FVXX20 KWBC 171830 VOLCANIC ASH ADVISORY ISSUED: 2002AUG17/1830Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2002/399 . INFORMATION SOURCE: GOES-8 IMAGERY. GUAYAQUIL SIGMET. AVN MODEL ERUPTION DETAILS: EXHALATION AT 17/1750Z . OBS ASH DATE/TIME: 17/1815Z . OBS ASH CLOUD: ASH NOT IDENTIFIABLE IN SATELLITE DATA. WINDS FL100/FL300 MOVING E 15-20 KNOTS. . FCST ASH CLOUD+6H: SEE SIGMETS. . REMARKS: TWO PILOT REPORTS WERE RECEIVED FROM GUAYAQUIL WITH OBSERVATION OF VOLCANIC ASH TO FL300 MOVING EAST. SATELLITE IMAGERY DOES NOT INDICATE ANY ASH AT THIS TIME DUE TO CLOUDINESS IN THE VICINITY. WE WILL CONTINUE TO MONITOR THE IMAGERY FOR EVIDENCE OF VOLCANIC ASH. KARST . NEXT ADVISORY: WILL BE ISSUED BY 2002AUG18/0030Z . NNNN