FVXX23 KNES 070718 VA ADVISORY DTG: 20181207/0718Z VAAC: WASHINGTON VOLCANO: POPOCATEPETL 341090 PSN: N1901 W09837 AREA: MEXICO SUMMIT ELEV: 17802 FT (5426 M) ADVISORY NR: 2018/544 INFO SOURCE: CIMSS VOLCAT. ERUPTION DETAILS: VA SEEN IN VOLCAT RGB IMAGERY 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