FVXX20 KWBC 010730 VOLCANIC ASH ADVISORY ISSUED: 2002MAR28/0730Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S7826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M). . ADVISORY NUMBER: 2002/104 . INFORMATION SOURCE: GOES-8 IMAGERY. AVIATION MODEL WIND FORECAST. GEOPHYSICAL INSTITUTE . ERUPTION DETAILS: ASH OBSERVED AT 01/0038Z. . OBS ASH DATE/TIME: 01/0038Z . OBS ASH CLOUD: SFC/FL220 MOVING W 10 KNOTS. ASH NOT IDENTIFIABLE IN SATELLITE DATA. . FCST ASH CLOUD+6H: SEE SIGMETS. . REMARKS: ASH CANNOT BE SEEN IN SATELLITE IMAGERY THROUGH 01/0715 DUE TO EXTENSIVE WEATHER CLOUDS. THE GEOPHYSICAL INSTITUTE AT 01/0038Z REPORTED VOLCANIC ASH OVER THE VOLCANO TO UNKNOWN HEIGHT MOVING WEST. HEIGHT OF FL400 WAS REPORTED AT 28/0938Z AND MIGHT NO LONGER BE VALID. . NEXT ADVISORY: WILL BE ISSUED BY 2202MAR01/1330Z . NNNN