FVXX20 KWBC 281730 CCA VOLCANIC ASH ADVISORY - CORRECTION ISSUED: 2002AUG28/1730Z VAAC: WASHINGTON CORRECTED FOR TIME OF NEXT ADVISORY . VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2002/419 . INFORMATION SOURCE: GOES-8 IMAGERY. GUAYAQUIL MWO SIGMET. AVN MODEL WINDS FORECAST. ERUPTION DETAILS: ASH OBSERVED AT 29/1105Z. . OBS ASH DATE/TIME: 29/1105Z . OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/FL180 MOVING W 10 KNOTS. . FCST ASH CLOUD+6H: SEE SIGMETS. . REMARKS: THE MOST RECENT SIGMET FROM GUAYAQUIL CITED A PILOT REPORT OF ASH TO FL180 MOVING WEST. ASH WAS NOT DETECTED IN SATELLITE DATA THROUGH 29/1115Z. TURK . NEXT ADVISORY: WILL BE ISSUED BY 29/1730Z. . NNNN