FVXX23 KNES 280656 VA ADVISORY DTG: 20211228/0656Z VAAC: WASHINGTON VOLCANO: REVENTADOR 352010 PSN: S0004 W07739 AREA: ECUADOR SUMMIT ELEV: 11686 FT (3562 M) ADVISORY NR: 2021/1184 INFO SOURCE: GOES-16. WEBCAM. NWP MODELS. ERUPTION DETAILS: PSBL VA EMS. OBS VA DTG: 28/0610Z OBS VA CLD: SFC/FL15 N0005 W07747 - S0004 W07739 - S0005 W07739 - N0001 W07751 - N0005 W07747 MOV NW 10KT FCST VA CLD +6HR: 28/1200Z SFC/FL150 N0003 W07750 - S0004 W07739 - S0005 W07740 - S0001 W07753 - N0003 W07750 FCST VA CLD +12HR: 28/1800Z NO VA EXP FCST VA CLD +18HR: 29/0000Z NO VA EXP RMK: VA NOT OBSD BY STLT. HWVR...WEBCAM SHOWS EMS AT SUMMIT IN THERMAL IR. UNCERTAIN IF VA OR STEAM/GAS. NWP MDLS SUGGEST ANY EMS ARE MOVG NW WITH EMS MOVG WNW BY T+6HRS ...HOSLEY NXT ADVISORY: WILL BE ISSUED BY 20211228/1300Z