Storm Prediction Center Mesoscale Discussion 1097

   Mesoscale Discussion 1097
   NWS Storm Prediction Center Norman OK
   0513 PM CDT Thu Jun 11 2026

   Areas affected...portions of central into northeast Illinois

   Concerning...Tornado Watch 313...

   Valid 112213Z - 112315Z

   The severe weather threat for Tornado Watch 313 continues.

   SUMMARY...A strong tornado is likely ongoing across Woodford County,
   Illinois. The strong tornado threat from this storm is expected to
   continue for several more hours as it moves northeast.

   DISCUSSION...A debris ball has developed within a low-reflectivity
   hook west of Washburn, Illinois at 2205Z. This supercell is in a
   very favorable environment near the modifying outflow boundary
   across north-central Illinois. The KILX 21Z RAOB showed a very
   favorable environment with 0-500m SRH of 151 m2/s2. Recent VWP
   trends from ILX suggest this las likely increased within the past
   hour also. Given the continued northward movement of the outflow
   boundary and the discrete nature of this storm, expect an EF3+
   tornado threat to continue for several more hours this evening as it
   moves east/northeast.

   ..Bentley/Smith.. 06/11/2026

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

   ATTN...WFO...LOT...ILX...DVN...

   LAT...LON   40968956 41468879 41548810 41438778 41228773 40968813
               40858889 40828939 40968956 

   MOST PROBABLE PEAK TORNADO INTENSITY...140-170 MPH
   MOST PROBABLE PEAK WIND GUST...65-80 MPH
   MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN