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