A possible light volcanic ash emission was indicated for Reventador as of 25 August 2026, 15:30 UTC, but no ash plume was observed due to heavy cloud cover. Forecasts suggest west-northwest movement up to FL150 for the next 6 hours.Original VAAC bulletin:FVXX22 at 16:02 UTC, 25/08/26 from KNESVA ADVISORYDTG: 20260825/1600ZVAAC: WASHINGTONVOLCANO: REVENTADOR 352010PSN: S0004 W07739AREA: ECUADORSOURCE ELEV: 11686 FT AMSLADVISORY NR: 2026/869INFO SOURCE: GOES-19. NWP MODELS. ERUPTION DETAILS: PSBL LGT VA EM EST VA DTG: 25/1530ZEST VA CLD: SFC/FL150 N0001 W07758 - S0004 W07739- S0005 W07739 - S0002 W07759 - N0001 W07758 MOVW 10KT FCST VA CLD +6HR: 25/2130Z SFC/FL150 N0005 W07756- S0004 W07739 - S0005 W07739 - N0001 W07759 -N0005 W07756 FCST VA CLD +12HR: 26/0330Z NO VA EXPFCST VA CLD +18HR: 26/0930Z NO VA EXPRMK: VA EM NOT OBS IN STLT IMG DUE TO HVY MET CLDCVR IN SUMMIT AREA. EXP WNW MOVEMENT THRU T+6HRS. FL AND PRESENT VA BSD ON PAST ACTIVITY. FCSTBSD ON NWP MDLS. ...LINERNXT ADVISORY: WILL BE ISSUED BY 20260825/2200Z