Storm Prediction Center Mesoscale Discussion 1497

   Mesoscale Discussion 1497
   NWS Storm Prediction Center Norman OK
   0351 PM CDT Sat Jul 04 2026

   Areas affected...northeast Illinois into western Indiana

   Concerning...Severe Thunderstorm Watch 455...

   Valid 042051Z - 042215Z

   The severe weather threat for Severe Thunderstorm Watch 455
   continues.

   SUMMARY...Locally damaging wind gusts remain possible from
   east-central Illinois into western Indiana. A new watch may not be
   needed depending on trends.

   DISCUSSION...Convection increased ahead of the MCV moving out of IA,
   but has generally moved slowly, producing heavy rain. The air mass
   across the region continues to heat and destabilize, and remains
   sufficient for at least localized severe wind gusts. Recent radar
   trends have shown some bowing storms, which may be capable of
   damaging gusts. Unless storms become better organized, an additional
   watch may not be needed downstream.

   ..Jewell.. 07/04/2026

   ...Please see www.spc.noaa.gov for graphic product...

   ATTN...WFO...IWX...IND...LOT...ILX...

   LAT...LON   39958946 40708881 41388845 41738846 42038821 42078797
               41698681 41108659 40168670 39828687 39528762 39428837
               39718924 39958946 

   MOST PROBABLE PEAK WIND GUST...55-70 MPH