000
AXPZ20 KNHC 241557
TWDEP 

TROPICAL WEATHER DISCUSSION     
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC FRI AUG 24 2007

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 
1545 UTC.

...TROPICAL WAVES...

TROPICAL WAVE HAS ENTERED THE DISCUSSION AREA ALONG 86W/87W N OF 
5N AND IS MOVING W 10-15 KT. ONLY ISOLATED MODERATE CONVECTION 
IS NOTED ALONG THE WAVE AXIS. 

TROPICAL WAVE ALONG 122W HAS BECOME ILL DEFINED WITHIN AN AREA 
OF SOUTHWESTERLY FLOW. A 1422 UTC QUIKSCAT PASS CONFIRMED THE 
EXISTENCE OF THIS BROAD AREA OF W TO SW FLOW WHICH HAS MADE THE 
WAVE ILL DEFINED AND OTHERWISE DIFFICULT TO TRACK. 

...ITCZ...
ITCZ AXIS IS ALONG 6N77W 8N85W 16N94W 10N115W 10N125W 9N140W.
SCATTERED MODERATE WITHIN 60 NM N OF AXIS BETWEEN 100W AND 104W. 

...DISCUSSION...
W OF 110W...
TWO ANTICYCLONES DOMINATE THE FLOW OVER THE AREA WITH THE FIRST 
ONE CENTERED NEAR 28N128W AND THE SECOND...A MUCH LARGER 
CIRCULATION CENTERED NEAR 28N110W/NW MEXICO. A SMALL CYCLONIC 
CIRCULATION WAS LOCATED BETWEEN THE TWO FEATURES NEAR 26N118W. 
MODERATE MID TO UPPER LEVEL ELY FLOW PREVAILED S OF THE 
ANTICYCLONES AND WAS ADVECTING MID TO UPPER LEVEL MOISTURE WWD 
FROM THE ITCZ NWD TO BAJA CALIFORNIA AND NW MEXICO. DRY 
SUBSIDENT AIR PREVAILED OVER THE W PORTION OF THE AREA N OF 10N 
AND W OF 125W...LIMITING CONVECTION ALONG THE ITCZ W OF 120W. 
THE FLOW BECAME DIFFLUENT OVER THE TROPICS AND ENHANCED 
CONVECTION ALONG THE ITCZ E OF 120W. AT THE SURFACE...A BROAD
WEAK 1009 MB LOW PRESS AREA WAS NEAR 19N130W AND WAS MARKED BY 
TURNING IN THE STRATOCUMULUS FIELD. ANOTHER WEAK AREA OF LOW 
PRESS WAS NOTED ALONG THE ITCZ NEAR 10N126W. OTHERWISE...HIGH 
PRESS DOMINATED THE AREA N OF 20N W OF 125W. 

E OF 110W...
MODERATE MID TO UPPER NE FLOW PREVAILED OVER THE PACIFIC E OF 
110W. THIS FLOW ADVECTED COPIOUS AMOUNTS OF MID TO UPPER LEVEL 
MOISTURE/CONVECTIVE DEBRIS WWD ACROSS THE AREA. THIS FLOW WAS 
ALSO DIFFLUENT IN NATURE AND AIDED IN THE MAINTENANCE OF DEEP 
CONVECTION ALONG THE ITCZ. A SMALL CYCLONIC CIRCULATION WAS 
LOCATED OVER CENTRAL MEXICO NEAR 21N100W...MOVING WWD 10-15 KT. 
AT THE SURFACE...CLUSTERS OF SCATTERED MODERATE CONVECTION ARE 
FLARING OVER SRN BAJA CALIFORNIA AND WITHIN 120-180 NM OF THE 
COAST OF MEXICO NEAR CABO CORRIENTES AND PUERTO VALLARTA IN 
ASSOCIATION WITH A SURFACE TROUGH ALONG 20N108W 25N109W. THIS 
TROUGH IS ESSENTIALLY THE REMNANTS OF HURRICANE DEAN. 

$$
COBB