Possible volcanic ash emissions were reported for Santiaguito, but no ash plume or height was observed as of the latest advisory on August 29, 2026, at 20:42 UTC. Forecasts indicate potential movement of ash to the west and southwest, but no ash is expected after August 30, 2026, at 08:00 UTC.
Original VAAC bulletin:
FVXX22 at 20:45 UTC, 29/08/26 from KNES
VA ADVISORY
DTG: 20260829/2042Z
VAAC: WASHINGTON
VOLCANO: SANTA MARIA 342030
PSN: N1445 W09133
AREA: GUATEMALA
SOURCE ELEV: 12287 FT AMSL
ADVISORY NR: 2026/492
INFO SOURCE: GOES-19. NWP MODELS.
ERUPTION DETAILS: PSBL VA EMS
EST VA DTG: 29/2010Z
EST VA CLD: SFC/FL130 N1447 W09146 - N1447 W09133
- N1445 W09133 - N1441 W09145 - N1447 W09146 MOV
W 15KT
FCST VA CLD +6HR: 30/0200Z SFC/FL130 N1446 W09132
- N1445 W09132 - N1437 W09146 - N1443 W09150 -
N1446 W09132
FCST VA CLD +12HR: 30/0800Z NO VA EXP
FCST VA CLD +18HR: 30/1400Z NO VA EXP
RMK: VA EMS NOT OBSD IN STLT IMG PSBLY DUE TO MET
CLDS. VA EMS MAY BE OBSCD. W MVMT EXP TO SHIFT
SW BY T+6 HRS. MVMT AND HGT BASED ON NWP MDLS.
...BERTALAN
NXT ADVISORY: WILL BE ISSUED BY 20260830/0245Z