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Eastern North Pacific Tropical Weather Discussion



270 
AXPZ20 KNHC 170954
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1005 UTC Wed Jul 17 2019

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 0600 UTC surface analysis and satellite imagery through 
0830 UTC. 

...TROPICAL WAVES...

A tropical wave with axis near 98W N of 03N is moving west at 15 
to 20 kt. Scattered moderate and isolated strong convection is 
noted north of 14N between 98W and 102W.

A tropical wave with axis near 118W from 03N to 20N is moving 
west at 15 to 20 kt. Scattered moderate isolated strong 
convection is associated with the monsoon trough between 110W 
and 121W. 

A tropical wave with axis near 138W from 03N to 19N is moving 
west around 15 kt. No significant deep convection is occurring 
in association with this wave.

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

The monsoon trough extends from 09N79W to 11N94W to 10N112W to 
12N122W to 10N135W. Scattered moderate isolated strong 
convection is noted from 05N to 08N between 86W and 89W. 
Scattered moderate isolated strong convection is noted from 07N 
to 12N between 110W and 125W.

OFFSHORE WATERS WITHIN 250 NM OF MEXICO... 

A surface high well west of California is contributing to 
quiescent winds over most of the Mexican offshore zones through 
Sun. A complex low pressure system over the U.S. Great Basin is 
forcing SE fresh to strong breeze over the central and northern 
Gulf of California through today. A surface high over the Gulf 
of Mexico combined with the monsoon trough will force a N fresh 
to strong gap wind event in the Gulf of Tehuantepec through Fri. 
No tropical cyclone activity is expected to impact the Mexican 
offshore zones for the next several days. No significant long 
period-swell should affect the area through at least Sun. 

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

A moderate N to S pressure gradient across Central America is 
forcing NE to E winds up to strong breeze in the Gulf of Papagayo
through Sun. Elsewhere E winds should remain moderate or weaker 
north of the monsoon trough along 10N, and S to SW moderate 
breeze or weaker south of the trough. No tropical cyclone 
activity is expected to impact the Central America offshore 
zones for the next several days. No significant long- period 
swell should affect the area through at least Sun.

REMAINDER OF THE AREA... 

A ridge extends from high pressure northwest of the area to near 
the Revillagigedo Islands. The pressure gradient between the 
high and lower pressure along the monsoon trough will support 
moderate to fresh NE trade winds for the next several days. Weak 
low pressure of 1008 mb is centered near 11N94W. Environmental 
conditions are forecast to become conducive for gradual 
development of this low later this week. No significant long 
period-swell should affect the area through at least Sun. 

$$
Mundell