000
AXPZ20 KNHC 010928
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC FRI AUG 01 2008

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

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0830 UTC.

...TROPICAL WAVES... 

A TROPICAL WAVE IS N OF 08N ALONG 91W/92W MOVING W NEAR 15 KT. 
NO ORGANIZED CONVECTION IS ASSOCIATED WITH THIS FEATURE. 

A TROPICAL WAVE IS N OF 04N ALONG 111W MOVING W NEAR 10 KT. NO 
ORGANIZED CONVECTION IS ASSOCIATED WITH THIS FEATURE.

...ITCZ...

THE ITCZ AXIS IS CENTERED ALONG 09N83W 08N115W 10N126W 09N140W. 
A 1008 MB IS ANALYZED EMBEDDED WITHIN THE ITCZ NEAR 09N104W 
DRIFTING SLOWLY WESTWARD WITH AN AREA OF SCATTERED MODERATE TO 
ISOLATED STRONG CONVECTION SW OF THE LOW FROM 07N TO 10N BETWEEN 
104W AND 107W. CLUSTERS OF SCATTERED MODERATE TO ISOLATED STRONG 
CONVECTION IS FROM 04N TO THE COAST OF PANAMA BETWEEN 78W AND 
85W. CLUSTERS OF SCATTERED MODERATE CONVECTION DOT THE AREA FROM 
04N TO 08N BETWEEN 86W TO 93W AND FROM 07N TO 14N BETWEEN 125W 
TO 134W. 

...DISCUSSION...

E OF 120W...
A 1008 MB LOW IS OFF THE COAST OF MEXICO NEAR 18N105W WITH 
SCATTERED MODERATE TO STRONG CONVECTION WITHIN 60 TO 75 NM OF 
LINE FROM 17N105W TO 20N107W. AN UPPER TROUGH EXTENDS ACROSS S 
MEXICO JUST W OF THE GULF OF TEHUANTEPEC SW TO 14N99W. AN UPPER 
HIGH IS ANCHORED S OF EL SALVADOR COVERING THE AREA N OF THE 
ITCZ E OF 94W. THE DIFFLUENCE ALOFT IS ENHANCING CLUSTERS OF 
SCATTERED MODERATE TO ISOLATED STRONG CONVECTION FROM THE ITCZ 
TO INLAND OVER CENTRAL AMERICA AND S MEXICO BETWEEN 89W TO 97W. 
BROAD UPPER RIDGE IS ANCHORED OVER THE DESERT SW EXTENDING S TO 
13N ALONG 108W PROVIDING ENOUGH UPPER LEVEL SHEAR TO DISPLACE 
THE CONVECTION TO THE W OF THE 1008 MB LOW OFF THE COAST OF 
MEXICO. 

W OF 120W...
A SURFACE TROUGH EXTENDS FROM 18N122W TO 10N124W WITH NO 
ASSOCIATED CONVECTION. THE UPPER LOW THAT WAS NEAR 32N124W HAS 
MOVED N OF THE REGION WITH THE UPPER TROUGH BEGINNING TO BE 
DRAWN NORTHWARD AS WELL COVERING THE AREA N OF 25N BETWEEN 121W 
AND 130W. A WEAK UPPER LOW IS JUST N OF THE ITCZ NEAR 12N135W 
COVERING THE AREA S OF 16N W OF 131W. AN UPPER HIGH IS NEAR 
23N135W COVERING THE REMAINDER OF THE AREA W OF 130W. THE ENTIRE 
AREA W OF 125W IS DOMINATED BY MODERATE TO STRONG SUBSIDENCE IN 
THE MID TO UPPER LEVELS WITH A DECK OF LOWER LEVEL STRATOCUMULUS 
CLOUDS COVERING THE AREA N OF 20N FROM THE BAJA PENINSULA TO 
BEYOND 140W. 

$$
PAW