000
AXPZ20 KNHC 181952
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
2205 UTC Sun Oct 18 2020

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
1945 UTC. 

...TROPICAL WAVES...

A tropical wave axis extends along 116W from 02N to 17N, moving 
W at 10 to 15 kt. Scattered moderate convection is noted from 
05N to 15N between 108W and 118W.

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

The monsoon trough axis extends from near 09N78W to 11N97W to 
10N117W to 1011 mb low pressure near 16N135W to beyond 11N140W.
Scattered moderate convection is noted from 04N to 10N E of 88W,
from 07N to 16N between 94W and 108W, and from 07N to 21N between
121W and 136W.

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Gulf of Tehuantepec: High pressure building across the Gulf of 
Mexico continues to force northerly gap winds across the Gulf of 
Tehuantepec. These winds are expected to persist around 30 kt 
into tonight, with strong winds prevailing through Mon night. 
Peak seas are currently 8 to 10 feet. These seas will only 
gradually subside, but remain above 8 ft into Mon.

A 1022 mb high pressure is centered west of Baja California near
28N126W. The pressure gradient between the high pressure and 
lower pressure over the Sonoran desert is supporting moderate to 
fresh NW winds across the offshore waters of northern and central
Baja California from Punta Eugenia northward. Farther south, 
with exception of strong winds across the Gulf of Tehuantepec, 
gentle to moderate breezes persist. Seas are generally in the 4 
to 7 ft range in mixed N and SW swell.

The winds west of Baja California will continue through early 
week, with locally strong winds Mon. Mostly gentle to moderate 
breezes and slight seas will persist elsewhere. 

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

Moderate to fresh SW winds prevail south of the monsoon trough
along about 10N-11N and east of 90W. Seas are 5 to 7 ft 
primarily in SW swell. 

Building high pressure north of the region will support pulses 
of moderate to fresh gap winds through the Gulf of Papagayo and 
southern Nicaragua this evening. Expect moderate to fresh SW 
winds and seas building to 9 ft in SW swell south of Panama on 
Mon. 

REMAINDER OF THE AREA...

A deep layer trough along 135W S of 25N extends south to a 
surface low of 1011 mb near 16N135W. This low and associated
trough will weaken as it moves NW through tonight, then will move
W of the region Mon. High pressure will then build north of 20N,
supporting fresh trade winds early this week from roughly 15N to
25N mainly west of 125W.

Farther east, seas will will remain near 8 ft tonight near the 
monsoon trough between 110W and 120W, due in part to fresh 
northerly swell emerging out of the Gulf of Tehuantepec and new 
longer period SW swell moving into the area. 

$$
KONARIK