FVXX20 KWBC 250022 VOLCANIC ASH ADVISORY ISSUED: 2003DEC25/0030Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/645 INFORMATION SOURCE: GOES-12 IMAGERY. MODEL WINDS FORECAST. GEOPHYSICAL INSTITUTE. ERUPTION DETAILS: ASH EMISSIONS OBS ASH DATE/TIME: 24/2345Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/250 MOVING TO W 10-15 KNOTS. FCST ASH CLOUD+6H: NOT AVBL FCST ASH CLOUD+12H: NOT AVBL FCST ASH CLOUD+18H: NOT AVBL REMARKS: SATELLITE IMAGERY THROUGH 24/2345Z SHOWS CLOUDS OBSCURING THE VOLCANO. SOME PATTERNS IN MULTISPECTRAL IMAGERY ARE SUSPECT AND COULD BE ASH. THE GEOPHYSICAL INSTITUTE REPORTED A SLIGHT DECREASE IN ACTIVITY AND THAT THE MOUNTAIN IS OBSCURED BY CLOUDS AND DRIZZLE. NEXT ADVISORY: WILL BE ISSUED BY 2003DEC25/0630Z. NNNN