FVXX21 KNES 271739 VOLCANIC ASH ADVISORY ISSUED: 20060727/1739Z VAAC: WASHINGTON VOLCANO: POPOCATEPETL LOCATION: N1901 W09837 AREA: MEXICO SUMMIT ELEVATION: 17802 FT (5426 M) ADVISORY NUMBER: 2006/023 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 NNNN