FVXX21 KWBC 280100 VOLCANIC ASH ADVISORY ISSUED 0100 UTC 28 AUG 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-1005 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. WINDS FORECAST FROM THE AVIATION MODEL. GEOPHYSICAL INSTITUTE REPORT. . ERUPTION DETAILS: GAS AND OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 28/0015 UTC SHOWED EXTENSIVE CLOUD COVER OVER THE VOLCANO AND SURROUNDING REGIONS PRECLUDING THE DETECTION OF ASH. THE GEOPHYSICAL INSTITUTE OBSERVED ASH TO FL200 ON THE MORNING OF THE 27TH AND AGAIN REPORTED ASH OVER THE VOLCANO AT 27/2058 UTC. . TRAJECTORY: ANY ASH FROM SUMMIT LEVEL TO FL200 WILL MOVE TOWARD THE WEST AT ABOUT 10 TO 15 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 28/0700 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. . CLARK . NNNN