601
AXPZ20 KNHC 021005
TWDEP

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1005 UTC Tue Dec 2 2025

Tropical Weather Discussion for the eastern Pacific Ocean from
03.4S to 30N, east of 120W including the Gulf of California, and
from the Equator to 30N, between 120W and 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
0800 UTC.

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

A monsoon trough extends westward from the coastal border of
Costa Rica and Panama to 07N107W. An ITCZ runs northwestward
from 07N107W to 12N117W, then resumes westward from 08N128W to
beyond 08N140W. Scattered moderate convection is seen up to 120
nm along either side of the monsoon trough between 100W and the
coastal border of Costa Rica and Panama. Scattered showers are
occurring near and up to 125 nm north of the second ITCZ
segment.

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

Convergent SE winds are causing widely scattered showers near the
Revillagigedo Islands. Convergent northeasterly winds are
generating scattered moderate convection  A broad surface ridge
extends southeastward from a 1028 mb high west of California
across 30N130W to near the Revillagigedo Islands. Moderate to
fresh N winds and seas of 3 to 5 ft are present at the northern
Gulf of California. Gentle to moderate NW to N winds and 2 to 4
ft seas are seen across the rest of the Gulf of California.
Gentle northerly winds and seas at 4 to 6 ft in moderate NW swell
exist west of Baja California. Gentle to moderate N to ENE winds
and 4 to 6 ft seas are present near the Revillagigedo Islands
and offshore of Cabo Corrientes. Moderate to fresh N winds with 4
to 6 ft seas are noted near the Gulf of Tehuantepec. Light to
gentle winds and seas at 2 to 4 ft prevail for the rest of the
southern Mexico offshore waters.

For the forecast, fresh N winds in the Gulf of Tehuantepec will
pulse to strong tonight, then subside to gentle by Wed afternoon.
A surface trough just southwest of the Revillagigedo Islands
will keep showers and thunderstorms near the islands through at
least Wed. Moderate to fresh N winds will pulse in the northern
Gulf of California into Fri morning.

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

Aided by an upper-level trough in the vicinity, convergent SW
winds are producing scattered moderate convection in the Gulf of
Panama. Refer to the Monsoon Trough/ITCZ section for additional
convection in the region. Surface ridging extending across the
northern Caribbean Sea supports fresh NE winds and 4 to 6 ft seas
in the Gulf of Papagayo. Offshore of Colombia and well southwest
of Costa Rica and Panama, gentle to moderate S to SW winds and 4
to 6 ft seas exist. South of the monsoon trough and between
Ecuador and the Galapagos Islands, gentle to moderate S to SW
winds and seas at 3 to 5 ft are evident. Elsewhere, light to
gentle winds with 3 to 5 ft seas in light to moderate swells
prevail.

For the forecast, moderate to fresh gap winds will persist near
the Papagayo region through Thursday. Moderate or lighter winds
and moderate seas are expected elsewhere into the weekend.

...REMAINDER OF THE AREA...

A weakening frontal low pressure of 1016 mb is near 24N138W with
a dissipating cold front curving southwestward from this low to
20N137W to 22N146W. A surface trough is seen farther southeast
near 12N120W with scattered moderate convection from 15N to 19N
between 114W and 119W, and from 06N to 09N between 115W and 120W.
Refer to the Monsoon Trough/ITCZ section for additional
convection in the region.

A broad surface ridge extends southeastward from a 1028 mb high
west of California across 30N130W to near the Revillagigedo
Islands is supporting fresh with locally strong E winds with 9
to 11 ft seas north of 22N and west of 135W. There is a zone of
moderate to fresh NE to E winds and seas of 5 to 7 ft from 14N
to 20N between 115W and 125W. Otherwise, gentle to moderate NNE
to E winds and 4 to 6 ft seas are present north of 10N. The rest
of the tropical eastern Pacific is under the influence of modest
ridging, leaving winds mainly gentle, and seas moderate.

For the forecast, the low pressure and associated front will
dissipate tonight. Large NW swell will continue to spread
southeastward across the northwestern subtropical and tropical
waters while weakening through Wed. Rough seas will reach east
to 120W and south to 09N today and tonight, before decaying into
late week.

$$

Chan