FVXX21 KWBC 210830 VOLCANIC ASH ADVISORY ISSUED 0830 UTC 21 OCT 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-1164 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. SIX HOUR WIND FORECAST FROM THE 21/0000 UTC AVIATION MODEL. THE GEOPHYSICAL INSTITUTE. . ERUPTION DETAILS: THE GEOPHYSICAL INSTITUTE REPORTED AN ASH ERUPTION AT 1940 UTC. . DETAILS OF ASH CLOUD: THE GEOPHYSICAL INSTITUTE REPORTED ASH OVER THE VOLCANO AT 21/0538 UTC. SATELLITE IMAGERY THROUGH 21/0745 UTC CONTINUES TO SHOW NO DISCERNABLE ASH PLUME ALTHOUGH THERE ARE LOW AND MIDDLE LAYER CLOUDS IN THE VICINITY OF THE SUMMIT. . TRAJECTORY: ANY ASH BETWEEN THE SUMMIT AND FL270 WILL MOVE TOWARDS THE WEST OR NORTHWEST AT 10 TO 15 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED AROUND 21/1430 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. . . NNNN