FVXX20 KWBC 261956 VOLCANIC ASH ADVISORY ISSUED: 2003AUG26/2000Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/171 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. GUAYAQUIL MWO SIGMET. . ERUPTION DETAILS: ASH ERUPTION STARTED AT 20/1745Z. OBS ASH DATE/TIME: 26/1915Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/FL270 MOVING W 10-15 KNOTS. FCST ASH CLOUD+6H: SEE SIGMETS AND VAFTAD. REMARKS: ASH CAN NOT BE SEEN IN THE CURRENT SATELLITE IMAGERY THROUGH 26/1915Z..HOWEVER A SURFACE REPORT FROM STATION SERB INDICATES ASH FROM THE SUMMIT TO FL240. IN ADDITION THE ASH VISIBLE EARLIER THIS MORNING IS NO LONGER SEEN IN THE IMAGERY....WALTER NEXT ADVISORY: WILL BE ISSUED BY 2003AUG27/0200Z. NNNN