000
AXPZ20 KNHC 101541
TWDEP 

TROPICAL WEATHER DISCUSSION      
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC MON SEP 10 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 
1500 UTC.

...TROPICAL WAVES...
TROPICAL WAVE ALONG 95W N OF 8N MOVING W NEAR 10 KT. WEAK WAVE 
INVERTED-V CURVATURE IS OBSERVED. SCATTERED MODERATE ISOLATED STRONG 
CONVECTION EMBEDDED WITHIN THE ITCZ FROM 8N-11N BETWEEN 95W-99W. 

TROPICAL WAVE ALONG 116W/117W FROM 8N-16N MOVING W 5-10 KT. WELL 
DEFINED BUT LOW AMPLITUDE INVERTED-V CURVATURE IS OBSERVED WITH NO 
ASSOCIATED DEEP CONVECTION. SCATTERED SHOWERS/THUNDERSTORMS ARE 
EMBEDDED WITHIN THE ITCZ FROM 10N-13N BETWEEN 115W-119W. 

TROPICAL WAVE ALONG 128W FROM 7N-16N MOVING W NEAR 10 KT. BROAD 
INVERTED-V CURVATURE WITH AN EMBEDDED MID LEVEL ROTATION ALONG THE 
WAVE NEAR 12N. SCATTERED STRONG CONVECTION IS FROM 10N-15N BETWEEN 
124W-129W. 

...ITCZ...
ITCZ AXIS CENTERED ALONG 8N78W 10N89W 10N100W 15N109W 11N121W 
10N140W. A WEAK 1008 MB LOW IS EMBEDDED WITHIN THE ITCZ NEAR 15N104W 
AND ALTHOUGH HAS A WELL DEFINED LOW LEVEL ROTATION NO ASSOCIATED 
DEEP CONVECTION. SCATTERED SHOWERS/THUNDERSTORMS ARE FROM 11N-18N 
BETWEEN 103W-107W. IN ADDITION TO CONVECTION ASSOCIATED WITH THE 
TROPICAL WAVES...CLUSTERS OF SCATTERED MODERATE/ISOLATED STRONG 
CONVECTION ARE FROM 11N-14N BETWEEN 110W-116W AND FROM 9N-12N 
BETWEEN 118W-123W. 

...DISCUSSION...
A BROAD UPPER LOW IS CENTERED NEAR 32N135W WITH THE UPPER TROUGH 
EXTENDING OVER THE AREA N OF 25N FROM 127W TO BEYOND 140W. AN UPPER 
HIGH IS CENTERED NEAR 20N121W COVERING THE AREA FROM 15N-30N BETWEEN 
115W-133W WITH A SECOND UPPER HIGH W OF THE REGION COVERING THE 
REMAINDER OF THE AREA S OF 24N W OF 135W. AN UPPER LOW IS INLAND 
OVER S MEXICO NEAR 20N98W EXTENDING AN UPPER TROUGH TO ALONG THE 
COAST OF MEXICO FROM 17N-22N GENERATING SCATTERED SHOWERS/ISOLATED 
THUNDERSTORMS WITHIN 60 NM ALONG THE COAST FROM PUERTO VALLARTA TO 
ACAPULCO. ZONAL EASTERLY UPPER FLOW COVERS THE REGION E OF 100W. AN 
UPPER LOW IS IN TROPICAL PACIFIC NEAR 3N129W COVERING THE AREA E OF 
112W TO BEYOND 140W. AT THE SURFACE...THE REMNANTS OF FELIX FROM THE 
ATLANTIC...IS A SURFACE TROUGH THAT EXTENDS ALONG 110W FROM 17N-22N 
WITH SCATTERED SHOWERS AND POSSIBLE ISOLATED THUNDERSTORMS FROM 
18N-20N BETWEEN 110W-113W AS THE TROUGH DRIFTS WESTWARD. A 
QUASI-STATIONARY 1010 MB LOW IS CENTERED NEAR 32N126W WITH A SURFACE 
TROUGH EXTENDING SW TO 25N132W BLOCKED BY A WEAK BUT PERSISTENT 
1016 MB HIGH LOCATED NEAR 26N122W. THE UPPER LEVELS ARE VERY DRY N 
OF 15N W OF 112W...THUS LOW LEVEL CLOUDS WITH LIMITED ACTIVITY 
COVERS MUCH OF THE REGION. 

$$
WALLACE