000
AXPZ20 KNHC 071557
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC WED JUL 07 2010

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.

...ITCZ...
THE ITCZ AXIS IS CENTERED ALONG 10N85W 09N105W 06N115W 10N125W 
10N140W. SCATTERED MODERATE CONVECTION IS FROM 05N TO 08N 
BETWEEN 80W AND 84W. SCATTERED MODERATE TO ISOLATED STRONG 
CONVECTION IS FROM 06N TO 13N BETWEEN 84W AND 90W...AND FROM 14N 
TO 19N BETWEEN 90W AND 100W.

...DISCUSSION...
AN UPPER LEVEL ANTICYCLONE IS CENTERED NEAR 27N125W WITH A RIDGE 
W TO WELL BEYOND 25N140W...AND A RIDGE ALSO EXTENDS E TO 
26N110W. THE UPPER LEVELS ARE VERY DRY W OF 105W. 
   
AN UPPER CYCLONE IS OVER THE DEEP TROPICAL PACIFIC AT 08N139W. 

FURTHER E...AN UPPER ANTICYCLONE IS CENTERED INLAND OVER MEXICO 
NEAR 20N110W WITH SIGNIFICANT UPPER LEVEL MOISTURE FROM 05N TO 
25N BETWEEN 80W AND 105W. THIS FEATURE IS ENHANCING THE 
CONVECTION OVER S MEXICO FROM 14N TO 19N.

A SURFACE RIDGE EXTENDS FROM 30N140W TO NEAR 20N117W. NORTHERLY 
SWELLS ARE DRIVING SEAS UP TO 9 FT OVER THE DISCUSSION WATERS 
N OF 25N BETWEEN 120W AND 138W...AND SHOULD DIMINISH BELOW 8 FT 
BY EARLY THU. 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 FOR THE NEXT 24 HOURS. 

AN EMBEDDED SURFACE TROUGH IS OVER THE EASTERN PACIFIC ALONG 
19N129W 12N129W. NO SIGNIFICANT CONVECTION HAS DEVELOPED NEAR 
THE TROUGH AXIS YET. 

SOUTHERLY WINDS OF 15 TO 20 KT AND CROSS EQUATORIAL SWELL OF 8 
TO 10 FT ARE GENERALLY NOTED OVER THE TROPICAL WATERS S OF 10N.  
THESE WINDS ARE EXPECTED TO GRADUALLY DIMINISH BELOW 20 KT OVER 
THE NEXT FEW DAYS BUT THE SWELL WILL PERSIST. 

$$
FORMOSA