FVXX20 KNES 282121 VA ADVISORY DTG: 20120528/2121Z VAAC: WASHINGTON VOLCANO: POPOCATEPETL 1401-09 PSN: N1901 W09837 AREA: MEXICO SUMMIT ELEV: 17802 FT (5426 M) ADVISORY NR: 2012/191 INFO SOURCE: MEXICO CITY MWO. VOLCANO WEB CAMERA. ERUPTION DETAILS: ERUPTION AT 28/2057 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 NNNN