FVXX20 KWBC 100300 VOLCANIC ASH ADVISORY ISSUED: 2002OCT10/0300Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2002/494 . INFORMATION SOURCE: GOES-8 IMAGERY. GEOPHYSICAL INSTITUTE. GUAYAQUIL MWO SIGMET. AVN MODEL WINDS FORECAST. . ERUPTION DETAILS: ASH OBSERVED AT 09/2335Z OBS ASH DATE/TIME: 10/0145Z . OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/FL260 MOVING W 10-15 KNOTS. . FCST ASH CLOUD+6H: SEE SIGMETS . REMARKS: THE GEOPHYSICAL INSTITUTE HAS REPORTED FREQUENT ASH EMISSIONS FROM TUNGURAHUA. WITHIN THE LAST SIX HOURS ASH HAS BEEN OBSERVED AS HIGH AS FL260. ASH IS DIFFICULT TO DETECT IN SATELLITE IMAGERY DUE TO EXTENSIVE CLOUDS. KARST . NEXT ADVISORY: WILL BE ISSUED BY 2002OCT10/0900Z . NNNN