FVXX20 KWBC 310330 VOLCANIC ASH ADVISORY ISSUED: 2002JAN31/0330Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S7826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M). . ADVISORY NUMBER: 2002/038 . INFORMATION SOURCE: GOES-8 VISIBLE..INFRARED AND MULTISPECTRAL IMAGERY. NWS NUMERICAL MODEL WINDS FORECAST. THE GEOPHYSICAL INSTITUTE IN QUITO. SIGMET FROM GUAYAQUIL METEOROLOGICAL WATCH OFFICE. . ERUPTION DETAILS: EXHALATION AT 30/2230Z TO FL200. . OBS ASH DATE/TIME: 31/0245Z . OBS ASH CLOUD: SFC/FL200 MOVING W 10 KNOTS ASH NOT IDENTIFIABLE FROM SATELLITE DATA. . FCST ASH CLOUD+6H: SEE SIGMETS . REMARKS: CURRENT SATELLITE IMAGERY SHOWS EXTENSIVE CLOUD COVER OVER THE REGION OF THE VOLCANO THUS MAKING DETECTION OF ASH DIFFICULT....WALTER . NEXT ADVISORY: NO FURTHER ADVISORIES . NNNN