876 
AXPZ20 KNHC 131418
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1605 UTC Sun Apr 13 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
1400 UTC.

...SPECIAL FEATURES...

Gulf of Tehuantepec Gale Warning: Minimal gale-force northerly 
gap winds prevail across the Gulf of Tehuantepec N of 14.5N,
where peak seas in this area are around 12 ft. Strong to near
gale force N to NE winds are elsewhere over the Tehuantepec
region extending SW to near 12N97W, with seas in the 8 to 11 ft
range. The gale- force winds will diminish this morning. N to NE
swell generated by this ongoing gap wind event is merging with 
cross equatorial S swell dominating the regional waters, and is 
producing a large area of seas 8 ft and greater that extends 
southwestward to near 06N106W. Seas will gradually subside 
through Mon over this area.

Please refer to the the latest High Seas Forecast issued by the 
National Hurricane Center at website:
https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml for more details.

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

A surface trough extends from 08N81W to 02.5N93W. The ITCZ 
continues from 02.5N93W to 04N121W to beyond 02N140W. Scattered 
moderate and isolated strong convection is noted from 03N to 06N 
E of 80W. Scattered moderate convection is noted from 03N to 07N 
between 104W and 125W. 
 
...OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Please see the Special Features section for information on a gale
warning in effect for the Gulf of Tehuantepec.

Aside from conditions in the Tehuantepec region discussed above,
a 1031 mb high pressure centered well NW of the area near 
37.5N138W extends a ridge southeastward SE across the outer Baja
California waters and just W of the Revillagigedo Islands. The 
pressure gradient between this area of high pressure and lower 
pressure over Mexico is supporting moderate winds off Baja 
California Norte ad well as supporting moderate gap winds into 
the northern Gulf of California. Light to gentle winds prevail 
elsewhere. Seas are in the 7-10 ft range in NW swell off Baja 
California Norte. Elsewhere over the open waters, seas of 6-7 ft 
prevail. In the Gulf of California, seas are 3 ft or less. 

For the forecast, gale-force northerly gap winds across the Gulf of
Tehuantepec will diminish to fresh to strong through early Mon 
afternoon. Large NW swell will build across the Baja California 
waters through Mon, subsiding afterward. Winds across the area 
waters will remain moderate or less through Thu as high pressure 
remains well NW of the area. The exception to this will be N of 
29N in the Gulf of California, where a surface trough will 
persist, supporting fresh to locally strong SW to W winds each 
night. Northerly gap winds will return Mon night through Wed 
night across the Tehuantepec region, pulsing to strong at night. 
Winds there may briefly reach gale-force Tue night into Wed 
morning. 

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

Fresh to strong NE to E gap winds, and seas of 6 to 9 ft, 
prevail across the Papagayo region and extend downstream to near
91W. Fresh N winds are across the Gulf of Panama N of 04N, where
seas are 5 to 7 ft in S swell. Winds are light to gentle 
elsewhere, with seas of 5 to 8 ft in moderate S to SW swell. 

For the forecast, high pressure N of the region will maintain 
fresh NE to E gap winds pulsing to strong at night across the 
Papagayo region, with locally rough seas. Moderate to fresh N 
winds will pulse to strong at night through Sun night in the Gulf
of Panama. Large N swell from Gulf of Tehuantepec gales will 
propagate into the waters offshore Guatemala through the weekend.
Moderate S swell impacting the regional waters will subside this
afternoon through Mon. 

...REMAINDER OF THE AREA....

A broad surface ridge covers the subtropical Pacific waters,
anchored on a 1031 mb high near 37.5N138W. The pressure gradient
between this area of high pressure and lower pressure in the 
vicinity of the ITCZ is supporting moderate to fresh winds over 
much of the waters N of the ITCZ and W of 120W. Seas over these 
waters are in the 7 to 10 ft in merging NW and S swell. 
Elsewhere, winds are moderate or weaker. E of 110W, seas are 7 to
10 ft in S swell mixing with NE swell propagating away from 
Tehuantepec. 

For the forecast, N to NE swell generated from the Gulf of
Tehuantepec gale force gap wind event will mix with S swell
E of 115W though Sun night. High pressure will prevail N of the 
area and W of 130W through mid week, maintaining fresh to 
locally strong NE winds W of 130W through Wed. Large NW to N 
swell over the NW subtropical waters will spread southeastward 
through Mon before subsiding.

$$
AL