 NM OF MEXICO... 

Winds and seas will continue to decrease today in the Gulf of
Tehuantepec. By tonight, winds will diminish to 20 kt or less, 
and seas will subside below 8 ft. For tonight and Friday, winds
offshore the coast of SW and west-central Mexico will be gentle.
However, expect moderate N winds to the west of Baja California.

NW swell prevails across the open waters off Mexico. Seas greater
than 8 ft will prevail over much of these waters through 
tonight. The swell will slowly subside, and fall below 8 ft over 
much of these waters by late Fri. A new round of NW swell with 
wave heights of 8-9 ft will affect the waters off Baja California
Norte this weekend. A more significant push of NW swell is 
likely west of Baja California early next week.

A surface trough extends over Baja California along 115/116W from
18N to 30N. Scattered moderate convection is from 17N-22N 
between 106W-114W. High pressure will build in the wake of the 
trough, supporting fresh northerly winds across the Gulf of 
California late Sat through late Sun.

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

Gulf of Papagayo: Fresh to strong offshore gap winds will 
prevail through early Fri as high pressure prevails over the 
western Caribbean. Seas are near 10 ft today, with seas greater 
than 8 ft extending well downwind of the Papagayo region. Seas
will subside to below 8 ft later on Fri.

Elsewhere, gentle to moderate S to SW winds will prevail south 
of the monsoon trough through the next several days where seas 
in the 4-6 ft range will prevail.

REMAINDER OF THE AREA...

The pressure gradient between high pressure north of the area
and lower pressure in the vicinity of the ITCZ, and within the 
monsoon trough, is supporting an area of fresh trade winds 
roughly from 08N to 23N west of 122W. High pressure will build 
across the northern waters, with moderate to fresh winds 
prevailing from 10N to 20N west of 120W the next several days. 

Long period NW swell covers much of the waters, with seas in 
excess of 8 ft. Seas will slowly subside, and fall below 8 ft 
over much of the area by early Sat. Looking ahead, a new round of
northerly swell of 8 to 10 ft will push south into the waters 
north of 23N late Sun into Mon.

$$
Hagen