FVXX20 KWBC 291530 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1530 UTC 29 NOV 1999 BY THE WASHINGTON VAAC . GUAGUA PICHINCHA 99-125 ECUADOR 0.17S 78.60W . BACKGROUND: GUAGUA PICHINCHA ECUADOR (1502-02) SUMMIT HEIGHT 15695 FT (4784 M) . SOURCES OF INFORMATION: DAILY REPORT FROM THE GEOFISICO INSTITUTO IN ECUADOR...GOES-8 VISIBLE AND INFRARED AND MULTISPECTRAL IMAGERY... . ERUPTION DETAILS: LAST ERUPTION OCCURRED AT 28/0215 UTC. . DETAILS OF ASH CLOUD: NO ASH IS DETECTED IN SATELLITE IMAGERY THROUGH 29/1445 UTC. SURFACE REPORTS FROM QUITO MENTION LOW LEVEL VOLCANIC ASH FROM THE SOUTHEAST TO SOUTH TO SOUTHWEST OF THE AIRPORT MOVING TOWARDS THE NORTHWEST. . THE GEOFISCO INSTITUTO THOUGH CONTINUES TO REPORT THAT THE VOLCANO IS UNSTABLE AND THAT AN ERUPTION COULD OCCUR AT ANY TIME. . TRAJECTORY: ACCORDING TO UPPER AIR PATTERNS ANY VOLCANIC ASH FROM FL150 TO FL300 WILL MOVE TOWARDS THE WEST AT 15 KTS. . 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 29/2130 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . ORRISON . NNNN