000
AXPZ20 KNHC 222209
TWDEP 

TROPICAL WEATHER DISCUSSION     
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC WED AUG 22 2007

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

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1530 UTC.

...TROPICAL WAVES...

TROPICAL WAVE IS OVER COLOMBIA ALONG 76W AND IS MOVING W AT 18 
KT. ONLY A FEW SHOWERS ARE NOTED OVER LAND AND THESE SHOULD MOVE 
W INTO THE COLOMBIA COASTAL WATERS AFTER SUNSET.

TROPICAL WAVE IS ALONG 114W FROM 3N TO 17N MOVING W AT 12 KT. 
ONLY A FEW SHOWERS ARE NOTED ALONG THE WAVE AT 7N.

...ITCZ...

ITCZ AXIS IS ALONG 11N85W 13N95W 12N114W 11N140W. SCATTERED 
MODERATE ISOLATED STRONG CONVECTION IS NOTED N OF 7N E OF 
104W.  

...DISCUSSION...

AN UPPER ANTICYCLONE IS CENTERED NEAR 31N116W WITH ITS ENVELOPE 
OF ANTICYCLONIC FLOW DOMINATING THE DISCUSSION AREA N OF 17N 
BETWEEN 109W AND 123W.

THE CYCLONIC FLOW ASSOCIATED WITH AN UPPER CYCLONE AT 19N142W 
DOMINATES THE UPPER LEVELS OF THE DISCUSSION AREA FROM 12N TO 
24N W OF 134W. 

THE UPPER LEVELS ARE DRY S OF 23N W OF 120W AND APPEAR TO BE A 
LITTLE MOST N OF 23N INCLUDING OVER BAJA. 

THE UPPER LEVEL FLOW IS NE OVER THE AREA E OF LINE 18N103W 
1N124W WITH SOME OF THE UPPER DEBRIS MOISTURE FROM THE 
DISSIPATING CYCLONE DEAN NOW ADVECTED S...AND AS FAR S AS 3S. 
SOME OF THE UPPER MOISTURE FROM DEAN IS ALSO ADVECTED N ACROSS 
TEXAS AND OKLAHOMA TURNING EASTWARD OVER ARKANSAS. 

A WEAK SURFACE TROUGH IS ANALYZED FROM 21N129W TO 24N121W AND IS 
EMBEDDED IN A LOW LEVEL RIDGE THAT COVERS THE AREA N OF 15N W OF 
112W.

$$
NELSON