000
AXPZ20 KNHC 080945
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC FRI MAY 08 2009

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 
0900 UTC.

...ITCZ...
AXIS ALONG 07N77W TO 06N93W TO 07N107W TO 03N125W TO 04N140W.  
SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 90 NM OF 
AXIS FROM 80W TO 94W AND WITHIN 120 NM OF OF AXIS FROM 105W TO 
122W.  SCATTERED MODERATE CONVECTION WITHIN 240 NM N OF AXIS W 
OF 123W.

...DISCUSSION...
LOW LATITUDES MOISTURE INCREASE ADVECTED AROUND SOUTHERN 
PERIPHERY OF UPPER LEVEL CYCLONIC VORTEX AT 18N116W HAS MADE 
ITCZ MORE ACTIVE THAN IN PAST WEEKS.  MODERATE UPPER LEVEL 
DIFFLUENT FLOW SE QUADRANT OF VORTEX ENHANCES CONVECTION 
UPLIFTED BY WEAK SURFACE TROUGH RUNNING ALONG 105W.  MOISTURE 
SWATH REACHING SOUTHWESTERN PARTS OF MEXICO BUT NO LIFTING 
MECHANISM THERE PRECLUDES SIGNIFICANT CONVECTION DEVELOPMENT. 

HIGH PRES CENTER WELL N OF BASIN PRODUCING GALE FORCE WINDS 
ALONG CALIFORNIA COAST HAS 20-25 KT WINDS SPREADING AS FAR S AS 
24N INTO E PAC WATERS AND 9-10 FT SWELLS FARTHER S TO 20N.  
RIDGE EXTEND TO 10N110W PROMOTES FRESH TRADES FROM 10N-18N BUT 
QUICKLY DIMINISH AS HIGH PRES WEAKENS AND MOVES E.  AREA UNDER 
RIDGE IS DRY AND CLOUD FREE IN MID/UPPER LEVELS.   

PATTERN NOT EXPECTED TO CHANGE SIGNIFICANTLY NEXT 48 HRS.

$$
WALLY BARNES