FVXX25 KNES 121454
VA ADVISORY
DTG: 20210412/1454Z

VAAC: WASHINGTON

VOLCANO: SOUFRIERE ST VINCENT 360150
PSN: N1319 W06110

AREA: W_INDIES

SUMMIT ELEV: 3865 FT (1178 M)

ADVISORY NR: 2021/019

INFO SOURCE: GOES-16. NWP MODELS. ASH3D. VOLCAT. 

ERUPTION DETAILS: CONT VO ACT WITH VA ALOFT

OBS VA DTG: 12/1410Z

OBS VA CLD: SFC/FL100 N1404 W06119 - N1343 W05955
- N1317 W06005 - N1345 W06128 - N1359 W06125 -
N1404 W06119 MOV NE 5KT SFC/FL400 N1337 W06105 -
N1328 W05658 - N1106 W05658 - N1219 W06117 -
N1337 W06105 MOV SE 30KT 

FCST VA CLD +6HR: 12/2000Z SFC/FL400 N1345 W05922
- N1305 W05336 - N1016 W05448 - N1125 W05938 -
N1249 W05955 - N1345 W05922 SFC/FL100 NO VA EXP

FCST VA CLD +12HR: 13/0200Z SFC/FL400 N1421
W05118 - N0926 W05136 - N1035 W05837 - N1359
W05749 - N1421 W05118 

FCST VA CLD +18HR: 13/0800Z SFC/FL400 N1421
W04923 - N0918 W04925 - N1007 W05626 - N1410
W05623 - N1421 W04923 

RMK: CONT VO ACT WITH VA ALOFT MOV E/ESE OF
SUMMIT AT FL400 EXTG APROX 230NM. VA SIG IS
STRONG IN RGB IMG WITH DIFFUSE EDGES. NWP MDLS
FCST CONT E/SE MVMNT THRU T+18. VO ACT HIGH.
...FISHER

NXT ADVISORY: WILL BE ISSUED BY 20210412/2100Z