FVXX20 KWBC 301100 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1100 UTC 30 NOV 1999 BY THE WASHINGTON VAAC . GUAGUA PICHINCHA 99-130 ECUADOR 0.17S 78.60W . BACKGROUND: GUAGUA PICHINCHA ECUADOR (1502-02) SUMMIT HEIGHT 15695 FT (4784 M) . SOURCES OF INFORMATION: THE GEOFISICO INSTITUTO IN ECUADOR...GOES-8 INFRARED AND MULTISPECTRAL IMAGERY...UPPER LEVEL WINDS FORECAST FROM AVIATION MODEL...SURFACE REPORTS FROM QUITO . ERUPTION DETAILS: ERUPTION AT 29/1640 UTC . DETAILS OF ASH CLOUD: NO ASH CAN BE SEEN IN SATELLITE IMAGERY THROUGH 1015 UTC. ASH FROM THE 29/1640 UTC ERUPTION BECAME FAINTER AS IT MOVED SOUTH. THIS ASH IS NOW TOO DIFFUSE TO SEE IN MULTISPECTRAL OR INFRARED IMAGERY AGAINST THE BACKGROUND OF LOW AND MID LEVEL WEATHER CLOUDS THAT COVER THE AREA. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ASH FROM FL150 TO FL300 WILL MOVE TOWARD THE SOUTHWEST AT LESS THAN 20 KNOTS. ASH FROM FL320 TO FL450 WILL MOVE SOUTHWARD AT 10 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 AT 30/1700 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN