FVXX20 KWBC 260000 VOLCANIC ASH ADVISORY ISSUED: 2002MAR26/0000Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S07826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M). . ADVISORY NUMBER: 2002/181 . INFORMATION SOURCE: GOES-8 IMAGERY. AVN MODEL WINDS FORECAST. GEOPHYSICAL INSTITUTE. GUAYAQUIL MWO SIGMET. . ERUPTION DETAILS: ASH OBSERVED AT 25/2305Z. . OBS ASH DATE/TIME: 25/2305Z. . OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/240 MOVING W 10-15 KNOTS. . FCST ASH CLOUD+6H: SEE SIGMETS. . REMARKS: THE GEOPHYSICAL INSTITUTE OBSERVED ASH OVER THE SUMMIT AT 25/2305Z. ASH IS NOT SEEN IN THE SATELLITE IMAGERY THROUGH 25/2345Z....WALTER . NEXT ADVISORY: WILL BE ISSUED BY 2002MAR27/0600Z . NNNN