FVXX20 KWBC 300500 
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 0500 UTC 30 NOV 1999 BY THE WASHINGTON VAAC
...CORRECTION TO NEXT STATEMENT TIME... 
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GUAGUA PICHINCHA 99-129      ECUADOR 0.17S 78.60W 
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BACKGROUND:    GUAGUA PICHINCHA ECUADOR (1502-02)
               SUMMIT HEIGHT    15695 FT (4784 M)  
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SOURCES OF INFORMATION: THE GEOFISICO INSTITUTO IN ECUADOR...GOES-8
INFRARED AND MULTISPECTRAL IMAGERY...UPPER LEVEL WINDS FORECAST FROM
AVIATION MODEL 
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ERUPTION DETAILS: ERUPTION AT 29/1640 UTC...GEOFISICO INSTITUTO
REPORTED THAT THE EVENT GENERATED AN 8 KM HIGH ASH CONTAINING COLUMN 
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DETAILS OF ASH CLOUD: NO ASH CAN BE SEEN IN MULTISPECTRAL OR
INFRARED SATELLITE IMAGERY THROUGH 0415 UTC. ASH FROM THE 1640 UTC
ERUPTION BECAME FAINTER AS IT MOVED SOUTH.  THE ASH COULD STILL BE
SEEN IN THE LAST VISIBLE SATELLITE IMAGES OF THE DAY...AT 29/2215
UTC THE ASH COVERED A LARGE AREA SOUTH OF THE VOLCANO WITH ITS
LEADING EDGE 192 KM (104NMI) SOUTH OF THE VOLCANO AT THAT TIME.  ASH
HEIGHT WAS ESTIMATED TO BE BELOW FL300 AT THAT TIME.  
   CURRENTLY USING MULTISPECTRAL IMAGERY THE ASH IS NOW TOO DIFFUSE
TO SEE AGAINST THE BACKGROUND OF LOW WEATHER CLOUDS OVER THE AREA.  
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TRAJECTORY: ASH OBSERVED EARLIER MOVED SOUTH AT ABOUT 20 KNOTS.
UPPER AIR PATTERNS SUGGEST THAT ASH FROM FL150 TO FL300 WILL MOVE
WESTWARD OR SOUTHWEST AT LESS THAN 20 KTS. ASH FROM FL300 TO FL450
WILL MOVE SOUTHWARD AT 10 TO 15 KTS.  
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REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC ASH
ADVISORY STATEMENTS OFTEN ACCOMPANIED BY A MAP DEPICTING ASH
LOCATION ARE AVAILABLE AT INTERNET URL ADDRESS  
http://www.ssd.noaa.gov/VAAC/washington.html
(all lower case except /VAAC/)
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OUTLOOK:  SEE SIGMETS AND VAFTAD
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THE NEXT STATEMENT WILL BE ISSUED AT 30/1100 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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