FVXX20 KWBC 281600 VOLCANIC ASH ADVISORY ISSUED: 2002SEP28/1600Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2002/468 . INFORMATION SOURCE: GOES-8 IMAGERY. AVN WINDS FORECAST. GEOPHYSICAL INSTITUTE. GUAYAQUIL SIGMET . ERUPTION DETAILS: EXHALATION AT 28/1524Z . OBS ASH DATE/TIME: 28/1515Z . OBS ASH CLOUD: ASH NOT IDENTIFIABLE IN SATELLITE IMAGERY. WINDS FL100/FL200 MOVING W 10 TO 15 KNOTS. . FCST ASH CLOUD+6H: SEE SIGMETS . REMARKS: ASH WAS NOT DETECTED IN SATELLITE IMAGERY THROUGH 1515Z DUE TO CLOUDS IN THE VICINITY. KARST . NEXT ADVISORY: WILL BE ISSUED BY 2002SEP28/2200Z. . NNNN