FVXX20 KWBC 250755 VOLCANIC ASH ADVISORY ISSUED: 2003AUG25/0800Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/165 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. GUAYAQUIL MWO SIGMET. . ERUPTION DETAILS: ASH ERUPTION STARTED AT 20/1745Z. OBS ASH DATE/TIME: 25/0715Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/140 MOVING W 15 KNOTS. FL160/230 MOVING SW 10 KNOTS. FCST ASH CLOUD+6H: SEE SIGMETS AND VAFTAD. REMARKS: THE FL230 ASH PLUME THAT COULD BE SEEN IN SATELLITE IMAGERY AT 25/0115Z IS NOW TOO THIN TO SEE IN IMAGERY. IN ADDITION THE BRIGHT HOTSPOT OBSERVED EARLIER CAN NO LONGER BE SEEN. . NEXT ADVISORY: WILL BE ISSUED BY 2003AUG25/1400Z. NNNN