Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 21000 ft (6400 m) altitude or flight level 210 .
The full report is as follows:
FVXX21 at 05:00 UTC, 18/04/26 from KNES
VA ADVISORY
DTG: 20260418/0458Z
VAAC: WASHINGTON
VOLCANO: SANGAY 352090
PSN: S0200 W07820
AREA: ECUADOR
SOURCE ELEV: 17342 FT AMSL
ADVISORY NR: 2026/425
INFO SOURCE: GOES-19. NWP MODELS.
ERUPTION DETAILS: LKLY VA SIG OBSD.
OBS VA DTG: 18/0420Z
OBS VA CLD: SFC/FL210 S0152 W07804 – S0159 W07803
– S0201 W07820 – S0200 W07820 – S0152 W07804 MOV
E 15KT
FCST VA CLD +6HR: 18/1030Z SFC/FL210 S0140 W07800
– S0152 W07752 – S0201 W07820 – S0200 W07820 –
S0140 W07800
FCST VA CLD +12HR: 18/1630Z SFC/FL210 S0143
W07758 – S0156 W07753 – S0201 W07820 – S0159
W07820 – S0143 W07758
FCST VA CLD +18HR: 18/2230Z SFC/FL210 S0150
W07753 – S0207 W07755 – S0201 W07820 – S0200
W07820 – S0150 W07753
RMK: LKLY VA CLD OBSD ABT 15 NMI ENE OF SUMMIT.
FL ESTD FM NWP MDLS. NWP MDLS FCST VA TO GENLY
MOV NE THRU T+12HRS THEN E-ESE BY T+18HRS.
…HOSLEY
NXT ADVISORY: WILL BE ISSUED BY 20260418/1100Z
