FVXX20 KNES 211242 VOLCANIC ASH ADVISORY ISSUED: 20070721/1241Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA LOCATION: S0128 W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2007/425 INFORMATION SOURCE: NOT AVBL ERUPTION DETAILS: NOT AVBL REMARKS: WE HAVE RECEIVED INFORMATION SUGGESTING A POSSIBLE VA EMISSION. WE WILL GATHER FURTHER INFORMATION AND ISSUE A FULL ADVISORY AS SOON AS POSSIBLE. NEXT ADVISORY: AS SOON AS POSSIBLE