FVXX21 KNES 302246 VA ADVISORY DTG: 20180730/2246Z VAAC: WASHINGTON VOLCANO: NEGRA, SIERRA 353050 PSN: S0049 W09110 AREA: GALAPAGOS SUMMIT ELEV: 4888 FT (1490 M) ADVISORY NR: 2018/047 INFO SOURCE: GOES-EAST. CIMSS VOLCAT. ERUPTION DETAILS: VA EM OBS IN STLT. 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