FVXX22 KWBC 210900 VOLCANIC ASH ADVISORY ISSUED 0900 UTC 21 SEP 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-1091 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE...INFRARED...AND MULTISPECTRAL IMAGERY. AVIATION MODEL WIND FORECAST. SEPTEMBER 20 REPORT FROM GEOPHYSICAL INSTITUTE. . ERUPTION DETAILS: ASH EMISSION AT ABOUT 20/1400 UTC. . DETAILS OF ASH CLOUD: NO ASH IS SEEN IN SATELLITE IMAGERY THROUGH 21/0815 UTC POSSIBLY DUE TO THE WEATHER CLOUDS IN THE AREA. AT 20/1445 UTC ASH UP TO ABOUT FL250 WAS OBSERVED IN IMAGERY THROUGH A BREAK IN THE WEATHER CLOUDS. . TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL250 WOULD MOVE TO THE WEST OR SOUTHWEST AT LESS THAN 10 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 21/1500 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. . STREETT . NNNN