FVXX20 KWBC 271300 VOLCANIC ASH ADVISORY ISSUED: 2002FEB27/1300Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S7826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M). . ADVISORY NUMBER: 2002/099 . INFORMATION SOURCE: GOES-8 IMAGERY. AVIATION MODEL WIND FORECAST. GEOPHYSICAL INSTITUTE . ERUPTION DETAILS: ASH OBSERVED AT 27/1215Z . OBS ASH DATE/TIME: 27/1215Z . OBS ASH CLOUD: SFC/FL200 5 NMI WIDE LINE OF ASH EXTENDING FROM 0128S7826W 0118S7843W MOVING NW 10 KNOTS . FCST ASH CLOUD+6H: SEE SIGMETS. . REMARKS: LATEST SATELLITE IMAGERY SHOWS A POSSIBLE NARROW PLUME OF ASH AND STEAM EXTENDING TO THE NORTHWEST FROM THE VOLCANO. THE ASH AND STEAM IS ESTIMATED AT FL200. KARST . NEXT ADVISORY: WILL BE ISSUED BY 2002FEB27/1900Z. . NNNN