FVXX21 KNES 201318 VA ADVISORY DTG: 20191020/1318Z VAAC: WASHINGTON VOLCANO: POPOCATEPETL 341090 PSN: N1901 W09837 AREA: MEXICO SUMMIT ELEV: 17802 FT (5426 M) ADVISORY NR: 2019/996 INFO SOURCE: GOES-EAST. WEB CAM. NWP MODELS. VOLCAT. RADIOSONDE. ERUPTION DETAILS: VA EM MOV N OBS VA DTG: 20/1311Z OBS VA CLD: SFC/FL210 N1953 W09839 - N1901 W09836 - N1900 W09839 - N1950 W09901 - N1953 W09839 MOV N 15-20KT FCST VA CLD +6HR: 20/1900Z SFC/FL210 N2008 W09905 - N2007 W09840 - N1900 W09837 - N1901 W09839 - N2008 W09905 FCST VA CLD +12HR: 21/0100Z SFC/FL210 N2008 W09900 - N2007 W09837 - N1900 W09835 - N1901 W09838 - N2008 W09900 FCST VA CLD +18HR: 21/0700Z SFC/FL210 N2008 W09903 - N2007 W09845 - N1859 W09835 - N1859 W09839 - N2008 W09903 RMK: VA DETECTED IN STLT EXTND APRX 55 NM N OF SUMMIT. FREQUWNT DISCRETE VA EM EXPECTED TO CONT THRU FCST PERIOD BASED ON RECENT ACT. ...VELASCO NXT ADVISORY: WILL BE ISSUED BY 20191020/1915Z