000
AXPZ20 KNHC 090344
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC FRI JUL 09 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 
0245 UTC.

...ITCZ...
THE AXIS EXTENDS FROM 10N79W TO 12N100W TO 08N112W TO 12N126W TO 
08N140W. SCATTERED MODERATE CONVECTION IS NOTED WITHIN 180 NM OF 
11N89W AND ALSO WITHIN 60 NM EITHER SIDE OF A LINE FROM 10N100W 
TO 07N113W.
 
...DISCUSSION...
AN UPPER LEVEL ANTICYCLONE IS CENTERED NEAR 27N121W WITH A RIDGE 
W TO WELL BEYOND 28N140W...AND A RIDGE ALSO EXTENDS SE TO NEAR 
20N114W. AN UPPER TROUGH EXTENDS W TO E ALONG 12N140W TO 
06N130W. CONVECTION WAS ENHANCED EARLIER NEAR 07N140W AND 
CURRENTLY ALONG A LOW LEVEL TROUGH EXTENDING FROM 06N121W TO 
13N128W. THE DEBRIS MOISTURE IS EVAPORATING IN THESE SAME AREAS
AS THE UPPER LEVELS ARE VERY DRY N OF 20N W OF 110W AND S OF 20N 
W OF 114W.
   
E TO W UPPER FLOW DOMINATES THE AREA S OF 23N E OF 110W. 
CONVECTION HAS BEEN ENHANCED OVER CENTRAL AMERICA ALONG THE ITCZ 
AS PREVIOUSLY DESCRIBED. THE DEBRIS MOISTURE FROM THESE 
CONVECTIVE AREAS IS SPREADING W OVER THE DISCUSSION AREA N OF 
05N E OF 110W.

A BROAD SURFACE RIDGE DOMINATES THE LOW LEVELS N OF THE THE 
ITCZ. NW WINDS IN THE 15 TO 20 KT RANGE ARE EXPECTED TO CONTINUE 
ALONG THE W COAST OF THE SOUTHERN BAJA PENINSULA S OF 26N 
TONIGHT THEN DIMINISHING LATE FRI.

SOUTHERLY WINDS IN THE 15 TO 20 KT ARE EXPECTED TO CONTINUE OVER 
THE WATERS S OF 10N FOR AT LEAST THE NEXT FEW DAYS. THESE 
SOUTHERLY WINDS...COMBINED WITH SOUTHERLY CROSS EQUATORIAL 
SWELL...ARE RESULTING IN SEAS TO 8 FT OVER THE ENTIRE AREA S OF 
10N W OF 81W.

$$
NELSON