Mesoscale Discussion 0999
   NWS Storm Prediction Center Norman OK
   0618 PM CDT Fri Jun 18 2021

   Areas affected...Far Southeastern Indiana and Southwestern Ohio

   Concerning...Tornado Watch 279...

   Valid 182318Z - 190115Z

   The severe weather threat for Tornado Watch 279 continues.

   SUMMARY...The best chance for a tornado over the next couple of
   hours will exist over southwestern Ohio and far southeastern
   Indiana.

   DISCUSSION...An extensive cirrus anvil from the persistent cluster
   of supercells that has evolved out of east-central Indiana into
   west-central/southwestern Ohio has largely reduced the tornado
   threat downstream across central Ohio.  Meanwhile, the tornado
   threat will continue with the dominant supercell in Montgomery
   County Ohio as it moves southeastward and with storms that are
   developing upstream/to the west. While the 0-3 km SRH has been
   decreasing over the past few hours per the KILN VAD profiles (to
   around 200 m2/s2), STP values still remain above 2 across the
   region.  As a result, tornadoes remain possible along with the
   threat for large hail and damaging winds.

   ..Jirak.. 06/18/2021

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

   ATTN...WFO...ILN...IWX...IND...

   LAT...LON   39698529 39798528 40068514 40408478 40198425 39738346
               39528309 39288302 39038311 38908393 39008445 39268530
               39348530 39698529