Storm Prediction Center Mesoscale Discussion 606

   Mesoscale Discussion 0606
   NWS Storm Prediction Center Norman OK
   0327 PM CDT Tue Apr 29 2025

   Areas affected...southern IL/IN into southwest OH.

   Concerning...Severe Thunderstorm Watch 188...189...

   Valid 292027Z - 292230Z

   The severe weather threat for Severe Thunderstorm Watch 188, 189
   continues.

   SUMMARY...Strong to severe thunderstorms producing damaging wind
   gusts will move from southern Illinois into southern Indiana the
   next 1-2 hours. Additional severe risk may redevelop into southwest
   Ohio this evening.

   DISCUSSION...A mature MCS continues to move from southern IL into
   southern IN this afternoon. This activity has sporadically produced
   damaging gusts and isolated hail over the last couple of hours, with
   a couple areas of line-embedded rotation also noted. These storms
   should maintain intensity as it moves east across a moderately
   unstable airmass with steepening low-level lapse rates continuing to
   support damaging wind potential across Severe Thunderstorm Watch
   189. 

   By evening, this MCS is expected to approach southwest OH and Severe
   Thunderstorm Watch 188. The airmass across this area has shown signs
   of recovery from a midday cluster of severe storms now approaching
   western PA. Temperatures have rebounded into the mid/upper 70s with
   dewpoints in the mid/upper 60s. This area could support a continued
   severe risk into this evening. As such, watch clearance has not been
   recommended as redevelopment of new convection is possible.
   Likewise, the cluster moving into southern IN also may approach this
   area in the next 2-3 hours.

   ..Leitman.. 04/29/2025

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

   ATTN...WFO...ILN...LMK...IND...PAH...ILX...

   LAT...LON   39028811 39978441 39828393 39468362 39168363 38878409
               38558476 37958663 37678822 37808866 38618855 39028811 

   MOST PROBABLE PEAK TORNADO INTENSITY...85-115 MPH
   MOST PROBABLE PEAK WIND GUST...55-70 MPH
   MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN