FVXX20 KWBC 030325 
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 0325 UTC 03 DEC 1999 BY THE WASHINGTON VAAC
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GUAGUA PICHINCHA 99-135     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 ABOUT 03/0300 UTC 
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DETAILS OF ASH CLOUD: THE GEOFISICO INSTITUTO IN ECUADOR REPORTS AN
ADDITIONAL ERUPTION HAS OCCURRED AROUND 03/0330 UTC.  THIS ERUPTION
IS SEISMOLOGICALLY LARGER THAN THE ONE AT 02/2230 UTC AND HAS
PRODUCED BOTH A VERTICAL ASH PLUME AND A PYROCLASTIC FLOE AWAY FROM
THE VOLCANO.  ALTHOUGH WAS DIFFICULT TO SEE THE DIRECTION OR HEIGHT
OF THE ASH PLUME DUE TO CLOUDS AND RAIN THE  GEOFISICO INSTITUTO
SUSPECTS THE PLUME IS MOVING WEST.  SATELLITE IMAGERY THROUGH 0245
UTC DOES SHOW AN AREA OF ASH IN THE IMMEDIATE VICINITY OF THE
VOLCANO AND TO WITHIN 14 KM (8 NMI) TO THE WEST AND SOUTH.
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TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH BETWEEN FL100
AND FL200 WOULD MOVE IN A SOUTHWARD AT ABOUT 4 KNOTS.  ANY ASH
BETWEEN FL200 AND FL300 WOULD MOVE WEST TO NORTHWEST AT 5 TO 10
KNOTS.
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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
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....EFFECTIVE JANUARY 3 2000 AT 0000 UTC... ALL REFERENCES TO
LATITUDE AND LONGITUDE IN VOLCANIC ASH ADVISORY STATEMENTS WILL BE
IN DEGREES AND MINUTES OF A DEGREE. EXAMPLE...  16.70N 62.20W  WILL
BE  1642N6212W 
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THE NEXT STATEMENT WILL BE ISSUED AS SOON AS ADDITIONAL IMAGERY IS
AVAILABLE FOR DETERMINATION OF HEIGHT AND DIRECTION.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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