000
AXPZ20 KNHC 102148
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL 
HURRICANE CENTER MIAMI FL
2205 UTC THU AUG 10 2006

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS 
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND 
METEOROLOGICAL ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2145 UTC.

...TROPICAL WAVES...

A TROPICAL WAVE ALONG 129W TO THE N OF 2N HAS MOVED W 12 KT 
DURING THE PAST 24 HOURS. CONVECTION IS ENHANCED ALONG THE ITCZ 
FROM 6N TO 14N WITH BROAD CYCLONIC TURNING NOTED.

A TROPICAL WAVE IS N OF 5N ALONG 96W AND HAS MOVED W AT ABOUT 18 
KT THE PAST 24 HOURS. ONLY A FEW CLUSTERS OF CONVECTION IS NOTED 
WITHIN THE 90 NM EITHER SIDE OF THE ITCZ AXIS.

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 7N79W 12N128W 8N140W. SCATTERED 
MODERATE ISOLATED STRONG FROM 6N TO 17N BETWEEN 89W AND 123W AND 
WITHIN 150 NM EITHER SIDE OF LINE 12N123W 7N140W. 

...DISCUSSION...

AN UPPER ANTICYCLONE IS CENTER3ED NEAR 33N112W WITH A RIDGE 
EXTENDING SW TO A CREST AT 18N139W. TO THE N OF THE RIDGE AN 
UPPER SHORTWAVE IS PASSING TO THE E WITH ITS AXIS EXTENDING S TO 
NEAR 33N132W AT THE MOMENT. 

AN ILL-DEFINED UPPER CYCLONE IS ESTIMATED NEAR 9N110W WITH AN 
INVERTED UPPER TROUGH EXTENDING N TO NEAR 19N109W. ANOTHER UPPER 
CYCLONE IS NOTED NEAR 18N125W AND IS SHIFTING WSW WITH TIME. AN 
UPPER CYCLONE IS NEAR 1N133W AND NOW APPEARS TO BE SHIFTING S 
AND FILLING. BETWEEN THESE CYCLONES...AN UPPER ANTICYCLONE IS 
CENTERED NEAR 17N117W WITH A RIDGE N TO A CREST AT 22N116W. 
CONVECTION IS ENHANCED UNDER THE RIDGE NEAR 16N119W. 

DRY UPPER AIR IS NOTED WITHIN 180 NM EITHER SIDE OF LINE 34N120W 
19N137W. OTHERWISE UPPER DEBRIS MOISTURE ORIGINATING FROM ITCZ 
CONVECTION IS NOTED THROUGHOUT THE TROPICAL AREA N OF 4N E OF
136W.  

AT THE SURFACE...A RIDGE EXTENDS FROM 32N140W SE TO 20N110W. 
BROKEN STRATOCUMULUS CLOUDS ARE NOTED N OF 13N W OF 116W. 

GAPS WINDS...ANOTHER NE SURGE TO 20 KT WAS NOTED AT SUNRISE THIS 
MORNING IN THE GULF OF PAPAGAYO...BUT LATEST SHIP REPORTS 
INDICATE THAT WINDS HAVE DECREASED BELOW 20 KT.
 
$$
NELSON