FVXX20 KWBC 310049 VOLCANIC ASH ADVISORY ISSUED: 2003DEC31/0100Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/670 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST ERUPTION DETAILS: CONTINUOUS GAS AND ASH EMISSIONS. OBS ASH DATE/TIME: 31/0015Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/250 MOVING TO NE 10-15 KNOTS. FCST ASH CLOUD+6H: NOT AVBL FCST ASH CLOUD+12H: NOT AVBL FCST ASH CLOUD+18H: NOT AVBL REMARKS: IT IS DIFFICULT TO DETECT ASH DUE TO CLOUD COVER IN THE VICINITY OF THE VOLCANO. ANY ASH TO FL250 SHOULD MOVE TO THE NE AT 10-15 KNOTS. NEXT ADVISORY: WILL BE ISSUED BY 2003DEC31/0700Z. NNNN