FVXX20 KWBC 180445
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 0445 UTC 18 OCTOBER 1999 BY THE WASHINGTON VAAC 
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GUAGUA PICHINCHA 99-051 ECUADOR 0.17S 78.60W 
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BACKGROUND:    GUAGUA PICHINCHA (1502-02)
               SUMMIT HEIGHT    15,695 FT (4784 M)  
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SOURCES OF INFORMATION:GEOPHYSICAL INSTITUTE IN QUITO...INFRARED AND
MULTISPECTRAL GOES 8 SATELLITE IMAGERY...AVIATION 18 HOUR FORECAST
FROM 17/1200 UTC MODEL RUN
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ERUPTION DETAILS:  EXPLOSIVE ERUPTION OCCURRED AT 18/0321 UTC.
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DETAILS OF ASH CLOUD: THE GEOPHYSICAL INSTITUTE IN QUITO INDICATED
THAT...BASED ON SEISMIC ACTIVITY...AN EXPLOSIVE ERUPTION OF GUAGUA
PICHINCHA OCCURRED AT 0321 UTC.  SATELLITE IMAGERY THROUGH 0415 UTC
REVEALED A SMALL NARROW PLUME 10 KM (5 NMI) WIDE EXTENDING FROM
0.2S/78.6W TO 0.3S/78.7W.  THIS PLUME WAS ESTIMATED TO BE AT FL320
BASED ON MODEL DATA TAKEN FROM THE 17/1200 UTC RUN. 
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TRAJECTORY: TOWARD THE SOUTHWEST AT 5 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  
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 MESSAGE WILL BE ISSUED AROUND 18/1045Z.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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