FVXX25 KNES 111753
VA ADVISORY
DTG: 20210411/1753Z

VAAC: WASHINGTON

VOLCANO: SOUFRIERE ST VINCENT 360150
PSN: N1319 W06110

AREA: W_INDIES

SUMMIT ELEV: 3865 FT (1178 M)

ADVISORY NR: 2021/015

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

ERUPTION DETAILS: ONGOING EXPLOSIVE EMS.

OBS VA DTG: 11/1710Z

OBS VA CLD: SFC/FL400 N2320 W03310 - N1913 W02634
- N1323 W02747 - N0923 W03549 - N0908 W04247 -
N1331 W04526 - N1502 W05204 - N1620 W05204 -
N2320 W03310 MOV E 30KT SFC/FL520 N1618 W05211 -
N1507 W05209 - N1331 W04524 - N0916 W04242 -
N0911 W05349 - N1134 W06014 - N1254 W06122 -
N1343 W06103 - N1522 W05837 - N1618 W05211 MOV E
35KT 

FCST VA CLD +6HR: 11/2300Z SFC/FL400 N2133 W02637
- N1043 W02904 - N0931 W04227 - N1558 W05044 -
N1649 W05035 - N2133 W02637 SFC/FL520 N1649
W05040 - N1558 W05047 - N0933 W04234 - N0901
W05437 - N1242 W06117 - N1335 W06108 - N1534
W05753 - N1649 W05040 

FCST VA CLD +12HR: 12/0500Z SFC/FL400 N2104
W02656 - N1038 W02615 - N1320 W04958 - N1642
W05005 - N2104 W02656 SFC/FL520 N1647 W05010 -
N1323 W05001 - N1156 W03801 - N0908 W04144 -
N0842 W05408 - N1237 W06122 - N1328 W06110 -
N1502 W05844 - N1647 W05010 

FCST VA CLD +18HR: 12/1100Z SFC/FL400 N2133
W02705 - N1014 W02703 - N1127 W04637 - N1132
W04704 - N1659 W04836 - N2133 W02705 SFC/FL520
N1701 W04834 - N1132 W04701 - N1034 W03209 -
N0920 W03628 - N0852 W05423 - N1242 W06120 -
N1331 W06113 - N1527 W05837 - N1701 W04834 

RMK: VERY LARGE PERIODIC EMS CONT. EMS LOFTED TO
PERHAPS FL520 AND CARRIED ENE THRU ESE TO AROUND
2000 NM E OF SUMMIT. VA BECOMES MORE DIFFUSE
FURTHER E WITHIN VAAG AREA. VAAG ASSUMES CONT
EXPLOSIVE EMS AND IS UPDATED AS NEEDED. ...LEE

NXT ADVISORY: WILL BE ISSUED BY 20210412/0000Z
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