Possible occasional volcanic ash emissions continue at Santiaguito, but no ash plume was observed as of the latest report on 28 October 2026 at 23:30 UTC. Forecasts indicate little change in ash movement through the next 12 hours.Original VAAC bulletin:FVXX23 at 23:56 UTC, 28/10/26 from KNESVA ADVISORYDTG: 20261028/2354ZVAAC: WASHINGTONVOLCANO: SANTA MARIA 342030PSN: N1445 W09133AREA: GUATEMALASOURCE ELEV: 12287 FT AMSLADVISORY NR: 2026/632INFO SOURCE: GOES-19. NWP MODELS. ERUPTION DETAILS: PSBL CONTG OCNL VA EMS.EST VA DTG: 28/2330ZEST VA CLD: SFC/FL140 N1446 W09133 - N1445 W09132- N1434 W09142 - N1442 W09147 - N1446 W09133 MOVSW 5KT FCST VA CLD +6HR: 29/0530Z SFC/FL140 N1446 W09133- N1445 W09132 - N1433 W09142 - N1441 W09148 -N1446 W09133 FCST VA CLD +12HR: 29/1130Z SFC/FL140 N1446W09133 - N1445 W09132 - N1432 W09142 - N1441W09149 - N1446 W09133 FCST VA CLD +18HR: 29/1730Z NO VA EXPRMK: NO VA OBS IN SAT OR WEBCAM WITH MET CLDOBSCN OF SUMMIT AREA. CONTG OCNL VA EMS PSBLBASED ON RECENT ACT. OBS VA AREA ESTD FM NWP MDLSAND PREV VAA. LTLCG FCST IN FL MVMT THRU T+12HRS. ...CLARKNXT ADVISORY: WILL BE ISSUED BY 20261029/0600Z