FVXX21 KNES 211548 VOLCANIC ASH ADVISORY ISSUED: 2006APR21/1548Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128 W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2006/228 INFORMATION SOURCE: GOES-12. ERUPTION DETAILS: ASH OBSERVED 20/2129Z OBS ASH DATE/TIME: 21/1515Z OBS ASH CLOUD: FCST ASH CLOUD +6H: 21/2130Z FCST ASH CLOUD +12H: 22/0330Z FCST ASH CLOUD +18H: 22/0930Z REMARKS: NO ASH HAS BEEN DETECTED IN SATELLITE IMAGERY SINCE 20/2129Z. ...MERCKLE NEXT ADVISORY: NO FURTHER ADVISORIES NNNN