000
AXPZ20 KNHC 180348
TWDEP

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
0405 UTC Sun Apr 18 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.

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

The monsoon trough extends from 08N82W to 09N96W to 07N111W. The
ITCZ continues from 07N111W to 05N126W to 05N140W. Numerous
moderate to isolated strong convection is from 03N to 12N between
78W to 107W. Scattered moderate convection is from 01N to 08N
between 113W to 140W. 

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A surface high pressure is anchored by a 1025 mb high near 
31N130W and lower pressure continues along western Mexico and 
the Gulf of California. The pressure gradient between these two 
features will support moderate to fresh NW winds across the Baja 
California offshore waters with seas 5 to 6 ft. These conditions
will prevail through Sun morning when NW winds will diminish to 
gentle to moderate. Gentle to moderate NW winds will then 
continue through the middle of the week. Seas will increase to 8 
ft NW of Punta Eugenia by Thu. 

Light to gentle variable winds are forecast in the Gulf of
California through mid-week, except for moderate to locally fresh
NW winds N of 27N expected on Sun morning. Seas will be in the 1
to 3 ft range. Winds are gentle to moderate over the remainder 
of the area with seas in the 5 to 6 ft range.

A moderate gap wind event over the Gulf of Tehuantepec may occur
on Wed into Thu. Seas over the Gulf of Tehuantepec should remain
5 to 6 ft through Tue night, then increase to 6 to 8 ft Wed. 

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

Light to gentle winds and 4 to 6 ft seas will prevail across the
forecast waters through mid-week. Enhanced long-period SW swell 
is forecast to enter the equatorial waters on Sun evening and 
reach the Central America offshores Mon, continuing to affect the
region through the middle of the week. Seas to 8 ft are forecast
over the Equatorial offshores during that period. Otherwise,
widespread heavy showers and thunderstorms are affecting the
Central America and Colombia offshores associated with the
monsoon trough. This precipitation activity is forecast to
continue through Sun evening.

REMAINDER OF THE AREA...

The pressure gradient between a 1025 mb high near 31N131W and 
lower pressures across the ITCZ supports moderate to fresh NE to 
E winds between the ITCZ and 20N W of 125W with seas to 8 ft. 
Gentle to moderate NE to E trade winds with seas to 7 ft are 
elsewhere between the ITCZ/monsoon trough to 20N between 110W and
125W. The high pressure will continue to build Sun through early
next week, supporting fresh to locally strong winds through Tue 
mainly W of 130W. Seas are expected to build up to 10 ft, 
enhanced by mixed SW and NW swell.

$$
AReinhart