Possible volcanic ash emissions were reported for Reventador, but no ash plume was observed in satellite imagery as of August 27, 2026, 20:00 UTC. Forecasts indicate potential ash movement northwest, shifting west within six hours.Original VAAC bulletin:FVXX22 at 20:29 UTC, 27/08/26 from KNESVA ADVISORYDTG: 20260827/2018ZVAAC: WASHINGTONVOLCANO: REVENTADOR 352010PSN: S0004 W07739AREA: ECUADORSOURCE ELEV: 11686 FT AMSLADVISORY NR: 2026/878INFO SOURCE: GOES-19. NWP MODELS. ERUPTION DETAILS: PSBL VA EMSEST VA DTG: 27/2000ZEST VA CLD: SFC/FL140 N0001 W07749 - S0004 W07739- S0005 W07740 - S0004 W07751 - N0001 W07749 MOVNW 10KT FCST VA CLD +6HR: 28/0200Z SFC/FL140 S0001 W07753- S0004 W07740 - S0005 W07739 - S0007 W07753 -S0001 W07753 FCST VA CLD +12HR: 28/0800Z SFC/FL140 S0001W07753 - S0004 W07740 - S0005 W07739 - S0007W07753 - S0001 W07753 FCST VA CLD +18HR: 28/1400Z NO VA EXPRMK: VA EMS NOT OBSD IN STLT IMG PSBLY DUE TO METCLDS. VA EMS MAY BE OBSCD. WNW MVMT EXP TO SHIFTMORE W BY T+6 HRS. MVMT AND HGT BASED ON NWPMDLS. ...BERTALANNXT ADVISORY: WILL BE ISSUED BY 20260828/0230Z