FVXX20 KWBC 210959 VOLCANIC ASH ADVISORY ISSUED: 2003AUG21/1000Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/149 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. ERUPTION DETAILS: ASH ERUPTION STARTED AT 20/1745Z OBS ASH DATE/TIME: 21/0845Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/200 MOVING SW 5-10 KNOTS. FCST ASH CLOUD+6H: SEE SIGMETS. REMARKS: ALTHOUGH ASH COULD NOT BE DETECTED IN SATELLITE IMAGERY THROUGH 0845Z A DISTINCT HOT SPOT WAS READILY DISCERNIBLE. TURK NEXT ADVISORY: WILL BE ISSUED BY 2003AUG21/1600Z. NNNN