FVXX20 KWBC 222000 VOLCANIC ASH ADVISORY ISSUED: 2002MAR22/2000Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S07826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M). . ADVISORY NUMBER: 2002/168 . INFORMATION SOURCE: GOES-8 IMAGERY. AVN MODEL WINDS FORECAST. GUAYAQUIL MWO SIGMET. . ERUPTION DETAILS: ASH CLOUD OBSERVED THROUGH 22/1545Z. . OBS ASH DATE/TIME: 22/1915Z. . OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/FL220 MOVING NW 10 KNOTS. . FCST ASH CLOUD+6H: SEE SIGMETS. . REMARKS: THE ASH CLOUD OBSERVED EARLIER HAS BECOME TOO THIN TO BE VISIBLE IN IMAGERY. THE EARLIER OBSERVED ASH WAS ESTIMATED AT FL220. . NEXT ADVISORY: WILL BE ISSUED BY 2002MAR23/0200Z . NNNN