FVXX21 KWBC 211530 VOLCANIC ASH ADVISORY ISSUED 1530 UTC 21 AUG 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-979 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY. WIND FORECAST FROM THE AVIATION MODEL. THE GEOPHYSICAL INSTITUTE. . ERUPTION DETAILS: GAS AND OCCASIONAL ASH EMISSIONS. THE MOST RECENT EMISSIONS WERE AT ABOUT 1100 UTC. . DETAILS OF ASH: ASH IS NOT SEEN ON THE CURRENT SATELLITE IMAGERY THROUGH 21/1445 UTC. THE GEOPHYSICAL INSTITUTE REPORTS SMALL EMISSIONS OF WATER VAPOR OCCURRED ABOUT 11 UTC BUT NO ASH WAS SEEN. 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 AT ABOUT 15 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 21/2130 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