302 
AXPZ20 KNHC 130841
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1005 UTC Thu Aug 13 2026

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
0830 UTC.

...SPECIAL FEATURES...

Newly named Tropical Storm Hernan is centered near 18.1N 131.9W 
at 13/0900 UTC, moving west at 2 kt. Estimated minimum central 
pressure is 1006 mb. Maximum sustained wind speed is 35 kt with 
gusts to 45 kt. Hernan is expected to diminish thereafter as 
drier air moves into the area, and may become a remnant low 
through Fri. Maximum seas are reaching 11 ft within 60 nm of the
center in the northwest quadrant, and may peak to 12 ft Thu. 
Scattered moderate convection is active within 60 nm of the 
center of Hernan.

Please read the latest High Seas Forecast issued by the National
Hurricane Center at website - 
https://www.nhc.noaa.gov/text/MIAHSFEP2.shtml and the latest 
Eight-E NHC Forecast/Advisory and Public Advisory at 
www.hurricanes.gov for more details.

...TROPICAL WAVES...

The axis of a tropical wave is near 92W north of 02N, moving 
west at 10 to 15 kt. Nearby convection is discussed in the 
ITCZ/monsoon trough section below.

The axis of a tropical wave is near 123W/124W from 02N to 18N, 
moving westward at 10 to 15 kt. Nearby convection is discussed in
the ITCZ/monsoon trough section below.

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

The monsoon trough extends from 09N78W to 07N95W to 08N110W. The
ITCZ extends from 08N110W to 09N120W. Scattered moderate to 
isolated strong convection is from 05N to 13N between 85W and 
105W. 

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

Moderate to fresh winds prevail over the Gulf of Tehuantepec. 
Gentle to moderate winds are found elsewhere. Moderate seas are 
over the open waters off Mexico, with slight to moderate seas 
over the Gulf of California.

For the forecast, fresh to strong gap winds are expected across 
the Gulf of Tehuantepec through early next week. The pressure 
gradient between high pressure west of the area and lower 
pressures over northern Mexico will support moderate to locally 
fresh southerly winds across the northern Gulf of California 
tonight into Thu, then again on Thu night. A moderate pressure 
gradient will promote mostly gentle to moderate winds across the 
remainder offshore waters of Mexico along with moderate seas.

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

Fresh to strong E gap winds and moderate seas persist across and
downstream the Gulf of Papagayo. Gentle to moderate winds and 
moderate seas in SW swell prevail elsewhere. 

For the forecast, moderate to fresh NE to E gap winds and 
occasionally rough seas will pulse across the Papagayo region. 
Gentle to moderate winds will prevail between the Galapagos 
Islands and Ecuador, with large southerly swell moving into the 
region starting Thu night. Light to gentle winds and moderate 
seas in SW swell are expected elsewhere.

...REMAINDER OF THE AREA...

Please see Special Features section above for more on newly 
named Tropical Storm Hernan. 

Broad ridging dominates the waters north of 20N. Outside of the
area impacted by Hernan, the pattern is supporting fresh to 
locally strong winds, and rough seas, from 15N to 22N between 
130W and 140W. Rough seas in southerly swell cover the waters S 
of 05N between 105W and 130W. Gentle to moderate winds, and 
moderate seas prevail elsewhere.

For the forecast, please see Special Features section above for
more on Hernan. Elsewhere, the southerly swell will maintain 
rough seas over the discussion waters S of 05N between 95W and 
130W through the end of the week.

$$
Christensen