ACUS11 KWNS 272324
SWOMCD
SPC MCD 272324=20
INZ000-MIZ000-ILZ000-280100-
Mesoscale Discussion 2020
NWS Storm Prediction Center Norman OK
0624 PM CDT Tue Aug 27 2024
Areas affected...Northeast IL into extreme northwest IN/southwest MI
Concerning...Severe Thunderstorm Watch 658...
Valid 272324Z - 280100Z
The severe weather threat for Severe Thunderstorm Watch 658
continues.
SUMMARY...The severe threat will spread southeastward through early
evening.
DISCUSSION...A supercell has developed across far northeast IL, with
reports of severe wind gusts and hail up to golf ball size thus far.
Large to extreme instability will continue to support vigorous
updrafts early this evening. Deep-layer shear becomes increasingly
modest with southward extent, but will remain locally enhanced near
a lake-enhanced surface boundary draped northwest to southeast
across the Chicagoland vicinity. The ongoing supercell may propagate southeastward near this boundary, with a continued threat of large
hail and severe/damaging gusts.=20
There is some potential for additional development near the trailing
outflow, with increasing cumulus noted in Kane County. Depending on
the number and proximity of storms that develop early this evening,
some upscale growth into a southeastward-moving cluster will be
possible with time. Downstream watch issuance is possible if a
severe threat begins to approach northwest IN/southwest MI.
..Dean/Gleason.. 08/27/2024
...Please see
https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!9xcME60XS7523ZVoIcTLBfChHDX0hNqj9jX4WqWB9z2URY2GNTvC72FSzeh3gyRTg-zjASEAW= KtTcVJzbLhJU-eJ-fM$ for graphic product...
ATTN...WFO...IWX...LOT...
LAT...LON 42488833 42458779 42398760 42088668 41808633 41518637
41258654 41188716 41288767 41548817 41828869 42388855
42488833=20
=3D =3D =3D
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