Mesoscale Discussion 0875
   NWS Storm Prediction Center Norman OK
   0600 PM CDT Sun Jun 07 2020

   Areas affected...South Dakota...Nebraska

   Concerning...Severe Thunderstorm Watch 268...

   Valid 072300Z - 080030Z

   The severe weather threat for Severe Thunderstorm Watch 268
   continues.

   SUMMARY...Severe threat will increase markedly over the next few
   hours. Hail and wind are the main threats.

   DISCUSSION...Strong low-level heating has contributed to a deep
   boundary layer across the northern/central High Plains late this
   afternoon. This has effectively removed inhibition and and deep
   convection is increasing along the frontal zone from Cherry County
   NE to McPherson County SD. Numerous hail markers are now evident
   with these supercells, and with cloud bases near 3km, gusty winds
   can also be expected.

   Additionally, a few robust thunderstorms are now intensifying along
   the southern periphery of the Black Hills. This activity should
   spread northeast toward ww269 later this evening. Hail/wind remain
   the primary threats.

   Overall, an expansive corridor of strong-severe convection should
   ultimately evolve across this region over the next several hours.

   ..Darrow.. 06/07/2020

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

   ATTN...WFO...FSD...ABR...LBF...UNR...CYS...

   LAT...LON   42060274 45919995 45909742 42070040 42060274