FVXX21 KWBC 210330 VOLCANIC ASH ADVISORY ISSUED 0330 UTC 21 AUG 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-977 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 20/1800 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 21/0245 UTC. THE LAST REPORT OF ASH CAME FROM THE GEOPHYSICAL INSTITUTE WITH ASH TO FL170. . TRAJECTORY: ASH AT SUMMIT LEVEL WILL MOVE TOWARDS THE WEST AT 10 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 21/0930 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