Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 16000 ft (4900 m) altitude or flight level 160 and is moving at 20 kts in W direction.
The full report is as follows:
FVXX22 at 14:37 UTC, 28/04/26 from KNES
VA ADVISORY
DTG: 20260428/1435Z
VAAC: WASHINGTON
VOLCANO: SANTA MARIA 342030
PSN: N1445 W09133
AREA: GUATEMALA
SOURCE ELEV: 12287 FT AMSL
ADVISORY NR: 2026/197
INFO SOURCE: GOES-19. WEBCAM. NWP MODELS. ASH3D.
VOLCAT.
ERUPTION DETAILS: ONGOING DENSE VA EMS
OBS VA DTG: 28/1410Z
OBS VA CLD: SFC/FL160 N1456 W09216 – N1446 W09132
– N1443 W09134 – N1438 W09206 – N1419 W09227 –
N1423 W09242 – N1456 W09216 MOV W 20KT SFC/FL190
N1447 W09132 – N1445 W09132 – N1436 W09136 –
N1431 W09159 – N1417 W09213 – N1425 W09223 –
N1445 W09153 – N1447 W09132 MOV SW 30KT
FCST VA CLD +6HR: 28/2000Z SFC/FL160 N1508 W09246
– N1447 W09133 – N1445 W09132 – N1431 W09249 –
N1508 W09246 SFC/FL190 N1447 W09133 – N1444
W09131 – N1349 W09302 – N1424 W09319 – N1447
W09133
FCST VA CLD +12HR: 29/0200Z SFC/FL160 N1508
W09305 – N1508 W09237 – N1438 W09232 – N1433
W09301 – N1508 W09305 SFC/FL190 N1447 W09132 –
N1444 W09132 – N1405 W09327 – N1429 W09337 –
N1447 W09132
FCST VA CLD +18HR: 29/0800Z SFC/FL160 N1511
W09321 – N1511 W09255 – N1442 W09252 – N1435
W09317 – N1511 W09321 SFC/FL190 N1447 W09133 –
N1444 W09131 – N1411 W09340 – N1437 W09349 –
N1447 W09133
RMK: DENSE VA EMS UP TO FL160 MOVG APPRX 70NM W
FM SUMMIT AND TO FL190 MOVG APPRX 55NM SW FM
SUMMIT IN STLT IMAGERY. VA EXTNDING OFF THE
COAST. VA FL BASED ON NWP MDLS AND STLT IMAGERY.
VA FCST THRU T+18 HRS BASED ON NWP MDLS.
…COVERDALE
NXT ADVISORY: WILL BE ISSUED BY 20260428/2030Z