FVXX20 KNES 211910 VOLCANIC ASH ADVISORY ISSUED: 20070821/1910Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128 W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2007/513 INFORMATION SOURCE: GOES-12. GFS WINDS. TUNGURAHUA OBSERVATORY ERUPTION DETAILS: CONTINUING EMISSIONS OBS ASH DATE/TIME: 21/1845Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL200 MOVING TO W 10-15 KNOTS. FCST ASH CLOUD +6H: 22/0100Z FCST ASH CLOUD +12H: 22/0700Z FCST ASH CLOUD +18H: 22/1300Z REMARKS: THE TUNGURAHUA OBSERVATORY REPORTS THAT EMISSIONS HAVE CONTINUED TO OCCUR BUT DUE TO EXTENSIVE CLOUD COVER A HEIGHT IS DIFFICULT TO DETERMINE. THE CLOUDS OBSCURE ANY ASH IN IMAGERY. ... NEXT ADVISORY: WILL BE ISSUED BY 20070822/0115Z