FVXX20 KWBC 122030
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 2030 UTC 12 SEPTEMBER 1999 BY THE WASHINGTON VAAC 
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GUAGUA PICHINCHA 99-010 ECUADOR 0.17S 78.60W 
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BACKGROUND:    GUAGUA PICHINCHA (1502-02)
               SUMMIT HEIGHT    15,695FT (4784 M)  
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SOURCES OF INFORMATION:  SIGMET FROM GUAYAQUIL METEOROLOGICAL WATCH
OFFICE...INSTITUTO GEOFISICO ESCUELA POLITECNICA NACIONAL...00 UTC
AVIATION MODEL RUN...GOES-8 VISIBLE INFRARED AND MULTISPECTRAL
IMAGERY.

ERUPTION DETAILS: ERUPTION AT APPROXIMATELY 12/1127 UTC.            
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DETAILS OF ASH CLOUD: NO ASH CAN BE DISCERNED IN SATELLITE IMAGERY
THROUGH 1815 UTC DUE TO DENSE MID AND HIGH LEVEL METEOROLOGICAL
CLOUDS IN THE AREA.  EARLIER A SIGMET FROM GUAYAGUIL HAD INICATED AN
ERUPTION OF GUAGUA PICHINCHA.  THE GEOPHYSICAL INSTITUTE IN QUITO
CONFIRMED THAT A 10 OR 15 MINUTE ERUPTION HAD OCCURRED STARTING AT
1127 UTC. THE INSTITUE INDICATED THAT THE VOLCANO WAS QUIET AT 1400
UTC.  THE INSTITUTE FURTHER REPORTED THAT SUCH PHREATIC EXPLOSIONS
HAVE BEEN OCCURRING FOR THE LAST COUPLE OF WEEKS.  PREVIOUS
ERUPTIONS HAVE RESULTED IN ASHFALL 80 TO 90 KM DOWNWIND.  
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TRAJECTORY: TOWARD THE NORTHWEST AT 20 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.
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THE NEXT MESSAGE WILL BE ISSUED AT 13/0230 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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