000
AXPZ20 KNHC 181606
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1605 UTC Sun May 18 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 1200 UTC surface analysis and satellite imagery through
1550 UTC.

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

The monsoon trough extends westward from central Costa Rica near
09N85W to 09N110W to 08N125W. The ITCZ continues west- 
southwestward to beyond 05N140W. Scattered moderate convection 
is occurring from 06N to 08N between 77W and 85W, from 08N to 15N
between 86W and 95W, and from 05N to 11N between 92W and 122W.

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

A broad surface ridge extends southeastward from a 1031 mb high 
near 35N141W to just southeast of the Revillagigedo Islands. 
This feature is supporting moderate to fresh NW winds and seas of
5 to 7 ft west of Baja California and near the Revillagigedo 
Islands. A surface trough extending southward from southern 
California is causing moderate to locally WNW winds and seas to 4
ft along the Gulf of California. Light to gentle winds and seas 
of 4 to 6 ft in mixed SW and NW swell prevail across the 
southern Mexico offshore waters.

For the forecast, the ridge will continue to support moderate to
fresh NW to N winds with moderate to locally rough seas in large
NW swell west of Baja California through Mon, roughest seas 
anticipated north of Punta Eugenia. Afterward, gentle to moderate
NW to N winds with gradual subsiding seas should prevail through
Thu. Mostly gentle winds and slight to moderate seas, primarily 
in SW swell are expected elsewhere through Thu.

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

Abundant moisture is coupling with convergent surface winds to 
trigger scattered showers and thunderstorms across the offshore 
waters of El Salvador, Nicaragua, Guatemala, and offshore
Colombia. Otherwise, mostly light to gentle winds and seas of 4 
to 6 ft in SW swell are ongoing in the Central America offshore 
waters. For the waters between Ecuador and the Galapagos Islands,
gentle to moderate SE winds with 3 to 6 ft seas in SW swell are
present.

For the forecast, periods of showers and thunderstorms will 
continue across the offshore waters of Nicaragua, Costa Rica, 
Panama and Colombia through at least Mon morning. Otherwise, 
light to gentle winds are forecast across the Central America 
offshore waters through Thu night. For waters between the coast 
of Ecuador and the Galapagos Islands, gentle to moderate S winds 
along with moderate seas in SW swell will prevail.

...REMAINDER OF THE AREA....

A broad surface ridge extends southward to near 12N from a 1031 
mb high near 35N141W. Moderate to locally fresh N to ENE winds 
and 5 to 7 ft seas in northerly swell are north of 25N and west 
of 120W. Tighter gradient between the high and the ITCZ is 
generating moderate to fresh NE winds and seas of 7 to 9 ft S of
25N and west of 128W. East of 128W, gentle to locally moderate 
winds and 5 to 6 ft seas are seen from the monsoon trough 
northward. South of the ITCZ/monsoon trough, gentle to moderate 
S to SE winds with seas at 6 to 7 ft prevail west of 94W.

For the forecast, a slight streingthening of the high will cause 
NNE to ENE winds north of 20N and west of 122W to become fresh 
to locally strong, and seas building to 7 to 10 ft from Mon 
afternoon through Tue. Winds and seas from the ITCZ to 20N and 
west of 120W should gradually subside starting Tue night and 
Wed. South of the ITCZ/monsoon trough, a new SW swell is going 
to cause seas to build slightly near midweek.

$$
Ramos