474 
AXPZ20 KNHC 201507
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1605 UTC Sun Apr 20 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
1505 UTC.

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

The monsoon trough extends from southern Costa Rica near 09N84W
to 06N108W. The ITCZ stretches from 06N108W to 04N125W and beyond
02N140W. A second ITCZ extends from 03S121W to 05S140W. Scattered
moderate to isolated strong convection is observed from 01N to
10N and east of 95W. Scattered moderate convection is present
from 02N to 09N and between 97W and 129W.

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

A weak high pressure pattern dominates the offshore waters of
Mexico, supporting gentle to moderate northerly winds and
moderate seas across the offshore waters of Baja California.
Mainly moderate northerly winds and moderate seas are noted in
the central and southern Gulf of California, while light to
gentle winds and slight seas prevail in the rest of the basin.

Moderate to locally fresh NW-N winds and moderate seas are
evident off Jalisco and Colima. Elsewhere, moderate or weaker
winds and slight to moderate seas are prevalent, including in the
Gulf of Tehuantepec.

For the forecast, fresh to occasionally strong NW winds will 
pulse offshore of southwestern Mexico near Jalisco each night and
morning through at least Tue. Farther north, moderate to locally
fresh NW winds are expected to pulse in the Gulf of California 
and in the bays offshore of Baja California through tonight. 
Otherwise, prevailing high pressure over the eastern Pacific will
support gentle to moderate NW winds and slight to moderate seas 
over the remainder of the waters through the middle of this week.

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

Strong showers and isolated thunderstorms continue to affect the
offshore waters of Colombia, Panama and Costa Rica. Gusty winds 
and suddenly higher seas are possible near the strongest
convection. Elsewhere, a strong ridge north of the area supports
fresh to strong easterly trade winds across the Gulf of Papagayo
region, spreading downstream to 91W. Seas in these waters are 5-7
ft. Gentle to moderate northerly winds are found in the Gulf of
Panama, along with seas of 3-5 ft. In the remainder of the basin,
moderate or weaker winds and moderate seas are prevalent.

For the forecast, fresh to strong E winds and locally rough seas
are expected to pulse in the Gulf of Papagayo through Tue 
morning, and occasional moderate to fresh winds are expected in 
the region thereafter. Moderate to locally fresh winds will 
extend through the far offshore waters of El Salvador and 
Guatemala early this week. Elsewhere, winds will pulse to 
moderate speeds in the Gulf of Panama this morning, decreasing to
light to gentle speeds through midweek. Looking ahead, a long- 
period Southern Hemisphere swell will support rough seas in the 
waters offshore of Ecuador by late week. 

...REMAINDER OF THE AREA....

A broad subtropical ridge over the North Pacific extends into 
the waters of the tropical eastern Pacific. Moderate to fresh 
easterly trade winds and seas of 6-9 ft are noted from the ITCZ 
to 20N and west of 120W. A recent altimeter satellite pass
confirmed seas peaking near 9 ft in the area described. Moderate
or weaker winds and moderate seas are prevalent elsewhere. 

For the forecast, moderate to fresh winds will occur through the
middle of this week from 05N to 20N west of 115W, as ridging 
continues to dominate the eastern Pacific. Short-period, wind- 
generated E swell will promote rough seas in this region. Farther
north, gentle to moderate N to E winds and moderate seas will 
prevail. N swell to 8 ft will approach the northern waters 
tonight through midweek before retreating. Looking ahead, a long-
period Southern Hemisphere swell will promote rough seas south 
of 05N late this week.

$$
Delgado