FVXX20 KWBC 211915 VOLCANIC ASH ADVISORY ISSUED: 2002SEP21/1915Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2002/452 . INFORMATION SOURCE: GOES-8 IMAGERY. GUAYAQUIL MWO SIGMET. AVIATION MODEL WIND FORECAST. . ERUPTION DETAILS: CONTINUOUS ASH EMISSION . OBS ASH DATE/TIME: 21/1845Z . OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/FL230 MOVING W 10-15 KNOTS. . FCST ASH CLOUD+6H: SEE SIGMETS. . REMARKS: THE GEOPHYSICAL INSTITUTE OBSERVED ASH OVER THE VOLCANO AT 1654Z TO FL230. EXTENSIVE CLOUDS COVER THE REGION MAKING IT DIFFICULT TO DETECT ANY ASH AT THIS TIME....KARST . NEXT ADVISORY: WILL BE ISSUED BY 2002SEP22/0115Z. . NNNN