000
AXPZ20 KNHC 260913
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC SAT SEP 26 2009

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...
AXIS IS ALONG 7N78W 11N95W 11N101W 14N125W 10N140W. SCATTERED 
MODERATE TO STRONG CONVECTION WITHIN 200 NM S OF AXIS FROM 
113W-118W AND WITHIN 150 NM N OF AXIS FROM 134W-140W.

...DISCUSSION...
BROAD UPPER LEVEL CYCLONIC CIRCULATION IS CENTERED NEAR 27N133W 
WITH CYCLONIC FLOW N OF 20N W OF 120W . MODERATE TO STRONG 
SUBSIDENCE WITH DRY STABLE AIR AT THE MID TO UPPER LEVELS OF THE 
ATMOSPHERE COVERS THE AREA N OF 20N W OF 120W. AN UPPER LEVEL 
RIDGE IS S OF THE CYCLONIC CIRCULATION FROM 18N120W TO AN 
ANTICYCLONIC CIRCULATION NEAR 15N132W. UPPER LEVEL DIFFLUENT 
FLOW IS ENHANCING CONVECTIVE ACTIVITY ALONG THE ITCZ W OF 130W. 
ANOTHER E TO W RIDGE EXTENDS FROM AN ANTICYCLONIC CIRCULATION 
OVER THE GULF OF MEXICO ACROSS CENTRAL MEXICO TO 20N115W. UPPER 
LEVEL DIFFLUENT FLOW S OF THE RIDGE IS ENHANCING A LARGE CLUSTER 
OF STRONG CONVECTION ALONG THE COAST OF MEXICO N OF 13N BETWEEN 
93W AND 103W.

SURFACE HIGH PRES RIDGE IS N OF 20N W OF 115W. BROKEN TO OVERCAST
STRATOCUMULUS CLOUDS WITHIN THE RIDGE N OF 15N W OF 120W. THE 
REMNANT LOW OF NORA IS CENTERED NEAR 17N125W. CONVECTIVE 
ACTIVITY HAS FLARED UP NEAR NORMA EARLIER IS DECREASING AS THE 
LOW MOVES INTO DRY STABLE AIR AND SW SHEAR ALOFT. A A SURFACE 
TROUGH IS ANALYZED ALONG THE ITCZ FROM 15N-7N ALONG 114W. 
MODERATE TO STRONG CONVECTION WITH THE IS S OF THE ITCZ FROM 
8N-12N BETWEEN 113W-118W.

$$
DGS