Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Washington warned of a volcanic ash plume rising to an estimated 15000 ft (4600 m), or flight level 150.Original VAAC bulletin:FVXX21 at 09:04 UTC, 13/08/26 from KNESVA ADVISORYDTG: 20260813/0901ZVAAC: WASHINGTONVOLCANO: SANTA MARIA 342030PSN: N1445 W09133AREA: GUATEMALASOURCE ELEV: 12287 FT AMSLADVISORY NR: 2026/475INFO SOURCE: GOES-19. WEBCAM. NWP MODELS. ERUPTION DETAILS: VA EMS OBSOBS VA DTG: 13/0830ZOBS VA CLD: SFC/FL150 N1446 W09133 - N1444 W09132- N1441 W09156 - N1444 W09156 - N1446 W09133 MOVSW 10KT FCST VA CLD +6HR: 13/1430Z SFC/FL150 N1446 W09133- N1444 W09132 - N1434 W09210 - N1441 W09212 -N1446 W09133 FCST VA CLD +12HR: 13/2030Z SFC/FL150 N1446W09132 - N1444 W09132 - N1435 W09211 - N1444W09213 - N1446 W09132 FCST VA CLD +18HR: 14/0230Z SFC/FL150 N1447W09132 - N1444 W09132 - N1435 W09211 - N1444W09213 - N1447 W09132 RMK: VA EMS OBS IN STLT IMG UP TO APPRX 23NM FMSUMMIT. VA EMS SEEN IN WEBCAM. NWP MDL GUIDANCEFCSTS GEN SW MOVMT THRU T+18. HGT BASED ONWEBCAM, MOVMT, AND NWP MDLS. ...MONAGHANNXT ADVISORY: WILL BE ISSUED BY 20260813/1500Z