FVXX20 KWBC 210400 VOLCANIC ASH ADVISORY ISSUED: 2002JUL21/0400Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2002/338 . INFORMATION SOURCE: GOES-8 IMAGERY. AVN MODEL WINDS FORECAST. GUAYAQUIL MWO SIGMET. GEOPHYSICAL INSTITUTE. . ERUPTION DETAILS: NIL . OBS ASH DATE/TIME: 21/0315Z . OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/FL220 MOVING SE 10 TO 15 KTS. . FCST ASH CLOUD+6H: SEE SIGMETS. . REMARKS: THE ASH PLUME OBSERVED EARLIER MOVING TO THE SOUTHEAST IS NO LONGER DETECTABLE IN IMAGERY. KARST . NEXT ADVISORY: NO FURTHER ADVISORIES . NNNN