FVXX24 KNES 211633 VA ADVISORY DTG: 20170821/1633Z VAAC: WASHINGTON VOLCANO: TURRIALBA 345070 PSN: N1001 W08346 AREA: COSTA_RICA SUMMIT ELEV: 10958 FT (3340 M) ADVISORY NR: 2017/226 INFO SOURCE: VOLCANO WEB CAMERA. OVSICORI-UNA. ERUPTION DETAILS: ERUPTION RPRTD TO FL120 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