000
AXPZ20 KNHC 090926
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC TUE DEC 09 2008

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

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

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

...DISCUSSION...
MID/UPPER LEVEL TROUGH EXTENDS FROM 32N137W TO WELL DEFINED 
CYCLONIC CIRCULATION NEAR 21N139W DRIFTING W. SCATTERED SHOWERS 
WITH ISOLATED TSTMS ARE WITHIN 360 NM ESE OF THE CYCLONIC 
CIRCULATION. DOWNSTREAM UPPER LEVEL RIDGE WITH AXIS FROM 32N125W 
TO 17N112W. UPPER LEVEL DIFFLUENT FLOW BETWEEN THE RIDGE AND 
CYCLONIC CIRCULATION IS ENHANCING CONVECTIVE ACTIVITY FROM 
10N-23N BETWEEN 120W-127W. MID/UPPER LEVEL TROUGH EXTENDS FROM 
THE SOUTHERN ROCKIES INTO WESTERN MEXICO NEAR 24N106W. A 90-100 
KT JET STREAM FROM THE CENTRAL GULF OF CALIFORNIA ACROSS 
NORTHERN MEXICO NEAR 27N104W INTO S TEXAS. UPPER LEVEL 
ANTICYCLONIC CIRCULATION IS CENTERED JUST S OF THE GULF OF 
TEHUANTEPEC NEAR 14N96W. DOWNSTREAM UPPER LEVEL TROUGH WITH AXIS 
FROM BELIZE TO A CYCLONIC CIRCULATION NEAR 2N95W. MODERATE TO 
STRONG SUBSIDENCE WITH DRY STABLE AIRMASS COVERS THE AREA E OF 
100W.

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

$$
DGS