FVXX21 KWBC 171130 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1130 UTC 17 NOV 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-131 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. UPPER-AIR DATA AND REPORTS FROM THE GEOFISICO INSTITUTO. . ERUPTION DETAILS: CONTINUOUS ASH EMISSIONS . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 17/1045 UTC SHOWED THICK CLOUDS OVER THE REGION AND NO DEFINITIVE DETECTION OF ASH. 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 17/1730 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN