Ongoing volcanic ash emissions have been reported at Santiaguito, with activity observed on webcam as of 12 August 2026, 07:40 UTC. Ash movement is forecast generally northwest to west-northwest through the next 12 hours, then becoming light and variable.Original VAAC bulletin:FVXX21 at 08:11 UTC, 12/08/26 from KNESVA ADVISORYDTG: 20260812/0809ZVAAC: WASHINGTONVOLCANO: SANTA MARIA 342030PSN: N1445 W09133AREA: GUATEMALASOURCE ELEV: 12287 FT AMSLADVISORY NR: 2026/470INFO SOURCE: GOES-19. WEBCAM. NWP MODELS. ERUPTION DETAILS: VA EMS ONGOINGEST VA DTG: 12/0740ZEST VA CLD: SFC/FL140 N1455 W09143 - N1446 W09132- N1443 W09134 - N1449 W09145 - N1455 W09143 MOVNW 10KT FCST VA CLD +6HR: 12/1330Z SFC/FL140 N1459 W09150- N1446 W09132 - N1443 W09133 - N1453 W09153 -N1459 W09150 FCST VA CLD +12HR: 12/1930Z SFC/FL140 N1450W09146 - N1447 W09132 - N1443 W09132 - N1444W09146 - N1450 W09146 FCST VA CLD +18HR: 13/0130Z SFC/FL140 N1449W09136 - N1444 W09128 - N1438 W09129 - N1444W09139 - N1449 W09136 RMK: VA EMS NOT OBS IN STLT IMG DUE TO MET CLDCVR. ONGOING VA EMS SEEN IN WEBCAM. NWP MDLGUIDANCE FCSTS GEN NW TO WNW MOVMT THRU T+12,THEN LGT AND VARIABLE MOVMT BY T+18. ...MONAGHANNXT ADVISORY: WILL BE ISSUED BY 20260812/1415Z