FVXX20 KWBC 181500 VOLCANIC ASH ADVISORY ISSUED: 2002SEP18/1500Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2002/440 . INFORMATION SOURCE: GOES-8 IMAGERY. GUAYAQUIL MWO SIGMET. GEOPHYSICAL INSTITUTE. AVN MODEL WINDS FORECAST. ERUPTION DETAILS: ASH OBSERVED AT 18/0818Z. OBS ASH DATE/TIME: 18/1415Z. . 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 18/1415Z DUE TO EXTENSIVE CLOUDINESS OVER THE REGION. THE GEOPHYSICAL INSTITUTE OBSERVED ASH OVER THE VOLCANO AT 0818Z TO FL240. . NEXT ADVISORY: WILL BE ISSUED BY 2002SEP18/2100Z. . NNNN