000
AXPZ20 KNHC 200406
TWDEP 

TROPICAL WEATHER DISCUSSION  
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC SAT JUN 20 2009

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

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0330 UTC.

...TROPICAL WAVES...
TROPICAL WAVE IS N OF 8N ALONG 102W MOVING W 10-15 KT. A LARGE 
AREA OF STRONG CONVECTION IS N OF 14N WITHIN 200 NM W OF THE 
WAVE. THE CONVECTION IS NOT ORGANIZED OR CONSOLIDATING AT THIS 
TIME.

...ITCZ...
AXIS IS ALONG 9N83W 14N100W 14N110W 8N128W 6N140W. SCATTERED 
MODERATE ISOLATED STRONG WITHIN 300 NM S OF AXIS FROM 88W-101W
AND WITHIN 180 NM S OF AXIS FROM 107W-112W AND WITHIN 100 NM S 
OF AXIS FROM 127W-130W.

...DISCUSSION...
MIDDLE AND UPPER RIDGE HAS WEAKENED AND IS N OF 20N W OF 131W. 
MODERATE TO STRONG SUBSIDENCE OVER THE AREA PRODUCING DRY AND 
CLOUD FREE IN THE MIDDLE AND UPPER LEVELS WITH OVERCAST TO 
BROKEN STRATOCUMULUS IN THE LOWER LEVELS.

WELL DEFINED SHORTWAVE IS N OF 18N FROM 110W TO 120W WITH AN 
UPPER LEVEL CYCLONIC CIRCULATION ALONG THE ARIZONA MEXICO BORDER 
NEAR 32N113W. THE AREA IS DRY AND CLOUD FREE IN THE MIDDLE AND 
UPPER LEVELS OVER THE PACIFIC BUT THERE IS MOISTURE AND SOME 
CLOUDINESS OVER THE NORTHWEST PART OF MEXICO IN THE STATE OF 
SONORA...THE EARLIER CONVECTION HAS DISSIPATED. IN THE LOWER 
LEVELS MOSTLY OVERCAST STRATOCUMULUS IS OBSERVED OVER THE 
PACIFIC. DIFFLUENT UPPER FLOW E OF THE TROUGH COUPLED WITH SLY 
FLOW PRODUCING A BROAD AREA OF DEEP LAYER MOISTURE WITH MULTI 
LEVEL CLOUDS AND EMBEDDED AREAS OF CONVECTION.

SURFACE TROUGH EXTENDS FROM 12N129W TO A 1010 MB LOW ANALYZED 
ALONG THE ITCZ NEAR 8N131W THE TROUGH CONTINUES TO 4N131W. 
MODERATE SURFACE RIDGE IS N OF 15N W OF 123W.
 
$$
DGS