000
AXPZ20 KNHC 091357
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC TUE DEC 09 2008

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. 

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1515 UTC.

...ITCZ...
AXIS ALONG 6N78W 8N115W 11N125W 9N140W.  SCATTERED MODERATE 
ISOLATED STRONG CONVECTION WITHIN 90 NM OF AXIS FROM 108W-113W.  
SCATTERED TO NUMEROUS STRONG CONVECTION FROM 08N-13N BETWEEN 
121W-134W.

...DISCUSSION...
MID/UPPER LEVEL TROUGH EXTENDS FROM 32N137W TO WELL DEFINED 
CYCLONIC CIRCULATION AT 21N139W DRIFTING W.  SCATTERED SHOWERS 
WITH ISOLATED TSTMS ARE WITHIN 360 NM ESE OF VORTEX.  DOWNSTREAM 
UPPER LEVEL RIDGE WITH AXIS FROM 32N125W TO 17N112W.  UPPER 
LEVEL DIFFLUENT FLOW BETWEEN RIDGE AND VORTEX ENHANCING 
CONVECTIVE ACTIVITY FROM 10N-23N BETWEEN 120W-127W.  MID/UPPER 
LEVEL TROUGH EXTENDS FROM SRN ROCKIES INTO WRN MEXICO NEAR 
24N106W.  JET STREAM 100 KT FROM CENTRAL GULF OF CALIFORNIA 
ACROSS NRN MEXICO NEAR 27N104W INTO S TEXAS.  UPPER LEVEL 
ANTICYCLONIC CIRCULATION CENTERED JUST S OF GULF OF TEHUANTEPEC 
AT 14N96W.  DOWNSTREAM UPPER LEVEL TROUGH WITH AXIS FROM BELIZE 
TO CYCLONIC CIRCULATION NEAR 2N95W.  MODERATE TO STRONG 
SUBSIDENCE WITH DRY STABLE AIRMASS COVERS AREA E OF 100W.

SURFACE TROUGH FROM 17N125W TO 1010 MB LOW PRES NEAR 11N130W TO 
7N132W.  SCATTERED TO NUMEROUS SHOWERS AND TSTMS ARE WITHIN 190 
NM S OF LOW PRES.  SURFACE RIDGE EXTENDS FROM 32N130W TO 20N116W.

$$
WALLY BARNES