FVXX20 KWBC 180900 VOLCANIC ASH ADVISORY ISSUED: 2002SEP18/0900Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2002/439 . INFORMATION SOURCE: GOES-8 IMAGERY. GUAYAQUIL MWO SIGMET. GEOPHYSICAL INSTITUTE. AVN MODEL WINDS FORECAST. ERUPTION DETAILS: ASH INITIALLY OBSERVED AT 18/0159Z. OBS ASH DATE/TIME: 18/0818Z. . OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/FL240 MOVING W 20 KNOTS. . FCST ASH CLOUD+6H: SEE SIGMETS AND VAFTAD. . REMARKS: ASH CANNOT BE SEEN IN SATELLITE IMAGERY THROUGH 18/0845Z DUE TO EXTENSIVE CLOUDINESS OVER THE REGION....WALTER . NEXT ADVISORY: WILL BE ISSUED BY 2002SEP18/1500Z. . NNNN