<pre>ACUS11 KWNS 080022
SWOMCD
Mesoscale Discussion 0300
NWS Storm Prediction Center Norman OK
0722 PM CDT Tue Apr 07 2020
Areas affected...Southern Lake Michigan vicinity and northern
Illinois into east central Iowa
Concerning...Severe Thunderstorm Watch 82...
Valid 080022Z - 080145Z
The severe weather threat for Severe Thunderstorm Watch 82
continues.
SUMMARY...Scattered severe storms capable of producing large to very
large hail and locally strong surface gusts are expected to linger
into the 9-11 PM CDT time frame, gradually spreading southward into
the Interstate 80 corridor.
DISCUSSION...Large-scale forcing for ascent to support further
upscale convective growth is unclear. However, scattered vigorous
discrete storms, including isolated supercells, are ongoing, and are
likely to continue at least another few hours. This appears focused
near the leading edge of cooling around the 700 mb level, which is
forecast to continue gradually spreading southward across the
Interstate 80 through 02-04Z.
Strongest cells have already occasionally produced 2-3 inch hail,
and, even with the onset of diurnal boundary layer cooling,
thermodynamic profiles should remain favorable for a continuing risk
of large to very large hail, in the presence of strong deep layer
shear. There also could be at least some increase in potential for
localized strong surface gusts, before activity begins to wane later
this evening.
..Kerr.. 04/08/2020
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...IWX...LOT...ILX...DVN...
LAT...LON 41879196 42428995 42478798 41978680 41338676 40959001
41329171 41879196 </pre>
https://wxn.io/30TQ1
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