FVXX21 KWBC 270900 VOLCANIC ASH ADVISORY ISSUED 0900 UTC 27 AUG 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-1002 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: ASH HAS NOT SEEN IN SATELLITE IMAGERY THROUGH 27/0815 UTC ALTHOUGH THERE ARE SOME CLOUDS PRESENT. THE GEOPHYSICAL INSTITUTE REPORTED ASH OVER THE VOLCANO AT 27/0455 UTC AND REPORTED SEVERAL EXPLOSIONS DURING THIS PAST DAY WITH THE MAXIMUM REPORTED HEIGHT OF THE ASH BEING FL250. . TRAJECTORY: ANY ASH AT SUMMIT TO FL250 WOULD MOVE TOWARDS THE WEST AT ABOUT 15 TO 25 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 27/1500 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