000
AXPZ20 KNHC 021544
TWDEP

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1605 UTC Wed Dec 2 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
1500 UTC.

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

The monsoon trough extends from a 1009 mb low pressure over
northern Colombia to 06N95W to a 1011 mb low pressure near
09N105W to 11N115W to 09N123W. The ITCZ continues from 09N123W 
to beyond 08N140W. Scattered moderate convection is north of 05N
to 08N between 78W and 84W, from 07N to 11N between 102W and 
106W, from 08N to 11N between 110W and 113W, and within about 120
nm N of the ITCZ axis between 133W and 137W.

OFFSHORE WATERS WITHIN 250 NM OF MEXICO... 

Gentle to moderate NW winds prevail west of Baja California Norte
with seas to 8 ft in long period NW swell north of Punta Eugenia.
Light to gentle winds will prevail elsewhere west of the Baja 
peninsula through early Thu. Fresh to locally strong winds will 
funnel through the Baja California Norte passes into the offshore
waters Thu through Fri morning as strong high pressure builds 
over the Great Basin region. Strong northerly winds and high seas
to 10 ft are expected in the northern Gulf of California on Thu.
Fresh NW winds will prevail across most of the gulf through Sat.

Gulf of Tehuantepec: High pressure building behind a cold front 
in the western Gulf of Mexico on Thu will induce strong northerly
gap winds across the Tehuantepec region. Winds are forecast to
reach gale force in the Tehuantepec region Sat night through Sun
night, with seas building to 12 or 13 ft. 

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

Fresh to strong NE to E winds are expected in the Gulf of 
Papagayo over the next couple of days but mainly during the
overnight and early morning hours. Light to gentle winds are 
expected elsewhere north of the monsoon trough, with moderate to 
fresh S to SW winds south of the trough axis, through the 
upcoming weekend. 

REMAINDER OF THE AREA...

High pressure of 1024 mb located near 32N131W continues to 
dominate the northern forecast waters. The pressure gradient 
between the ridge and lower pressures within the monsoon trough 
is supporting moderate to fresh NE to E trade winds, generally 
north of 10N and west of 120W. Seas are 6 to 8 ft across this 
area.

Long period NW swell will begin to propagate across the NW waters
later today, building seas to 12 to 15 ft NW of a line from 
30N131W to 18N140W by Thu morning. Sea heights of 8 to 12 ft 
will dominate most of the forecast region N of 10N W of 115W, and
S of 10N W of 125W by Fri morning.

$$
GR