FVXX20 KWBC 181821 VOLCANIC ASH ADVISORY ISSUED: 2004JUN18/1820Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2004/293 INFORMATION SOURCE: GUAYAQUIL MWO. GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. GEOPHYSICAL INSTITUTE. ERUPTION DETAILS: EMISSIONS OF ASH AND GASES OBS ASH DATE/TIME: 18/1745Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL250 MOVING TO W 10-20 KNOTS. FCST ASH CLOUD +6H: NOT AVBL FCST ASH CLOUD +12H: NOT AVBL FCST ASH CLOUD +18H: NOT AVBL REMARKS: OCCASIONAL DARK CLOUDS CAN BE SEEN POPPING THROUGH THE WEATHER CLOUDS IN THE AREA WHICH COULD POSSIBLY BE ASH CLOUDS BUT NO OTHER SIGNS OF ASH CAN CURRENTLY BE SEEN ON SATELLITE IMAGERY. LAST GUAYAQUIL SIGMET INDICATED ASH TO FL210...BUT WILL LEAVE HEIGHT A BIT HIGHER BASED ON PREVIOUS SIGMETS ...GALLINA NEXT ADVISORY: WILL BE ISSUED BY 2004JUN19/0015Z NNNN