FVXX20 KWBC 111000
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VOLCANIC ASH ADVISORY STATEMENT 
ISSUED 1000 UTC 11 DEC 1999 BY THE WASHINGTON VAAC
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GUAGUA PICHINCHA 99-149         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 GEOPHYSICAL INSTITUTE IN ECUADOR...QUITO
SURFACE OBSERVATION...GOES-8 INFRARED AND MULTISPECTRAL IMAGERY... 
U.S. NUMERICAL MODEL WIND FORECAST.
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ERUPTION DETAILS: EXPLOSION AT 11/0734 UTC.
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DETAILS OF ASH CLOUD: A SURFACE OBSERVATION FROM QUITO INDICATED
THAT THE GEOPHYSICAL INSTITUTE NOTED ANOTHER EXPLOSION OF GUAGUA
PICHINCHA AT 0734 UTC.  SATELLITE IMAGERY CONFIRMED THAT A SMALL ASH
CLOUD WAS PRODUCED AND WAS QUICKLY DISSIPATING WHILE MOVING TOWARDS
THE WEST.  THE ASH CLOUD COVERED A 10 KM (5 NMI) RADIUS AROUND
0.2S/79.1W AT 0915 UTC AND WAS ESTIMATED AT FL250.
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TRAJECTORY: TOWARDS THE WEST AT 15 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 AND VAFTAD.
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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 BY 11/1600 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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TURK
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