FVXX20 KWBC 241819 VOLCANIC ASH ADVISORY ISSUED: 2003DEC24/1830Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/644 INFORMATION SOURCE: GOES-12 IMAGERY. MODEL WINDS FORECAST. ERUPTION DETAILS: ASH EMISSIONS OBS ASH DATE/TIME: 24/1745Z 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: IT IS DIFFICULT TO DETECT ASH DUE TO EXTENSIVE CLOUD COVER IN THE VICINITY OF THE VOLCANO. THE GEOPHYSICAL INSTITUTE REPORTED A NEARLY CONSTANT EMISSION OF VAPOR AND ASH THAT WAS MOVING DOWNWIND FROM THE SUMMIT AND ESTIMATED BELOW FL220. NEXT ADVISORY: WILL BE ISSUED BY 2003DEC25/0030Z. NNNN