FVXX20 KWBC 172230 VOLCANIC ASH ADVISORY ISSUED: 2002MAR17/2230Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S07826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M). . ADVISORY NUMBER: 2002/155 . INFORMATION SOURCE: GOES-8 IMAGERY. AVN MODEL WINDS FORECAST. GUAYAQUIL MWO SIGMET . ERUPTION DETAILS: ONGOING ASH EMISSIONS. . OBS ASH DATE/TIME: 17/1545Z . OBS ASH CLOUD: SFC/FL250 IS MOVING NORTH AT 5 KNOTS. ASH NOT OBSERVABLE IN SATELLITE DATA. . FCST ASH CLOUD+6H: SEE SIGMETS. . REMARKS: ASH CANNOT BE SEEN IN IMAGERY THROUGH 27/3245Z DUE TO EXTENSIVE WEATHER CLOUDS. . NEXT ADVISORY: WILL BE ISSUED BY 2002MAR18/0430Z. . NNNN