FVXX20 KWBC 200630 VOLCANIC ASH ADVISORY ISSUED: 2002OCT20/0630Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2002/499 . INFORMATION SOURCE: GOES-8 IMAGERY. GUAYAQUIL MWO SIGMET. AVN MODEL WINDS FORECAST . ERUPTION DETAILS: ASH OBSERVED AT 0551Z . OBS ASH DATE/TIME: 20/0551Z . OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/FL170 MOV W 10-15 KNOTS. . FCST ASH CLOUD+6H: SEE SIGMETS. . REMARKS: SIGMET INDICATES THAT ASH TO FL165 WAS OBSERVED BY THE GEOPHYSICAL INSTITUTE AT 0551Z. ASH CANNOT BE SEEN IN SATELLITE IMAGERY THROUGH 20/0615Z PROBABLY DUE TO LOW LEVEL WEATHER CLOUDS. . NEXT ADVISORY: NO FURTHER ADVISORIES. . NNNN