687 
AXPZ20 KNHC 010942
TWDEP

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
942 UTC Wed Aug 1 2018

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
0900 UTC. 

...SPECIAL FEATURES...

Tropical Storm Hector centered near 13.4N 119.4W at 01/0900 UTC
or 790 nm SW of The Southern Tip Of Baja California moving WNW
at 13 kt. Estimated minimum central pressure is 1006 mb. Maximum
sustained wind speed is 35 kt with gusts to 45 kt. Scattered
moderate to isolated strong convection is active within 120 nm NW
and 90 nm SE semicircles. See latest NHC forecast/advisory under
AWIPS/WMO headers MIATCPEP5/WTPZ35 KNHC for more details.

...TROPICAL WAVES...

A tropical wave is along 103W from 08N to 16N. Scattered moderate
convection is observed where the tropical wave interacts with
the monsoon trough from 11N to 14N between 98W and 101W.


Another tropical wave is along 138W/139W from 09N to 19N. No
significant convection is noted. 

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

The monsoon trough axis extends from 08N83W to 15N112W to T.S. 
Hector located near 13.4N 119.4W to 11N137W. Scattered moderate 
convection is observed from from 11N to 14N between 98W and 101W,
from 11N to 13N between 108W to 112W, and from 09N to 11N between
130W and 135W.
  
...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Gulf of Tehuantepec: Mainly gentle to moderate winds will prevail 
across the Gulf of Tehuantepec through Fri. Wind are forecast to
increase to 20-30 kt across the Tehuantepec region this upcoming
weekend as the pressure gradient strengthens across SE Mexico. 

Elsewhere, a weak ridge will dominate the offshore forecast
waters W of the Baja California Peninsula, maintaining a weak 
pressure gradient, with light to gentle NW winds across the 
region and 3 to 5 ft seas. Then, seas are expected to build to 
5 to 7 ft in long period swell late this week, but mainly N of 
Punta Eugenia.

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

Gulf of Papagayo: Moderate easterly flow is expected through the
week, occasionally pulsing to fresh during the overnight and
early morning hours, with seas building to 6 or 7 ft. 
  
Gentle to occasionally moderate E winds are forecast elsewhere N 
of the monsoon trough which is meandering between 08N and 10N. 
Moderate to locally fresh southerly winds are forecast S of the 
monsoon trough through the week accompanied by 5 to 7 ft seas.
  
REMAINDER OF THE AREA...   

Elsewhere, a ridge will persist north of 20N west of 120W 
through the week, supporting moderate N to NE winds and 4 to 7 
ft seas. Moderate to locally fresh southerly winds are forecast 
elsewhere S of the monsoon trough or roughly S of 10N for the 
next several days. 

An area of low pressure is expected to form several hundred miles
south of the Gulf of Tehuantepec late this week. Gradual development
of this system is possible thereafter as it moves west-northwestward
off the coast of Mexico.
  
$$
Christensen