FVXX21 KNES 281516 VA ADVISORY DTG: 20150428/1516Z VAAC: WASHINGTON VOLCANO: COLIMA 341040 PSN: N1930 W10337 AREA: MEXICO SUMMIT ELEV: 12631 FT (3850 M) ADVISORY NR: 2015/321 INFO SOURCE: MEXICO CITY MWO. ERUPTION DETAILS: EMISSION AT 28/1501Z TO FL250 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