FVXX22 KWBC 202040 VOLCANIC ASH ADVISORY ISSUED 2040 UTC 20 SEP 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-1089 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE...INFRARED...AND MULTISPECTRAL IMAGERY. 1200 UTC AVIATION MODEL FORECAST DATA. . ERUPTION DETAILS: ASH EMISSION AT APPROX 1400 UTC. . DETAILS OF ASH CLOUD: GOES-8 SATELLITE IMAGERY DOES NOT INDICATE ANY SIGNS OF ASH. THE POSSIBLE ASH CLOUD OBSERVED EARLIER HAS DISSIPATED. ANY ASH EMISSIONS CURRENTLY UNDETECTED DUE TO CLOUDINESS SHOULD BE AT OR BELOW FL250. . TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL250 SHOULD MOVE TO THE WEST AT NEAR 10 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 21/0300 UTC. . REAL TIME SATELLITE IMAGERY AND VOLCANIC ASH ADVISORIES 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/). . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . ORRISON . NNNN