Mesoscale Discussion 0253
   NWS Storm Prediction Center Norman OK
   0303 PM CDT Sat Mar 28 2020

   Areas affected...Parts of central Indiana and Ohio into southwestern
   Pennsylvania

   Concerning...Severe Thunderstorm Watch 67...

   Valid 282003Z - 282130Z

   The severe weather threat for Severe Thunderstorm Watch 67
   continues.

   SUMMARY...Widely scattered strong to severe thunderstorm activity
   may persist near/north of the Interstate 70 corridor another couple
   of hours, before diminishing by 6-8 PM EDT.

   DISCUSSION...Frontolysis appears underway, from west to east, along
   the Interstate 70 corridor, with the primary surface frontal zone
   redeveloping northward into southern portions of the Great Lakes
   region through early evening.  However, scattered vigorous
   thunderstorm development persists, probably aided by inflow of
   unstable boundary layer air characterized by CAPE in excess of 1000
   J/kg.  

   Given the increasingly widespread nature to the convection, and
   general stabilization of the surrounding boundary layer due to rain
   cooling and decreasing insolation, convective intensities seem
   likely to trend downward through 6-8 PM EDT.  However, until then,
   widely scattered strong storms, perhaps including a small evolving
   cluster approaching northern portions of the Indianapolis metro
   area, may continue to pose a risk for severe hail and locally strong
   surface gusts.

   ..Kerr.. 03/28/2020

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

   ATTN...WFO...PBZ...RLX...CLE...ILN...IWX...IND...

   LAT...LON   40178722 40558601 40888394 40908150 41148034 40927960
               40417920 39778032 39728200 39728370 39608522 39658692
               40178722