FVXX20 KWBC 231655 VOLCANIC ASH ADVISORY ISSUED: 2004JUN23/1655Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2004/305 INFORMATION SOURCE: GUAYAQUIL MWO. GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. GEOPHYSICAL INSTITUTE. ERUPTION DETAILS: EMISSIONS OF ASH AND GAS OBS ASH DATE/TIME: 23/1615Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/FL230 MOVING TO W 10-15 KNOTS. FCST ASH CLOUD +6H: NOT AVBL FCST ASH CLOUD +12H: NOT AVBL FCST ASH CLOUD +18H: NOT AVBL REMARKS: THE LAST OBSERVED ASH BY THE INSTITUTE WAS AT 0209Z. CLOUDS OVER THE VOLCANO MAKE IT DIFFICULT TO DETECT ASH FROM SATELLITE DATA. VAA UPDATED TO ADD STATEMENT ABOUT UPPER AIR WIND FORECASTS ...KARST NEXT ADVISORY: WILL BE ISSUED BY 2004JUN23/2300Z NNNN