000
AXPZ20 KNHC 200900
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1005 UTC Sat Mar 20 2021

Tropical Weather Discussion for the eastern Pacific Ocean from
the Equator to 32N, east of 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
0900 UTC.

...SPECIAL FEATURES...

Gulf of Tehuantepec Gale Warning: Strong high pressure across
southern Mexico will funnel winds across the Chivela Pass into 
the Gulf of Tehuantepec through Sun. These gap winds will remain
at gale force through Sun morning, peaking at 40-45 kt early this
morning. Maximum seas will peak at 16-18 ft later this morning. 
Please read the latest NWS High Seas Forecast from the National 
Hurricane Center at the website:

www.nhc.noaa.gov/text/MIAHSFEP2.shtml for more details.

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

A trough extends from 08N78W to 03N93W. The ITCZ continues from 
03N93W to 02N120W to 02N140W. Scattered moderate isolated strong
convection is noted from 03N to 05N between 111W and 116W.

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Please see Special Features section above for details on a Gale
Warning for the Gulf of Tehuantepec. 

Scatterometer data shows gentle to moderate winds across most of
the forecast area. Seas are 3 to 5 ft, except downstream from the
gale winds in the Gulf of Tehuantepec. Gales will continue in the
Gulf of Tehuantepec through Sun morning. High pressure building 
N of 30N through Sun night will support fresh to strong NW winds 
west of Baja California Norte Sat through Mon. NW winds will 
increase in the northern Gulf of California on Wed.

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

Scatterometer data shows light to gentle winds across most of the
forecast area. Seas are generally 2 to 4 ft. Fresh to strong NE 
to E winds will pulse across the Papagayo region through Mon 
night, generating seas to 8-9 ft. Fresh N winds are expected in 
the Gulf of Panama tonight through Mon night. Light to gentle 
winds will prevail elsewhere. Large seas from strong winds in the
Gulf of Tehuantepec will spread into the offshore waters of 
Guatemala and El Salvador through Sun. 

REMAINDER OF THE AREA...

A stationary front extends across the northern waters from 
31N123W to 21N138W. Scatterometer data showed moderate to fresh 
NE winds north of the stationary front, and seas are estimated 
to be in the 8 to 11 ft range in the vicinity of the front. An 
area of large NW swell, associated with the front, to 11-13 ft 
covers the NW part of the discussion area. The stationary front 
will weaken and dissipate through early Sun. Strong high pressure
will build north of 30N through Sun night, and support fresh to 
strong NW winds west of Baja California, along with an increase 
in trade winds north of the ITCZ Sun through Tue, with seas 
building to 9 to 12 ft across the western waters through early 
next week.

$$
Mundell