000
AXPZ20 KNHC 030307
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC TUE AUG 03 2010

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 
0300 UTC.

...ITCZ...
AXIS ALONG 10N86W TO 08N97W TO 08N114W TO 09N130W TO 11N136W.  
SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 240 NM N  
OF AXIS FROM 101W TO 114W AND WITHIN 90 NM OF AXIS W OF 120W.    

...DISCUSSION...
UPPER LEVEL ANTICYCLONE AT 18N136W HAS CREST LEAN NE TO 32N13W. 
SHARP LARGE AMPLITUDE TROUGH ALONG 122W IS TRAPPED BETWEEN THAT 
RIDGE AND EXTENSIVE DOWNSTREAM RIDGE OVER CENTRAL PLAINS.  VERY 
DRY AIR MASS N OF 14N W OF 120W WHILE TROPICAL MOISTURE ALONG 
ITCZ IS PLENTIFUL THANKS TO LONG STRETCH OF EASTERLIES ON 
SOUTHERN PERIPHERY OF EXTENSIVE RIDGE.  BROAD AREA OF MODERATE 
DIFFLUENCE ALOFT IN SW QUADRANT OF RIDGE ENHANCING DEEP 
CONVECTION AROUND WEAK LOW PRES 1007 MB AT 09N106W.  

ELSEWHERE AT THE SURFACE...
ABOVE MENTIONED LOW PRES HAS WEAK SURFACE TROUGH EXTEND TO 
13N103W.  FRESH SW BREEZE IN SE QUADRANT OF LOW PRES BUILDS SEAS 
TO 8 FT. 

BROAD HIGH PRES CENTER 1022 MB WELL N OF BASIN HAS RIDGE EXTEND 
SW TO 18N120W.  WEAK TROUGH FORMED ALONG 123W FROM 08N TO 13N 
SQUEEZE PRES GRADIENT NEXT 36-48 HRS AS IT DRIFTS W INCREASING 
NE TRADES W OF 132W.  

SOUTHERLY CROSS EQUATORIAL SWELLS CONTINUE TO AFFECT BASIN S OF 
10N AND SPREAD FURTHER N BEYOND FORECAST PERIOD.

$$
WALLY BARNES