Storm Prediction Center Mesoscale Discussion 772

   Mesoscale Discussion 0772
   NWS Storm Prediction Center Norman OK
   0150 PM CDT Mon May 18 2026

   Areas affected...Western Indiana into Eastern Ohio

   Concerning...Severe Thunderstorm Watch 220...

   Valid 181850Z - 182015Z

   The severe weather threat for Severe Thunderstorm Watch 220
   continues.

   SUMMARY...Severe thunderstorms persist and are progressing eastward
   across WW 220. They will continue to be capable of primarily
   damaging wind gusts. Conditions are being monitored for a new WW
   issued east of WW 220.

   DISCUSSION...A line of severe thunderstorms continues to progress
   across WW 220. Though the expectation is that the line should begin
   to weaken with eastward extent, it will still be capable of damaging
   wind gusts of 55-70 MPH within WW 220. Conditions will continue to
   be monitored for a new WW eastward into Ohio, though uncertainty
   exists in the convective longevity. Though the instability generally
   decreases with eastward extent, the well-established cold-pool could
   aid in persisting convection further east than the current WW 220
   boundary.

   ..Halbert.. 05/18/2026

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

   ATTN...WFO...CLE...ILN...DTX...IWX...GRR...IND...

   LAT...LON   39398604 39398620 39498680 39738654 40458605 40828578
               41118562 41508561 42008568 42098551 42058498 42028458
               41858403 41688362 41368311 40938303 40348321 39768352
               39358400 39208437 39238519 39278552 39398604 

   MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH
   MOST PROBABLE PEAK WIND GUST...55-70 MPH
   MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN