000
AXPZ20 KNHC 101508
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC WED JUN 10 2009

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 
1500 UTC.

...ITCZ...
AXIS IS ALONG 7N84W 9N117W 6N130W 5N140W. SCATTERED STRONG 
CONVECTION N OF 3N E OF 85W. SCATTERED MODERATE ISOLATED STRONG 
CONVECTION FROM 05N TO 10N BETWEEN 95W AND 110W. SCATTERED TO 
NUMEROUS MODERATE TO STRONG CONVECTION FROM 07N TO 13N BETWEEN 
115W AND 125W.
    
...DISCUSSION...
MID/UPPER LEVEL TROUGH EXTENDS FROM 32N122W TO 20N140W. MODERATE 
TO STRONG SUBSIDENCE WITH DRY STABLE AIR AT THE MID AND UPPER 
LEVELS OF THE ATMOSPHERE COVERS THE AREA FROM 20N-30N W OF 115W. 
A LARGE UPPER LEVEL ANTICYCLONIC CIRCULATION CENTERED OVER 
CENTRAL MEXICO WITH AXIS FROM THE CENTER NEAR 20N101W TO 
12N125W. UPPER LEVEL TROUGH FROM THE WESTERN CARIBBEAN EXTENDS 
ACROSS HONDURAS TO 9N93W. DIFFLUENT UPPER LEVEL FLOW BETWEEN THE 
TROUGH AND AN ANTICYCLONIC CIRCULATION CENTERED OVER S AMERICA 
IS ENHANCING CONVECTIVE ACTIVITY NEAR THE GULF OF PANAMA N OF 3N 
E OF 85W.

LOW PRESSURE THAT HAD BEEN ANALYZED OVER THE SW PORTION OF THE 
DISCUSSION AREA HAS WEAKENED TO A TROUGH. THE TROUGH AXIS 
EXTENDS FROM 12N112W TO 8N125W. TROUGH IS STRONG ENOUGH TO 
PRODUCE 20 KT WINDS WITHIN 240 NM EITHER SIDE OF THE AXIS. 
SCATTERED TO NUMEROUS SHOWERS AND TSTMS ASSOCIATED WITH THE 
TROUGH IS BEING ENHANCED BY UPPER LEVEL DIFFLUENT FLOW SE OF THE 
ABOVE MENTIONED UPPER LEVEL RIDGE. THE TROUGH IS EXPECTED TO 
DRIFT WNW. 

ANOTHER WEAK SURFACE TROUGH EXTENDS FROM 12N134W TO 8N136W. 
THERE IS NO SIGNIFICANT WEATHER ASSOCIATED WITH THE TROUGH.
OTHERWISE SURFACE RIDGE WITH AXIS FROM 32N140W 24N119W TO 
16N102W.
 
$$
DGS