000
AXPZ20 KNHC 200326
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
0405 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 0000 UTC surface analysis and satellite imagery through
0300 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, and peak at 40-45 kt tonight.
Maximum seas will build to 16-18 ft tonight and Sat. 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 03N92W. The ITCZ continues from 
03N92W to 02N118W to 02N140W. Scattered moderate convection is 
noted within 60 nm N and 30 nm S of the ITCZ axis between 96W 
and 129W.

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, with winds reaching 40-45 kt, through early
Sun. 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, with building seas. Fresh N winds are expected in the Gulf
of Panama Sat night 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...

Weak high pressure is centered near 29N124W, and a stationary
front extends across the northern waters from 32N124W to 21N138W.
Scatterometer data showed moderate to fresh N to NE winds north
of the stationary front, and seas are estimated to be in the 8 
to 11 ft range in NW swell in the vicinity of the front. An area
of large NW swell, associated with the front, to 12-13 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 western waters through early next week.

$$
Mundell