000
AXPZ20 KNHC 162206
TWDEP

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
2205 UTC Fri Apr 16 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 1800 UTC surface analysis and satellite imagery through
2130 UTC.

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

The monsoon trough extends from 10N84W to 07N114W. Today marks 
the reintroduction of the monsoon trough to the surface analysis,
due to the persistent SW winds equatorward of the trough line. 
The ITCZ continues from 07N114W to 07N127W, then continues west 
of a surface trough from 06N133W to beyond 05N140W. A surface 
trough is analyzed within the ITCZ and extends from 09N128W to 
04N131W. Scattered moderate, isolated strong convection is from 
04N to 10N east of 87W and from 05N to 10N between 96W and 117W.

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A weak 1023 mb high centered 29N130W is contributing moderate to
fresh NW winds west of Baja California through Sun morning 
before the winds further diminish through at least Wed night. A 
moderate to strong gap wind event over the Gulf of Tehuantepec 
may occur starting on Wed. Seas over the Gulf of Tehuantepec
should remain 5 to 6 ft through Tue night, then increase to 6 to
8 ft Wed. Seas elsewhere will generally remain 4 to 6 ft over 
the offshore waters and less than 3 ft over the Gulf of 
California. No significant long-period swell is expected over the
Mexican offshores through at least Wed night. 

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

Winds should remain moderate or weaker across the Central 
American and equatorial waters for the next several days. Seas
should generally remain 5 to 7 ft. An enhanced long-period SW 
swell may enter the equatorial waters beginning on Tue, pushing
the seas to 8 to 9 ft. The reintroduction of the monsoon trough is
responsible for the widespread shower activity and strong 
thunderstorms possible east of 95W through Sun. 

REMAINDER OF THE AREA...

A weak pressure gradient between the 1023 mb high near 28N130W 
and lower pressures over the ITCZ/monsoon trough is contributing 
toward light to moderate and locally fresh NE trades. Seas are 
currently 5 to 7 ft across the High Seas waters. As the high 
builds on Sun through Tue, the NE trades will increase to fresh 
to strong and and seas rise to 8 to 9 ft west of 130W. An 
enhanced SW swell may enter the equatorial waters beginning on 
Tue, pushing the seas to 8 to 9 ft. At the same time an enhanced 
NW swell may enter the northernmost waters west of the Baja 
California waters, likewise boosting seas to 8 to 9 ft.

$$
Landsea