FVXX20 KWBC 311254 VOLCANIC ASH ADVISORY ISSUED: 2003DEC31/1300Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/672 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. GEOPHYSICAL INSTITUTE. ERUPTION DETAILS: CONTINUOUS GAS AND ASH EMISSIONS. OBS ASH DATE/TIME: 31/1215Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/200 MOVING TO WEST 10 KNOTS. FL200/250 MOVING TO NORTHWEST 10-15 KNOTS. FCST ASH CLOUD+6H: NOT AVBL FCST ASH CLOUD+12H: NOT AVBL FCST ASH CLOUD+18H: NOT AVBL REMARKS: MULTILAYERED CLOUDS COVER THE AREA OF THE VOLCANO AND ASH CAN NOT BE DETECTED IN CURRENT SATELLITE IMAGERY. THE GEOPHYSICAL INSTITUTE REPORTS A CONSTANT EMISSION FROM THE VOLCANO OF GASES AND ASH. THE HEIGHT IS ESTIMATED BELOW FL220. NEXT ADVISORY: WILL BE ISSUED BY 2003DEC31/1900Z. NNNN