000
AXPZ20 KNHC 040922
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1005 UTC Mon Sep 4 2017

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.
  
...TROPICAL WAVES...

A tropical wave axis is along 107W from 12N to 22N, moving west 
at 15 kt. Scattered moderate to strong convection is from 19N to 
22N E of 108W.

..INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... 

The monsoon trough axis extends from 09N83W to 1011 mb low pres 
near 08N89W to 1012 mb low pres near 14N104W to 12N115W to 1013 
mb low pres near 15N127W to 13N140W. Scattered moderate isolated 
strong convection is from 06N to 12N between 90W and 99W.
 
...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

The 1012 mb remnant low of Lidia near 31N119W will move north of 
the discussion area later today. Scatterometer data shows 10-15 
kt winds near the low center. The eastern periphery of a weak 
ridge over the NW portion of the area will build eastward and 
persist through Thursday. The pres gradient will support gentle 
to moderate NW winds, and seas of 3 to 5 ft across these waters.

Farther south, fresh overnight gap winds are possible through 
the Gulf of Tehuantepec early this morning and then again later 
in the week, with seas building to near 7 ft. Light to gentle 
winds and seas of 4 to 6 ft will prevail elsewhere.

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

Moderate to locally fresh offshore breezes in Gulf of Papagayo 
will shift west of the Gulf from 10N to 12N between 88W and 92W 
by Tue afternoon. Light variable winds are expected elsewhere N 
of the monsoon trough through Tuesday, and moderate to locally 
fresh southerly winds are expected S of the monsoon trough with 
4-6 ft seas over the entire area.

REMAINDER OF THE AREA...

A weak high analyzed near 27N132W extends a ridge to 23N119W. 
The gradient between the high and lower pressure associated with 
the monsoon trough will maintain mostly gentle trade winds N of 
14N and W of 121W, with seas remaining 5-6 ft through Tuesday. 
Moderate SW winds are expected S of the monsoon trough through 
Tue. Long period cross-equatorial swell producing combined seas 
of 7-8 ft in SW waters today will slowly decay through late Tue.

$$
Mundell