<pre>ACUS11 KWNS 070404
SWOMCD
Mesoscale Discussion 0291
NWS Storm Prediction Center Norman OK
1103 PM CDT Mon Apr 06 2020
Areas affected...northern Illinois into northwest Ohio
Concerning...Severe potential...Watch unlikely
Valid 070403Z - 070630Z
Probability of Watch Issuance...5 percent
SUMMARY...Storms will increase in coverage tonight, with mainly
small hail expected. Isolated cells may produce hail approaching 1".
DISCUSSION...Showers are beginning to form over northern IL in a
zone of low-level warm advection which is aiding lift and
destabilization. 00Z soundings from DVN and ILX show steep midlevel
lapse rates, with unstable parcels originating above 850 mb. Within
the cloud bearing layer, sufficient shear was noted to sustain storm
cells.
With a continued influx of relatively moist air from the southwest,
and PWAT approaching 1.00", the result should be increasing coverage
of elevated storms, moving in an east/southeastward direction. While
hail will be the main threat, locally strong wind gusts cannot be
ruled out from northern IN into OH, conditional on sufficient
clustering of downdrafts.
..Jewell.. 04/07/2020
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...CLE...ILN...DTX...IWX...GRR...IND...LOT...MKX...
DVN...
LAT...LON 42558876 42648733 42338558 41858423 41448368 40708351
40278400 40228491 41018864 41208911 41458937 41798939
42078932 42338908 42558876 </pre>
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