Light volcanic ash emissions were observed at Santiaguito by webcam as of 28 September 2026, 23:50 UTC. Satellite imagery was obscured by meteorological clouds, and model guidance forecasts light and variable winds to the northeast through the next 6 hours.Original VAAC bulletin:FVXX26 at 00:16 UTC, 29/09/26 from KNESVA ADVISORYDTG: 20260929/0014ZVAAC: WASHINGTONVOLCANO: SANTA MARIA 342030PSN: N1445 W09133AREA: GUATEMALASOURCE ELEV: 12287 FT AMSLADVISORY NR: 2026/580INFO SOURCE: GOES-19. WEBCAM. NWP MODELS. ERUPTION DETAILS: VA EMS OBSEST VA DTG: 28/2350ZEST VA CLD: SFC/FL130 N1447 W09130 - N1443 W09129- N1443 W09137 - N1446 W09136 - N1447 W09130 MOVE 5KT FCST VA CLD +6HR: 29/0600Z SFC/FL130 N1450 W09129- N1447 W09125 - N1444 W09133 - N1446 W09135 -N1450 W09129 FCST VA CLD +12HR: 29/1200Z NO VA EXPFCST VA CLD +18HR: 29/1800Z NO VA EXPRMK: VA EMS NOT OBS IN STLT IMG DUE TO MET CLDS.LGT VA EMS SEEN IN WEBCAM. NWP MDL GUIDANCE FCSTSLGT AND VARIABLE WINDS GEN TO THE NE THRU T+6. HGTBASED ON WEBCAM. ...MONAGHANNXT ADVISORY: WILL BE ISSUED BY 20260929/0615Z