FVXX25 KNES 101957
VA ADVISORY
DTG: 20210410/1957Z

VAAC: WASHINGTON

VOLCANO: SOUFRIERE ST VINCENT 360150
PSN: N1319 W06110

AREA: W_INDIES

SUMMIT ELEV: 3865 FT (1178 M)

ADVISORY NR: 2021/011

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

ERUPTION DETAILS: ONGOING EXPLOSIVE EMS.

OBS VA DTG: 10/1930Z

OBS VA CLD: SFC/FL380 N2011 W03904 - N1640 W03735
- N1458 W04235 - N1334 W05315 - N1140 W05559 -
N1453 W05744 - N1721 W05314 - N2011 W03904 MOV E
30KT SFC/FL460 N1458 W05743 - N1142 W05556 -
N1331 W05316 - N1408 W04804 - N0642 W05049 -
N1037 W05820 - N1427 W05914 - N1458 W05743 MOV SE
35KT SFC/FL520 N1425 W05916 - N1058 W05823 - N1301
W06129 - N1331 W06122 - N1425 W05916 MOV E 45KT 

FCST VA CLD +6HR: 11/0130Z SFC/FL380 N1831 W04544
- N1820 W03243 - N1240 W03336 - N1416 W04528 -
N1308 W05355 - N1518 W05538 - N1831 W04544
SFC/FL460 N1514 W05538 - N1304 W05350 - N1420
W04540 - N0455 W04755 - N1030 W05652 - N1404
W05834 - N1514 W05538 SFC/FL520 N1434 W05900 -
N1408 W05834 - N1025 W05656 - N1044 W05853 -
N1324 W06143 - N1434 W05900 

FCST VA CLD +12HR: 11/0730Z SFC/FL380 N1714
W03411 - N1102 W03301 - N1228 W05325 - N1544
W05411 - N1710 W04601 - N1714 W03411 SFC/FL460
N1537 W05414 - N1226 W05318 - N1147 W04352 -
N0438 W04444 - N0948 W05823 - N1416 W05832 -
N1537 W05414 SFC/FL520 N1416 W05832 - N0955
W05825 - N1247 W06122 - N1341 W06136 - N1416
W05832 

FCST VA CLD +18HR: 11/1330Z SFC/FL380 N1729
W04546 - N1546 W03228 - N1002 W03345 - N1243
W04126 - N1231 W05318 - N1614 W05355 - N1729
W04546 SFC/FL460 N1602 W05350 - N1235 W05323 -
N1238 W04119 - N0450 W04133 - N0959 W05809 -
N1425 W05823 - N1602 W05350 SFC/FL520 N1427
W05828 - N1002 W05809 - N1254 W06120 - N1341
W06126 - N1427 W05828 

RMK: FRQ EXPLOSIVE EMS LOFTING VA TO FL520 NEAR
SUMMIT REGION. DOWNSTREAM VA AND GASES EXTD TO
PERHAPS 1300 NM ESPECIALLY ENE BEFORE BECOMING
DIFFUSE. VAA 6-18 HR FCST ASSUMES CONT ACT. ...LEE

NXT ADVISORY: WILL BE ISSUED BY 20210411/0200Z
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