FVXX20 KWBC 250800 VOLCANIC ASH ADVISORY ISSUED: 2003SEP25/0800Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/283 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. GUAYAQUIL MWO SIGMETS ERUPTION DETAILS: SERIES OF EMISSIONS STARTING AT 21/2345Z OBS ASH DATE/TIME: 25/0715Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/240 MOVING W 10-15 KNOTS. FCST ASH CLOUD+6H: SEE SIGMETS. REMARKS: ASH CANNOT BE DETECTED IN SATELLITE IMAGERY THROUGH 25/0715Z. THE MOST RECENT KNOWN ASH OBSERVATION WAS AT 0701Z WHEN THE GEOPHYSICAL INSTITUTE REPORTED ASH TO FL240. NEXT ADVISORY: WILL BE ISSUED BY 2003SEP25/1400Z. NNNN