FVXX23 KNES 311017 VA ADVISORY DTG: 20211231/1017Z VAAC: WASHINGTON VOLCANO: REVENTADOR 352010 PSN: S0005 W07739 AREA: ECUADOR SUMMIT ELEV: 11686 FT (3562 M) ADVISORY NR: 2021/1197 INFO SOURCE: GOES-16. WEBCAM. NWP MODELS. VOLCAT. ERUPTION DETAILS: FRQ VA EMS OBS VA DTG: 31/0950Z OBS VA CLD: SFC/FL150 N0007 W07755 - S0003 W07739 - S0004 W07740 - N0002 W07757 - N0007 W07755 MOV NW 5KT FCST VA CLD +6HR: 31/1600Z SFC/FL150 N0007 W07756 - S0004 W07738 - S0005 W07740 - N0002 W07758 - N0007 W07756 FCST VA CLD +12HR: 31/2200Z SFC/FL150 N0005 W07749 - S0004 W07738 - S0005 W07739 - N0001 W07752 - N0005 W07749 FCST VA CLD +18HR: 01/0400Z NO VA EXP RMK: FRQ VA EMS OBSD IN SAT AND WEBCAM, VA CLDS EXT ABT 20NM NW FM SUMMIT. NWP MDL FCST LTLCG THRU T+12HRS. ...ZENG NXT ADVISORY: WILL BE ISSUED BY 20211231/1615Z