Mesoscale Discussion 1018
   NWS Storm Prediction Center Norman OK
   1135 PM CDT Fri Jun 26 2020

   Areas affected...Northern Ohio...Northwest Pennsylvania

   Concerning...Severe Thunderstorm Watch 309...

   Valid 270435Z - 270630Z

   The severe weather threat for Severe Thunderstorm Watch 309
   continues.

   SUMMARY...Thunderstorms should increase across the northern portions
   of ww309 over the next few hours. Locally damaging winds remain the
   primary threat.

   DISCUSSION...Long-lived MCS that developed over WI has progressed
   into southeast lower MI, extending west-southwest across northern
   Indiana. Within this complex, an MCV appears to be embedded
   northwest of DTW. Convection is strongest immediately ahead of this
   feature where isolated severe winds continue. Additionally, strong
   storms also arc southeast along a corridor of warm advection into
   northeast OH. While much of the convective outflow associated along
   the leading edge of this complex is less than 40kt, winds recently
   gusted to 51kt at TOL. This portion of the squall line should
   propagate across northern OH, along the south shore of Lake Erie
   over the next few hours.

   ..Darrow.. 06/27/2020

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

   ATTN...WFO...PBZ...CLE...ILN...IWX...

   LAT...LON   41008474 42638027 41397972 39778419 41008474