FVXX20 KWBC 120401 VOLCANIC ASH ADVISORY ISSUED: 2004JAN12/0400Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2004/036 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. GEOPHYSICAL INSTITUTE. GUAYAQUIL MWO SIGMET ERUPTION DETAILS: GAS AND ASH EMISSIONS. OBS ASH DATE/TIME: 12/0315Z 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: WIDESPREAD CLOUDINESS IN THE VICINITY OF THE VOLCANO HAS MADE IT DIFFICULT TO DETECT ASH. ACCORDING TO UPPER AIR FORECASTS ANY ASH TO FL220 SHOULD MOVE TO THE EAST AT 10-15 KNOTS. NEXT ADVISORY: WILL BE ISSUED BY 2004JAN12/1000Z NNNN