000
AXPZ20 KNHC 222130
TWDEP 

Tropical Weather Discussion 
NWS National Hurricane Center Miami FL
2205 UTC Wed Jun 22 2016

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
2100 UTC.
  
..INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...         

The monsoon trough extends W from 10N86W TO 09N126W, then ITCZ
from 09N126W to 07N140W. Scattered moderate isolated strong
convection within 240 NM S and 150 NM N of the axis between 93W
and 127W.
  
...DISCUSSION...   

A broad ridge extends over northwestern waters from 30N120W to
18N140W. An area of low pressure is analyzed near 33N120W, and a
surface high is centered near 23N119W. An insignificant gradient
exists between these two features, and winds are generally light
and variable across NE waters. A weak surface trough is over the
Gulf of California. Scatterometer data shows fresh to strong
northerly winds N of 30N between 122W and 130W. These winds are
enhancing sea heights in northern waters added to a residual 5-6
ft cross-equatorial SSW swell.

Gentle to moderate winds prevail elsewhere, except for a narrow
band of gap-induced winds extending 40-60 nm downwind from the
Gulf of Tehuantepec. The pressure gradient between high pressure
over the Gulf of Mexico and low pressure associated with the
monsoon trough will maintain fresh NNE flow across the Gulf of
Tehuantepec tonight into Thu morning. Max seas in this region
are 11-12 ft due to the mixing of NE wind waves and long period
cross-equatorial SW swell.
   
Large long period cross-equatorial SW swell continues to spread
northward, and combined seas of 8-12 ft can be expected across a
large portion of the area east of 120W, with the potential for
hazardous surf along exposed areas of the Central American
coast. These seas will begin to subside Thu night and Fri.

$$
Mundell