FVXX21 KWBC 210930 VOLCANIC ASH ADVISORY ISSUED 0930 UTC 21 AUG 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-978 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. 6 HOUR WIND FORECAST FROM THE 21/0000 UTC AVIATION MODEL. THE GEOPHYSICAL INSTITUTE. . ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS. . DETAILS OF ASH: ASH IS NOT SEEN ON THE CURRENT SATELLITE IMAGERY THROUGH 21/0845 UTC. THE LAST REPORT OF ASH CAME AT 20/2215 UTC FROM THE GEOPHYSICAL INSTITUTE WITH ASH TO FL170. . TRAJECTORY: ASH AT SUMMIT LEVEL WILL MOVE TOWARDS THE WEST-SOUTHWEST AT 10 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 21/1530 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. . WALTER . NNNN