FVXX20 KWBC 231718 VOLCANIC ASH ADVISORY ISSUED: 2004APR23/1718Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2004/171 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. ERUPTION DETAILS: ERUPTION AT 23/1110Z. OBS ASH DATE/TIME: 23/1645Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/FL220 MOVING TO W 5-10 KNOTS. FCST ASH CLOUD +6H: NOT AVBL FCST ASH CLOUD +12H: NOT AVBL FCST ASH CLOUD +18H: NOT AVBL REMARKS: ASH COULD NOT BE DETECTED IN SATELLITE IMAGERY THROUGH 1645Z DUE TO EXTENSIVE CLOUDINESS. ...TURK NEXT ADVISORY: WILL BE ISSUED BY 2004APR23/2315Z NNNN