FVXX20 KWBC 232315 VOLCANIC ASH ADVISORY ISSUED: 2004APR23/2314Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2004/172 INFORMATION SOURCE: GUAYAQUIL MWO. GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. GEOPHYSICAL INSTITUTE. ERUPTION DETAILS: INITIAL ERUPTION AT 23/1100Z OBS ASH DATE/TIME: 23/2345Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL200 MOVING TO W 5 KNOTS. FCST ASH CLOUD +6H: NOT AVBL FCST ASH CLOUD +12H: NOT AVBL FCST ASH CLOUD +18H: NOT AVBL REMARKS: THE GEOPHYSICAL INSTITUTE REPORTS ASH EMISSIONS DRIFTING TO THE NORTHWEST OF THE SUMMIT. CLOUDS HAVE OBSCURED THE SUMMIT ALL DAY. ... NEXT ADVISORY: WILL BE ISSUED BY 2004APR24/0515Z NNNN