FVXX25 KNES 120430
VA ADVISORY
DTG: 20210412/0430Z

VAAC: WASHINGTON

VOLCANO: SOUFRIERE ST VINCENT 360150
PSN: N1319 W06110

AREA: W_INDIES

SUMMIT ELEV: 3865 FT (1178 M)

ADVISORY NR: 2021/017

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

ERUPTION DETAILS: CONTG EXPLOSIVE EMS.

OBS VA DTG: 12/0400Z

OBS VA CLD: SFC/FL100 N1423 W06235 - N1335 W06106
- N1302 W06111 - N1328 W06249 - N1423 W06235 MOV
NW 5KT SFC/FL350 N1418 W05747 - N1139 W05831 -
N1241 W06116 - N1358 W06102 - N1418 W05747 MOV E
30KT SFC/FL400 N2100 W02558 - N1217 W02458 -
N0809 W03624 - N0844 W04711 - N1719 W04639 -
N1902 W03942 - N2100 W02558 MOV E 40KT SFC/FL480
N1722 W04644 - N0838 W04717 - N1130 W05822 -
N1424 W05741 - N1722 W04644 MOV E 35KT 

FCST VA CLD +6HR: 12/1000Z SFC/FL100 N1559 W06227
- N1316 W06102 - N1307 W06122 - N1520 W06341 -
N1559 W06227 SFC/FL350 N1511 W05429 - N1109
W05432 - N1241 W06110 - N1404 W06053 - N1511
W05429 SFC/FL400 N1859 W02534 - N1001 W02504 -
N0833 W03246 - N0932 W04514 - N1708 W04520 -
N1827 W03639 - N1859 W02534 SFC/FL480 N1708
W04529 - N0929 W04520 - N1112 W05436 - N1507
W05421 - N1708 W04529 

FCST VA CLD +12HR: 12/1600Z SFC/FL100 N1558
W06112 - N1313 W06100 - N1308 W06123 - N1550
W06249 - N1558 W06112 SFC/FL350 N1538 W05158 -
N0941 W05236 - N1241 W06110 - N1352 W06059 -
N1538 W05158 SFC/FL400 N1851 W02531 - N1004
W02507 - N0818 W03313 - N0917 W04508 - N1659
W04520 - N1851 W02531 SFC/FL480 N1705 W04523 -
N0911 W04511 - N0932 W05229 - N1551 W05157 -
N1705 W04523 

FCST VA CLD +18HR: 12/2200Z SFC/FL100 N1605
W06026 - N1313 W06059 - N1307 W06119 - N1556
W06201 - N1605 W06026 SFC/FL350 N1556 W04954 -
N0809 W05032 - N1244 W06113 - N1355 W06107 -
N1556 W04954 SFC/FL400 N1626 W02528 - N0758
W02447 - N0821 W04508 - N1621 W04523 - N1626
W02528 SFC/FL480 N1629 W04529 - N0824 W04514 -
N0812 W05032 - N1600 W04950 - N1629 W04529 

RMK: FRQ EMS CONTG. VA OBS UP TO 2100 NM E FM
SUMMIT WITH HIGHER VA CONCENTRATIONS NEARER TO
SUMMIT. MOST RECENT EM ESTD TO FL350 BASED ON NWP
MDL DATA. ...CLARK

NXT ADVISORY: WILL BE ISSUED BY 20210412/1030Z