FVXX21 KNES 170909 VA ADVISORY DTG: 20210917/0909Z VAAC: WASHINGTON VOLCANO: REVENTADOR 352010 PSN: S0004 W07739 AREA: ECUADOR SUMMIT ELEV: 11686 FT (3562 M) ADVISORY NR: 2021/787 INFO SOURCE: GOES-16. NWP MODELS. ERUPTION DETAILS: CONTG OCNL VA EMS. OBS VA DTG: 17/0850Z OBS VA CLD: SFC/FL150 N0004 W07758 - S0004 W07739 - S0005 W07739 - S0001 W07759 - N0004 W07758 MOV NW 20KT FCST VA CLD +6HR: 17/1500Z SFC/FL150 N0005 W07801 - S0003 W07739 - S0005 W07740 - S0002 W07802 - N0005 W07801 FCST VA CLD +12HR: 17/2100Z NO VA EXP FCST VA CLD +18HR: 18/0300Z NO VA EXP RMK: OCNL VA EMS OBS SINCE PREV ADVISORY MOV NW AND DSIPTG WITHIN 20 NM FM SUMMIT. LTLCG FCST IN FL WINDS THRU T+6 HRS. ...CLARK NXT ADVISORY: WILL BE ISSUED BY 20210917/1515Z