FVXX23 KWBC 310700 VOLCANIC ASH ADVISORY ISSUED: 2001DEC31/0700Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S 7826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2001/293 . INFORMATION SOURCE: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. GEOPHYSICAL INSTITUTE. WIND FORECAST FROM THE AVIATION MODEL. . ERUPTION DETAILS: VOLCANIC ASH OVER THE VOLCANO AT 31/0621Z. . DETAILS OF ASH CLOUD: THE GEOPHYSICAL INSTITUTE OBSERVED VOLCANIC ASH OVER THE VOLCANO TO FL210. SATELLITE IMAGERY THROUGH 0645Z DOES NOT INDICATE ANY ASH. WE WILL CONTINUE TO MONITOR IMAGERY AND SEND ANOTHER ADVISORY IF CONDITIONS WARRANT. . TRAJECTORY: ANY ASH BETWEEN FL180 AND FL210 WILL MOVE TOWARDS THE WEST AT 10 TO 20 KTS. . OUTLOOK: SEE SIGMETS. . NEXT ADVISORY: NO FURTHER ADVISORIES . . NNNN