FVXX20 KWBC 091757 VOLCANIC ASH ADVISORY ISSUED: 2004MAR09/1800Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2004/147 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. ERUPTION DETAILS: VENTING OF GASES AND ASH. OBS ASH DATE/TIME: 09/1715Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/200 MOVING TO NW 10-20 KNOTS. FCST ASH CLOUD+6H: NOT AVBL FCST ASH CLOUD+12H: NOT AVBL FCST ASH CLOUD+18H: NOT AVBL REMARKS: IT IS DIFFICULT TO DETECT ASH DUE TO EXTENSIVE CLOUDS OVER THE VOLCANO....WALTER NEXT ADVISORY: WILL BE ISSUED BY 2004MAR10/0000Z. NNNN