FVXX23 KNES 310433 VA ADVISORY DTG: 20211231/0433Z VAAC: WASHINGTON VOLCANO: REVENTADOR 352010 PSN: S0004 W07739 AREA: ECUADOR SUMMIT ELEV: 11686 FT (3562 M) ADVISORY NR: 2021/1196 INFO SOURCE: GOES-16. VONA. WEBCAM. NWP MODELS. ERUPTION DETAILS: VA EMS OBSD OBS VA DTG: 31/0410Z OBS VA CLD: SFC/FL160 N0001 W07749 - S0004 W07739 - S0005 W07740 - S0002 W07751 - N0001 W07749 MOV W 5KT FCST VA CLD +6HR: 31/1000Z SFC/FL160 N0001 W07755 - S0004 W07740 - S0005 W07740 - S0004 W07756 - N0001 W07755 FCST VA CLD +12HR: 31/1600Z NO VA EXP FCST VA CLD +18HR: 31/2200Z NO VA EXP RMK: VA CLDS OBSD IN SAT EXT APPX 10NM WNW FM SUMMIT. VONA RECEIVED AND WEBCAM SHOWS VA EMS AS WELL. VA FL/DIR BASED ON RPRT AND MDL GUIDANCE. NWP MDL FCST LTLCG THRU T+6HRS. ...ZENG NXT ADVISORY: WILL BE ISSUED BY 20211231/1030Z