FVXX20 KNES 031251 VA ADVISORY DTG: 20130703/1251Z VAAC: WASHINGTON VOLCANO: POPOCATEPETL 1401-09 PSN: N1901 W09837 AREA: MEXICO SUMMIT ELEV: 17802 FT (5426 M) ADVISORY NR: 2013/168 INFO SOURCE: GOES-13. VOLCANO WEB CAMERA. ERUPTION DETAILS: BRIEF EMISSION OF ASH AT 1204Z RMK: WE HAVE RECEIVED INFORMATION SUGGESTING A POSSIBLE VA EMISSION. WE WILL GATHER FURTHER INFORMATION AND ISSUE A FULL ADVISORY AS SOON AS POSSIBLE. NXT ADVISORY: AS SOON AS POSSIBLE