Possible volcanic ash emissions were observed at Santiaguito, but no ash plume height was reported as of the latest advisory. Light ash emissions were seen on webcam, with movement forecast to the southwest through 23 September 2026, 20:00 UTC.Original VAAC bulletin:FVXX22 at 16:20 UTC, 23/09/26 from KNESVA ADVISORYDTG: 20260923/1424ZVAAC: WASHINGTONVOLCANO: SANTA MARIA 342030PSN: N1445 W09133AREA: GUATEMALASOURCE ELEV: 12287 FT AMSLADVISORY NR: 2026/572INFO SOURCE: GOES-19. WEBCAM. NWP MODELS. ERUPTION DETAILS: PSBL VA EMSEST VA DTG: 23/1350ZEST VA CLD: SFC/FL130 N1446 W09132 - N1446 W09132- N1443 W09136 - N1445 W09137 - N1446 W09132 MOVSW 5KT FCST VA CLD +6HR: 23/2000Z SFC/FL130 N1446 W09132- N1445 W09132 - N1442 W09137 - N1445 W09138 -N1446 W09132 FCST VA CLD +12HR: 24/0200Z NO VA EXPFCST VA CLD +18HR: 24/0800Z NO VA EXPRMK: LIGHT VA EMS SEEN ON WEBCAM BUT WX CLDS OBSCSTLT IMG. NWP MDLS FCST GEN W MVMT THRU T+6. ...BUTLERNXT ADVISORY: WILL BE ISSUED BY 20260923/2030Z