FVXX20 KWBC 231828 VOLCANIC ASH ADVISORY ISSUED: 2003DEC23/1830Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/640 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. GUAYAQUIL MWO SIGMET. ERUPTION DETAILS: ASH EMISSIONS OBS ASH DATE/TIME: 23/1715Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/250 MOVING TO W 10-20 KNOTS. FCST ASH CLOUD+6H: NOT AVBL FCST ASH CLOUD+12H: NOT AVBL FCST ASH CLOUD+18H: NOT AVBL REMARKS: NO ASH CAN BE DETECTED IN IMAGERY THROUGH 1715Z PROBABLY DUE TO CLOUD COVER. NEXT ADVISORY: WILL BE ISSUED BY 2003DEC24/0030Z. NNNN