FVXX20 KWBC 310925 VOLCANIC ASH ADVISORY ISSUED: 2002JAN31/0925Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S7826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M). . ADVISORY NUMBER: 2002/039 . INFORMATION SOURCE: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. NWS NUMERICAL MODEL WINDS FORECAST. THE GEOPHYSICAL INSTITUTE IN QUITO. SIGMET FROM GUAYAQUIL METEOROLOGICAL WATCH OFFICE. . ERUPTION DETAILS: PROBABLE VOLCANIC ASH CLOUD AT 31/0820Z. . OBS ASH DATE/TIME: 31/0845Z . OBS ASH CLOUD: SFC/FL200 MOVING W 10 KNOTS ASH NOT IDENTIFIABLE FROM SATELLITE DATA. . FCST ASH CLOUD+6H: SEE SIGMETS . REMARKS: THE GEOPHYSICAL INSTITUTE REPORTED A PROBABLE ASH CLOUD AT 0820Z ABOVE FL200. NO ASH WAS DETECTED IN SATELLITE IMAGERY....TURK . NEXT ADVISORY: NO FURTHER ADVISORIES . NNNN