Storm Prediction Center Mesoscale Discussion 1081

   Mesoscale Discussion 1081
   NWS Storm Prediction Center Norman OK
   1200 AM CDT Thu Jun 11 2026

   Areas affected...Portions of central and east-central Illinois into
   western Indiana.

   Concerning...Severe Thunderstorm Watch 309...

   Valid 110500Z - 110630Z

   The severe weather threat for Severe Thunderstorm Watch 309
   continues.

   SUMMARY...Isolated damaging wind gusts will persist for a few more
   hours.

   DISCUSSION...A line of storms continues east across central
   Illinois. This line of storms has a history of wind damage and shows
   strong outbound winds from KILX. Expect this line of storms to
   persist eastward into a moderately unstable airmass (2000 to 2500
   J/kg MUCAPE per SPC mesoanalysis) with a strengthening low-level jet
   feeding this activity from the southwest. This line of storms will
   likely pose a continued damaging wind threat for a few more hours
   before eventually weakening. Severe thunderstorm watch 309 has been
   expanded eastward/southeastward to cover this continued threat.

   ..Bentley.. 06/11/2026

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

   ATTN...WFO...IND...LOT...ILX...LSX...

   LAT...LON   39589021 39919034 40048981 40288921 40618883 40678829
               40538764 40118698 39698697 39038722 38948776 39088857
               39308941 39589021 

   MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH
   MOST PROBABLE PEAK WIND GUST...65-80 MPH
   MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN