FVXX24 KNES 162334 VA ADVISORY DTG: 20210716/2334Z VAAC: WASHINGTON VOLCANO: POPOCATEPETL 341090 PSN: N1901 W09837 AREA: MEXICO SUMMIT ELEV: 17802 FT (5426 M) ADVISORY NR: 2021/470 INFO SOURCE: WEBCAM. NWP MODELS. ERUPTION DETAILS: VA EM OBSD AT 2324Z OBS VA DTG: 16/2321Z OBS VA CLD: SFC/FL190 N1903 W09841 - N1901 W09837 - N1900 W09837 - N1859 W09842 - N1903 W09841 MOV W 10KT FCST VA CLD +6HR: NOT AVBL FCST VA CLD +12HR: NOT AVBL FCST VA CLD +18HR: NOT AVBL 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