Mesoscale Discussion 1835
NWS Storm Prediction Center Norman OK
0609 PM CDT Mon Oct 11 2021
Areas affected...central through northeast Illinois
Concerning...Tornado Watch 521...
Valid 112309Z - 120045Z
The severe weather threat for Tornado Watch 521 continues.
SUMMARY...Threat for locally strong to severe gusts and a few brief
tornadoes will persist from central and northern IL through early
DISCUSSION...An arcing line storms with embedded bowing segments and
occasional meso-vortices continues moving northeast through central
and north central IL at 35-40 kt. The activity is moving through a
relatively narrow instability corridor with 500-1000 J/kg MLCAPE.
Despite the somewhat marginal thermodynamic environment, vertical
wind profiles continue to exhibit large low-level hodographs with
250-300 m2/s2 storm relative helicity as well as 50+ kt effective
bulk shear. The downstream environment across northeast IL will
remain favorable for occasional embedded organized structures
through early evening. Storms will eventually pose a severe threat
for the Chicago metro area near or shortly after 00Z.
= = =
To unsubscribe from WX-STORM and you already have a login, go to https://lists.illinois.edu and use the "Unsubscribe" link. Otherwise email Chris Novy at firstname.lastname@example.org and ask to be removed from WX-STORM. ------------=_1633993811-54005-1586--