FVXX22 KNES 101836 VA ADVISORY DTG: 20210810/1836Z VAAC: WASHINGTON VOLCANO: POPOCATEPETL 341090 PSN: N1901 W09837 AREA: MEXICO SUMMIT ELEV: 17802 FT (5426 M) ADVISORY NR: 2021/498 INFO SOURCE: GOES-16. NWP MODELS. RADIOSONDE. ERUPTION DETAILS: VA CLD DETECTED IN STLT OBS VA DTG: 10/1800Z OBS VA CLD: SFC/FL200 N1916 W09914 - N1902 W09837 - N1900 W09838 - N1907 W09917 - N1916 W09914 MOV W 15KT FCST VA CLD +6HR: 11/0000Z SFC/FL200 N1929 W09923 - N1902 W09837 - N1900 W09838 - N1904 W09934 - N1929 W09923 FCST VA CLD +12HR: 11/0600Z SFC/FL200 N1920 W09914 - N1903 W09837 - N1901 W09839 - N1856 W09916 - N1920 W09914 FCST VA CLD +18HR: 11/1200Z NO VA EXP RMK: 557 WEATHER WING FOR WASHINGTON VAAC VA EMS SEEN IN G16 STLT IMAGERY MOVG WNW APPRX 40NM FM THE SUMMIT. VA NOT SEEN IN WEBCAM DUE TO WX CLDS. FL BASED ON MMMX 12Z SOUNDING. W MVMT FCST THRU T+12 HRS. ...COVERDALE NXT ADVISORY: WILL BE ISSUED BY 20210811/0030Z