FVXX20 KWBC 041800 VOLCANIC ASH ADVISORY ISSUED: 2002MAY04/1800Z VAAC: WASHINGTON. . VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2002/226 . INFORMATION SOURCE: GOES-8 IMAGERY. AVN MODEL WINDS FORECAST. GUAYAQUIL MWO SIGMET. . ERUPTION DETAILS: EXHALATION 04/1700Z . OBS ASH DATE/TIME: NIL . OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/FL180 MOVING W 10 KNOTS. . FCST ASH CLOUD+6H: SEE SIGMETS. . REMARKS: ASH IS TOO THIN TO BE DETECTED IN SATELLITE IMAGERY. GUAYAQUIL MWO REPORTS THAT ASH CLOUD IS LOCATED OVER VOLCANO...KARST NEXT ADVISORY: NO FURTHER ADVISORES. . NNNN