FVXX20 KWBC 171115 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1115 UTC 17 NOV 1999 BY THE WASHINGTON VAAC . GUAGUA PICHINCHA 99-091 ECUADOR 0.17S 78.60W . BACKGROUND: GUAGUA PICHINCHA ECUADOR (1502-02) SUMMIT HEIGHT 15695 FT (4784 M) . SOURCES OF INFORMATION: GEOLOGICAL PERSONNEL IN QUITO...GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. UPPER AIR WIND REPORTS FROM THE INSTITUTO GEOFISICO IN QUITO. . ERUPTION DETAILS: THE GEOFISICO INSTITUTO REPORTED A SIGNIFICANT ERUPTION AROUND 17/0955 UTC. . DETAILS OF ASH CLOUD: DUE TO DARKNESS AND CLOUDS THERE IS NO HEIGHT ESTIMATION FROM THE GROUND. DUE TO CLOUD COVERING THE AREA THERE IS NO DETECTION OF ASH IS SATELLITE IMAGERY THROUGH 1045 UTC. THE SURFACE OBSERVATION FROM QUITO REPORTS AN ASH CLOUD FROM THE VOLCANO MOVING WEST. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST ASH AROUND AND BELOW FL200 WILL MOVE TO THE SOUTH AROUND 10 KNOTS AND ABOVE FL200 TO FL350 ASH WILL MOVE WEST AT 10 TO 25 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. . THE NEXT STATEMENT WILL BE ISSUED BY 17/1700 UTC UNLESS CONDITIONS CHANGE. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN