FVXX21 KNES 210910 VA ADVISORY DTG: 20210821/0910Z VAAC: WASHINGTON VOLCANO: REVENTADOR 352010 PSN: S0005 W07739 AREA: ECUADOR SUMMIT ELEV: 11686 FT (3562 M) ADVISORY NR: 2021/671 INFO SOURCE: GOES-16. WEBCAM. NWP MODELS. ERUPTION DETAILS: FQT EM OBS VA DTG: 21/0840Z OBS VA CLD: SFC/FL150 N0005 W07759 - S0002 W07739 - S0007 W07740 - S0001 W07801 - N0005 W07759 MOV NW 5KT FCST VA CLD +6HR: 21/1430Z SFC/FL150 N0007 W07758 - S0004 W07738 - S0008 W07740 - N0001 W07801 - N0007 W07758 FCST VA CLD +12HR: 21/2030Z SFC/FL150 N0008 W07756 - S0004 W07738 - S0008 W07740 - N0002 W07800 - N0008 W07756 FCST VA CLD +18HR: 22/0230Z NO VA EXP RMK: VA NOT OBS FM STLT DUE TO WX CLD BUT WEBCAM SHOWED FQT EM CONT. OBS VA BASED ON T+6 AND NWP MODELS WITH GOOD CONFIDENCE. ...TURK NXT ADVISORY: WILL BE ISSUED BY 20210821/1515Z