FVXX20 KWBC 121940 VOLCANIC ASH ADVISORY ISSUED: 2003DEC12/2000Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/601 INFORMATION SOURCE: GOES-12 IMAGERY. GUAYAQUIL MWO SIGMET. ERUPTION DETAILS: ASH EMISSIONS OBS ASH DATE/TIME: 12/1915Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/FL220 MOVING TO S 5-10 KNOTS. FCST ASH CLOUD+6H: NOT AVBL FCST ASH CLOUD+12H: NOT AVBL FCST ASH CLOUD+18H: NOT AVBL REMARKS: DAYTIME THUNDERSTORMS HAVE BEEN DEVELOPING OVER THE VOLCANO REGION MAKING ASH DETECTION NEARLY IMPOSSIBLE AT THIS TIME. GFS MODEL WINDS FORECAST DO NOT APPEAR TO HAVE A GOOD HANDLE ON WIND INFORMATION AT THE ASH CLOUD LEVEL. CLOUDS IN THE AREA APPEAR TO HAVE MORE OF A SOUTHWARD MOVEMENT NEXT ADVISORY: WILL BE ISSUED BY 2003DEC13/0200Z. NNNN