Eastern North Pacific Tropical Weather Discussion (Text)

AXPZ20 KNHC 191539


Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1605 UTC TUE JUN 14 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 1200 UTC surface analysis and satellite imagery through 
1430 UTC.


A tropical wave is propagating across the eastern Pacific Ocean 
just to the west of the Gulf of Tehuantepec. The wave is along 
96W N of 07N. Scattered moderate to isolated strong convection 
is from 10N to 16N between 92W and 102W. 


Monsoon trough extends from 10N85W to 13N100W to 12N120W to 
13N140W. Scattered moderate convection is from 03N to 08N 
between 77W and 84W. Scattered moderate to isolated strong 
convection is from 07N to 12N between 87W and 91W. Scattered 
moderate to isolated strong convection is from 12N to 16N W of 


Broad cyclonic wind flow, and comparatively drier air in
subsidence in water vapor satellite imagery, cover the Pacific
Ocean to the north of the line that passes through 32N140W to 
25N132W 25N129W, beyond 27N114W. Upper level anticyclonic wind 
flow covers the area that is from 05N northward between 100W and 

To the North of 15N and to the east of 120W:  

A surface ridge passes through 32N137W to 26N128W to 17N114W.
Surface anticyclonic wind flow covers the Pacific Ocean from 13N
northward from 112W westward. A surface trough is in the
northernmost part of the Gulf of California. A surface trough
cuts right through the center of mainland Mexico. The surface
pressure gradient that exists between the ridge and the troughs
is supporting gentle to moderate winds, and seas in the range
from 5 feet to 7 feet. The ridge will continue to build during
the next few days, which will freshen winds off the Baja
California coast with seas building to 6 to 8 feet.

To the South of 15N and to the east of 120W:

A tropical wave is moving through the far eastern waters. Light
to gentle monsoonal flow prevails to the south of the monsoon
trough, while gentle to moderate southeasterly trade winds
prevail to the south of the ITCZ. Light to gentle northeasterly
trade winds prevail to the north of the monsoon trough and the
ITCZ. Southwesterly swell continues to propagate across the area
with seas in the 6 to 8 foot range from 100W westward, and in
the 4 to 6 foot range from 100W eastward.

Model guidance forecasts a surface low pressure center 14N96W in 
24 hours, and near 15N99W in 48 hours. Sea heights reaching 8 
feet to 11 feet are forecast in 48 hours. 

Elsewhere to the west of 120W:

High pressure prevails in the northern waters. The surface
pressure gradient that exists between the high pressure that is
to the north, and the lower pressure that is in the vicinity of 
the ITCZ, will maintain moderate to fresh trade winds to the N 
of 26N west of 130W, with sea heights in the 8 foot to 10 foot 
range. The ridge will prevail in the northern waters during the 
next few of days with these general conditions persisting. 


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Page last modified: Tuesday, 19-Sep-2017 15:41:28 UTC