FVXX20 KWBC 121820 VOLCANIC ASH ADVISORY ISSUED: 2004APR12/1820Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2004/157 INFORMATION SOURCE: GOES-12 IMAGERY. ERUPTION DETAILS: PLUME SEEN STARTING AT 12/1145Z OBS ASH DATE/TIME: NIL OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. FCST ASH CLOUD +6H: NOT AVBL FCST ASH CLOUD +12H: NOT AVBL FCST ASH CLOUD +18H: NOT AVBL REMARKS: ANY REMAINING ASH IS NOW TOO THIN TO SEE IN SATELLITE IMAGERY. NEXT ADVISORY: NO FURTHER ADVISORIES NNNN