FVXX21 KWBC 272130 VOLCANIC ASH ADVISORY . ISSUED: 2001DEC27/2130Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S 7826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2001/291 INFORMATION SOURCE: SIGMET FROM GUAYAQUIL METEOROLOGICAL WATCH OFFICE. GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY. AVIATION MODEL WIND FORECAST. . ERUPTION DETAILS: ASH OBSERVED AT 27/1500Z. . DETAILS OF ASH CLOUD: A SIGMET INDICATED THAT THE GEOPHYSICAL INSTITUTE OBSERVED ASH AT 1500Z TO FL23O MOVING WEST. SATELLITE IMAGERY THROUGH 2045Z DOES NOT SHOW ASH. . TRAJECTORY: ANY REMAINING ASH AT FL230 WOULD MOVE WEST SOUTHWEST AT 10-15 KNOTS. . OUTLOOK: SEE SIGMETS. . NEXT ADVISORY: NO FURTHER ADVISORIES. . KARST . NNNN