Possible volcanic ash emissions were reported for Santiaguito, but no ash plume was observed by satellite or webcam due to weather clouds obscuring the summit as of September 23, 2026, 02:25 UTC. Forecasts are uncertain and no ash is expected after 14:00 UTC.Original VAAC bulletin:FVXX22 at 02:27 UTC, 23/09/26 from KNESVA ADVISORYDTG: 20260923/0225ZVAAC: WASHINGTONVOLCANO: SANTA MARIA 342030PSN: N1445 W09133AREA: GUATEMALASOURCE ELEV: 12287 FT AMSLADVISORY NR: 2026/570INFO SOURCE: GOES-19. WEBCAM. NWP MODELS. ERUPTION DETAILS: PSBL VA EMS.EST VA DTG: 23/0150ZEST VA CLD: SFC/FL140 N1449 W09144 - N1446 W09133- N1445 W09132 - N1443 W09143 - N1449 W09144 MOVW 5KT FCST VA CLD +6HR: 23/0800Z SFC/FL140 N1449 W09146- N1446 W09132 - N1444 W09132 - N1441 W09145 -N1449 W09146 FCST VA CLD +12HR: 23/1400Z NO VA EXPFCST VA CLD +18HR: 23/2000Z NO VA EXPRMK: VA NOT OBSD BY STLT OR WEBCAM DUE TO WX CLDSOBSCG SUMMIT. NWP MDL FCSTS DIFFER SO OBS ANDFCST CONFDC IS LOW. ...HOSLEYNXT ADVISORY: WILL BE ISSUED BY 20260923/0830Z