FVXX20 KWBC 201700 VOLCANIC ASH ADVISORY ISSUED: 2002JUN20/1700Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2002/291 . INFORMATION SOURCE: GOES-8 IMAGERY. GEOPHYSICAL INSTITUTE. GUAYAQUIL MWO SIGMET. AVN MODEL WINDS FORECAST. . ERUPTION DETAILS: EXHALATION AT 20/1554Z. . OBS ASH DATE/TIME: 20/1554Z . OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/FL180 MOVING W 20 KNOTS . FCST ASH CLOUD+6H: SEE SIGMETS. . REMARKS: ASH CANNOT BE SEEN IN SATELLITE IMAGERY THROUGH 20/1615Z DUE TO EXTENSIVE WEATHER CLOUDS ACROSS THE REGION. THE GEOPHYSICAL INSTITUTE REPORTS SEISMIC ACTIVITY AND HEARING AN EXPLOSION FROM THE VOLCANO, BUT DUE TO WEATHER CLOUDS, ASH COULD NOT BE SEEN. THE AVN MODEL WINDS FORECAST INDICATES ASH WOULD MOVE W FROM SUMMIT TO FL180....KIBLER . NEXT ADVISORY: WILL BE ISSUED BY 2002JUNE20/2300Z. . NNNN