000
AXPZ20 KNHC 310230
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
0405 UTC Fri Jul 31 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 0000 UTC surface analysis and satellite imagery through 
0230 UTC.

...TROPICAL WAVES...

A tropical wave axis is along 86W, north of 01N into Central 
America, moving west at 10 to 15 kt. Isolated showers are noted 
near the wave axis.

A tropical wave axis is along 98W, N of 02N into southern 
Mexico, moving west at 10 to 15 kt. Scattered moderate 
convection is noted from 09N to 11N between 96W and 100W.
 
A tropical wave axis is along 107W, from 02N to 17N, moving west 
at 10 to 15 kt. Scattered moderate isolated strong convection is 
noted from 07N to 14N between 105W and 112W. 

A tropical wave axis is along 126W/127W, from 05N to 19N, moving 
west at 10 to 15 kt. Scattered moderate isolated strong 
convection is noted from 11N to 17N between 124W and 130W.

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

The monsoon trough extends from 08N78W in Pananma to 10N91W to 
10N112W to 16N121W to 11N133W to 11N140W. Scattered moderate 
convection is noted from 07N to 14N between 99W and 114W, and 
from 09N to 15N between 123W and 136W. Scattered moderate to 
strong convection is observed from 09N to 13N west of 136W.

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

The pressure gradient between a weak ridge centered near 31N134W 
and an elongated trough over the southwest U.S. into NW Mexico 
will continue to support moderate to fresh NW winds west of Baja 
California Norte through Fri night, with 4-6 ft seas. Moderate 
to fresh southerly winds are expected in the northern Gulf of 
California through Tue. Farther south, fresh northerly winds are 
possible in the Gulf of Tehuantepec region on Sun.

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

A monsoon trough along 09N to 10N east of 90W is expected to 
increase convective activity near and west of Panama and Costa 
Rica during the next couple days, as weak tropical waves migrate 
westward across the area. Gentle to moderate southerly winds 
will prevail south of the monsoon trough through Mon. Fresh NE 
to E winds will pulse in the Gulf of Papagayo region overnight.

REMAINDER OF THE AREA...

A weak ridge of high pressure extends over the waters north of 
15N. The gradient between the ridge and the monsoon trough is 
supporting moderate NE trade winds north of the trough axis west 
of 115W. A weak cyclonic circulation is evident from satellite 
imagery near 16N124W. A scatterometer pass showed 15-20 kt winds 
NW of the low center. A shrinking area of cross-equatorial SE 
swell with 7-9 ft seas is located south of 15N and west of 122W. 
The area of 8 ft seas is expected to shift W of 140W Sat night.

$$
Mundell