FVXX20 KWBC 301620 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1620 UTC 30 NOV 1999 BY THE WASHINGTON VAAC . GUAGUA PICHINCHA 99-131 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 SINCE YESTERDAY EVENING ALTHOUGH THERE IS EXTENSIVE METEOROLOGICAL CLOUDS IN THE AREA. THE GEOFISICO INSTITUTO IN QUITO ECUADOR REPROTS NO NEW ASH EMISSIONS SINCE YESTERDAY'S ERUPTION. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY REMAINING ASH 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 SCHEDULED STATEMENT WILL BE A WATCH VAAS ISSUED AT 01/1700 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN