000
AXPZ20 KNHC 070924
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC FRI SEP 07 2012

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.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 10N86W TO 14N115W TO 11N122W. ITCZ FROM 
07N126W TO 09N140W. SCATTERED MODERATE WITHIN 120 NM N AND 150 
NM S OF AXIS BETWEEN 107W AND 122W.

...DISCUSSION...
A BROAD UPPER LEVEL TROUGH OVER THE NW PORTION OF THE DISCUSSION 
ARE IS N OF 20N W OF 135W. MODERATE TO STRONG SUBSIDENCE WITH 
DRY AND STABLE AIR AT THE MIDDLE LEVELS IS N OF 10N W OF 130W.
AN UPPER LEVEL RIDGE EXTENDS FROM NORTHERN BAJA CALIFORNIA TO 
20N33W. AN INVERTED UPPER TROUGH FROM SOUTHERN BAJA CALIFORNIA 
TO 20N125W TO 14N131W SEPARATES THE ABOVE MENTIONED RIDGE FROM 
AN ANTICYCLONIC CIRCULATION OFF THE COAST OF MEXICO NEAR 21N107W 
WITH RIDGE FROM THE ANTICYCLONE SW TO 10N125W. DIFFLUENT FLOW 
ALOFT IS ENHANCING CONVECTION ALONG THE MONSOON TROUGH/ITCZ 
BETWEEN 107W-122W.

SURFACE TROUGH EXTENDS FROM 25N-29N ALONG 122W. NO SIGNIFICANT 
WEATHER ASSOCIATED WITH THE TROUGH...WHICH IS THE REMNANTS OF 
WHAT WAS ONCE TROPICAL STORM JOHN. OTHERWISE HIGH PRES RIDGE IS 
N OF 20N W OF 125W. SURFACE WINDS ACROSS THE AREA ARE 15 KT OR 
LESS.

$$
DGS