640
AXPZ20 KNHC 080323
TWDEP

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
0405 UTC Mon Sep 8 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 0000 UTC surface analysis and satellite imagery through
0305 UTC.

...TROPICAL WAVES...

A tropical wave extends from 07N to 17N with axis near 114W,
moving westward at 5-10 kt. Scattered moderate convection is
observed from 09N to 20N and between 110W and 120W.

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

The monsoon trough extends from southern Costa Rica near 09N84W
to 15N112W to 09N129W and to 15N138W. Scattered moderate
convection from 05N to 16N and east of 110W and also from 07N to
13N and between 120W and 127W.

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

Scattered showers and isolated thunderstorms continue to affect the
Gulf of Tehuantepec and SW Mexico waters. Mariners navigating these
waters can expect gusty winds and higher seas. The remainder of the
basin is under a weak high pressure system centered near 32N137W and
extending southeastward to the Revillagigedo Islands. Moderate NW
winds and slight to moderate seas are occurring in the central and
southern Gulf of California. Elsewhere in the Mexican offshore
waters, including the Gulf of Tehuantepec, light to gentle winds and
slight to moderate seas prevail.

For the forecast, fresh to locally strong NW winds are forecast
to develop offshore Baja California Mon evening into late this
week as the remnants of a frontal boundary approach from the
west, slightly increasing the pressure gradient across the
region. Fresh to strong northerly winds are likely to pulse in
Tehuantepec Mon and Tue and then late in the week.

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

A line of strong showers and isolated thunderstorms is moving
across the offshore waters of northern Costa Rica to southern
Guatemala. The line is moving southwestward at 25 to 30 kt. Thus,
mariners in these waters can expect gusty winds near gale-force
and higher seas.

A strong ridge over the southeast Pacific and lower pressures
associated with the monsoon trough result in moderate to locally
fresh southerly winds south of 07N. Seas in these waters are 4-7
ft. Elsewhere, light to gentle winds and slight to moderate seas
are prevalent.

For the forecast, scattered showers and isolated thunderstorms
will continue to affect the offshore waters of Central America
and Colombia during the next several days. A moderate pressure
gradient south of the monsoon trough will support moderate to
fresh southerly winds and moderate seas in S to SW swell through
late this week.

...REMAINDER OF THE AREA...

Hurricane Kiko is weakening well west of the tropical eastern
Pacific, but continues to produce moderate to locally fresh easterly
winds and seas of 6-8 ft from 12N to 25N and west of 130W. For
more details on this hurricane, please visit hurricanes.gov.

The remainder of the basin is under the influence of a 1021 mb
high pressure system positioned near 32N127W. Moderate N-NE
winds and moderate seas are present across much of the waters
north of the monsoon trough and between 115W and 130W. Moderate
to fresh southerly winds and moderate to rough seas are found south
of the monsoon trough. Elsewhere, light to gentle winds and moderate
seas are evident.

For the forecast, conditions will continue to improve across the
western tropical waters tonight and Mon as Kiko moves further west
of the area. Moderate to fresh N-NE winds are forecast N of the
monsoon and W of 110W through Wed night. Otherwise, the tropical
wave currently near 114W will continue moving W through the forecast
period, enhancing winds to fresh speeds near the monsoon and
supporting rough seas. A cold front will enter the northern waters
Mon and slide southeastward over the next few days as it weakens.
However, no increase in winds or seas is expected due to the front.

$$
Delgado