FVXX21 KWBC 170535 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0535 UTC 17 NOV 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-130 ECUADOR 1.47S 78.44W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. AVIATION MODEL UPPER-AIR DATA. . ERUPTION DETAILS: CONTINUOUS ASH EMISSIONS . DETAILS OF ASH: THE FAINT ASH PLUME SEEN EARLIER THIS EVENING CAN NO LONGER BE DETECTED IN SATELLITE IMAGERY THROUGH 17/0445 UTC. THAT ASH WAS ABOVE SOME OTHER LOWER LEVEL CLOUD COVER AND BECAME TO FAINT TO DETECT AROUND 17/0245 UTC. ASH MAY BE MIXED IN WITH THE CLOUDS. . TRAJECTORY: ANY ASH BELOW FL300 WOULD MOVE TOWARD THE NORTHWEST AT 15 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 AND VAFTAD. . THE NEXT STATEMENT WILL BE ISSUED BY 17/1130 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN