FVXX20 KWBC 251724 VOLCANIC ASH ADVISORY ISSUED: 2003DEC25/1830Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/648 INFORMATION SOURCE: GOES-12 IMAGERY. MODEL WINDS FORECAST. ERUPTION DETAILS: ASH EMISSIONS OBS ASH DATE/TIME: 25/1745Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/270 MOVING TO W 15-20 KNOTS. FCST ASH CLOUD+6H: NOT AVBL FCST ASH CLOUD+12H: NOT AVBL FCST ASH CLOUD+18H: NOT AVBL REMARKS: EXTENSIVE CLOUDS IN SATELLITE IMAGERY MAKES IT DIFFICULT TO DETECT ASH. ASH WAS OBSERVED TO FL270 BY THE GEOPHYSICAL INSTITUTE AT 1625Z. NEXT ADVISORY: WILL BE ISSUED BY 2003DEC26/0030Z. NNNN