FVXX21 KWBC 280700 VOLCANIC ASH ADVISORY ISSUED 0700 UTC 28 AUG 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-1006 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 UNKNOWN ALTITUDE 28/0434 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 28/1300 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