FVXX21 KNES 190554 VA ADVISORY DTG: 20210819/0554Z VAAC: WASHINGTON VOLCANO: REVENTADOR 352010 PSN: S0004 W07739 AREA: ECUADOR SUMMIT ELEV: 11686 FT (3562 M) ADVISORY NR: 2021/660 INFO SOURCE: GOES-16. NWP MODELS. VOLCAT. ERUPTION DETAILS: CONT VA EMS OBS VA DTG: 19/0520Z OBS VA CLD: SFC/FL150 N0001 W07801 - S0004 W07739 - S0008 W07801 - N0001 W07801 MOV W 10KT FCST VA CLD +6HR: 19/1130Z NO VA EXP FCST VA CLD +12HR: 19/1730Z NO VA EXP FCST VA CLD +18HR: 19/2330Z NO VA EXP RMK: CONT VA EMS OBS MOV W IN STLT IMAGERY. VA IS LGT. VA FCST TO CONT W MOV THRU T+6HRS BEFORE DISP. VO ACT LOW. ...FISHER NXT ADVISORY: WILL BE ISSUED BY 20210819/1200Z