FVXX20 KWBC 121024 VOLCANIC ASH ADVISORY ISSUED: 2004JAN12/1020Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2004/037 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. GEOPHYSICAL INSTITUTE. GUAYAQUIL MWO SIGMET ERUPTION DETAILS: GAS AND ASH EMISSIONS. OBS ASH DATE/TIME: 12/0915Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/220 MOVING TO E 10-15 KNOTS. FCST ASH CLOUD+6H: NOT AVBL FCST ASH CLOUD+12H: NOT AVBL FCST ASH CLOUD+18H: NOT AVBL REMARKS: ASH IS NOT DETECTED IN INFRARED IMAGERY...HOWEVER THIN ASH PLUMES ARE OFTEN ONLY DETECTED IN HIGHER RESOLUTION VISIBLE IMAGERY. THUS WILL CONTINUE ADVISORY AT LEAST UNTIL VISIBLE IMAGERY BECOMES AVAILABLE LATER THIS MORNING. ACCORDING TO UPPER AIR FORECASTS ANY ASH TO FL220 SHOULD MOVE TO THE EAST AT 10-15 KNOTS. NEXT ADVISORY: WILL BE ISSUED BY 2004JAN12/1600Z NNNN