FVXX20 KWBC 242358 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 2358 UTC 24 NOV 1999 BY THE WASHINGTON VAAC . GUAGUA PICHINCHA 99-107 ECUADOR 0.17S 78.60W . BACKGROUND: GUAGUA PICHINCHA ECUADOR (1502-02) SUMMIT HEIGHT 15695 FT (4784 M) . SOURCES OF INFORMATION: THE INSTITUTO GEOFISICO IN QUITO...GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. . ERUPTION DETAILS: AN ERUPTION WAS REPORTED AT 24/1733 UTC. . DETAILS OF ASH CLOUD: THE ASH CLOUD THAT WAS PREVIOUSLY DESCRIBED HAS BEEN ENGULFED BY THICK METEOROLOGICAL CLOUDS AND HAS NOT BEEN DETECTABLE FOR SEVERAL HOURS. THE ASH WAS ESTIMATED TO HAVE BEEN BELOW FL330. THE INSTITUTO GEOFISICO REPORTS THE AIRPORT IN QUITO HAS BEEN CLOSED. . TRAJECTORY: 1200 UTC UPPER AIR PATTERS OVER THE VOLCANO ARE VARIABLE AND ANY ASH PRODUCED COULD MOVE IN MANY DIRECTIONS BETWEEN 5 TO 20 KNOTS. . 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/) . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT STATEMENT WILL BE ISSUED BY 25/0600 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN