000
AXPZ20 KNHC 030312
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
0405 UTC Fri Sep 3 2021

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 0000 UTC surface analysis and satellite imagery through
0330 UTC.

...TROPICAL WAVES...

A tropical wave extends from 04N to 19N with axis near 114W,
moving west at 15-20 kt. Scattered moderate convection is from
08N to 17N between 108W and 120W. 

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

The monsoon trough extends from 12N87W to 14N108W to 11N120W to
11N130W to 09N135W. The ITCZ begins near 09N135W and continues
beyond 08N140W. Aside from the convection associated with the
tropical wave, scattered moderate convection is N of 08N between
92W and 105W. 

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Moderate to locally fresh NW winds off the Baja California
peninsula will gradually diminish to gentle to moderate tonight
and to light to gentle by Sat night as the pressure gradient 
relaxes across the region. Seas of 3 to 5 ft will build to 6-7 ft
along the coast of Mexico as long period SW swell reaches the 
area Fri through early next week.  

Light to gentle variable winds are elsewhere and will prevail 
through Tue, except for the offshore waters between Guerrero and
Jalisco where an area of low pressure is forecast to develop Mon
night into Tue. Environmental conditions are expected to be 
conducive for some gradual development of the system thereafter 
as it moves west-northwestward away from southwestern Mexico. 

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

Light to gentle variable winds across the Central America and
Colombia offshore waters will prevail trough Sat. Moderate to 
locally fresh SW winds are forecast for the region of Costa Rica,
Panama and Colombia by Sat night, continuing through the middle
of next week. Seas of 3 to 4 ft will build to 5-6 ft over the
weekend into next week due to long period SW swell. 

Moderate to locally fresh SW winds are forecast for the Ecuador
and Galapagos Islands during the weekend and through most of the
upcoming week. Seas of 5 to 6 ft will build to 7 to 8 ft due to
long period SW swell. 

REMAINDER OF THE AREA...

A surface trough extends from 30N120W to 25N126W. Moderate north-
northeast winds and seas of 5-7 ft remain to the north of the 
trough. Winds and seas will decrease through Sat as the trough 
shifts slowly southeastward and dissipates. Otherwise, broad and 
weak high pressure dominates the waters north of the monsoon 
trough, along with gentle to moderate northeast trades. Gentle 
to moderate southerly winds prevail south of the monsoon trough, 
moderate to locally fresh east of 128W. Seas of 5-8 ft in mixed 
long-period swell dominate the waters. Little overall change in 
these marine conditions is forecast through the next few days.

$$
Ramos