FVXX20 KWBC 311123 CCA VOLCANIC ASH ADVISORY-CORRECTION ISSUED: 2003AUG31/1125Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/190 INFORMATION SOURCE: GOES-12 IMAGERY. ERUPTION DETAILS: ONGOING ERUPTION SINCE 20/1745Z. OBS ASH DATE/TIME: 31/0815Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE IN SATELLITE DATA. WINDS SFC/FL270 MOVING SW TO W 10-15 KNOTS. FCST ASH CLOUD+6H: SEE SIGMETS AND VAFTAD. REMARKS: CORRECTION TO CHANGE OBS ASH DATE/TIME LINE. DUE TO SATELLITE RAPID SCANNING OPERATIONS THE IMAGERY IS CUT OFF SOUTH OF S0139. A HOTSPOT HAS BEEN DETECTED AT THE VOLCANO SINCE 0645Z AND A PLUME CAN BE BRIEFLY SEEN SPREADING WEST TO SOUTHWEST FROM THE SUMMIT TO BEYOND THE IMAGERY. THE HEIGHT IS ESTIMATED BASED ON CLOUD MOTION BECAUSE THE MODEL WINDS ARE NOT VERIFYING. NEXT ADVISORY: WILL BE ISSUED BY 2003AUG31/1500Z. NNNN