FVXX20 KNES 141521 VA ADVISORY DTG: 20130514/1521Z VAAC: WASHINGTON VOLCANO: POPOCATEPETL 1401-09 PSN: N1901 W09837 AREA: MEXICO SUMMIT ELEV: 17802 FT (5426 M) ADVISORY NR: 2013/085 INFO SOURCE: MEXICO CITY MWO. ERUPTION DETAILS: EMISSION AT 1500Z TO FL260 MOV NE 20 KTS. 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