FVXX20 KWBC 261915 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1915 UTC 26 NOV 1999 BY THE WASHINGTON VAAC . GUAGUA PICHINCHA 99-117 ECUADOR 0.17S 78.60W . BACKGROUND: GUAGUA PICHINCHA ECUADOR (1502-02) SUMMIT HEIGHT 15695 FT (4784 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE AND MULTISPECTRAL IMAGERY..REPORTS AND WINDS ALOFT INFORMATION FROM THE GEOFISICO INSTITUTO ...12 UTC AVIATION MODEL WIND FORECAST...SURFACE REPORTS FROM QUITO . ERUPTION DETAILS: AN ERUPTION OCCURRED AT 26/0127 UTC. . DETAILS OF ASH CLOUD: ASH FROM THE LATEST ERUPTION AT 0127 UTC IS NO LONGER DETECTED IN SATELLITE IMAGERY. SURFACE OBSERVATIONS FROM QUITO ARE REPORTING THAT VOLCANIC ASH IS BEING STIRRED UP BY WIND. . TRAJECTORY: IF THERE IS ANY ASH IS IN THE VICINITY OF THE SUMMIT UP TO FL250 IT WOULD MOVE TO THE NORTHEAST AT 10 KTS. ASH BETWEEN FL250 AND FL420 WOULD MOVE WEST AT 20KTS. . 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 A WATCH VAAS ISSUED BY 27/1700 UTC UNLESS CONDITIONS CHANGE. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN