FVFE01 RJTD 281142
VAAAK2
VA ADVISORY

DTG: 20210828/1138Z

VAAC: ANCHORAGE

VOLCANO: SEMISOPOCHNOI 311060

PSN: N5156 E17935

AREA: ALEUTIAN ISLANDS

SUMMIT ELEV: 4006 FT (1221 M)

ADVISORY NR: 2021/091

INFO SOURCE: HIMAWARI/GOES 17/WEBICORDER

AVIATION COLOR CODE: ORANGE

ERUPTION DETAILS: OCNL ERUPTIONS.

OBS VA DTG: 28/1138Z

OBS VA CLD: SFC/FL100 N5332 W17930 - N5303 W17821 - N5148 E17949
- N5157 E17918 - N5332 W17930 MOV NNE 10KT.

FCST VA CLD +6HR: 28/1738Z SFC/FL100 N5334 E17942 - N5314 W17837
- N5154 E17947 - N5159 E17917 - N5334 E17942.

FCST VA CLD +12HR: 28/2338Z SFC/FL100 N5335 E17855 - N5316
W17911 - N5154 E17948 - N5201 E17908 - N5335 E17855.

FCST VA CLD +18HR: 29/0538Z SFC/FL100 N5325 E17816 - N5322
W17958 - N5155 E17947 - N5156 E17918 - N5325 E17816 - N5325
E17816.

RMK: PREVIOUS VA TO FL130 HAS DSIPT PER HIMAWARI AND GOES 17 SATELLIT
E IMAGERY.
METEOROLOGICAL CLDS ARE OVERSPREADING THE VOLCANO SUMMIT MAKING INDEP
ENDENT
DETECTION OF VA SIGNAL DIFFICULT. HOWEVER WEBICORDER DATA SUGGESTS OC
NL ERUPTIVE
ACTIVITY. TRANSPORT WINDS OUT OF THE SSW WL BECM MORE OUT OF THE SOUT
H IN COMING
HRS.

NXT ADVISORY: WILL BE ISSUED BY 20210828/1738Z

JAM AUG 2021 AAWU=