Mesoscale Discussion 0887
   NWS Storm Prediction Center Norman OK
   0913 PM CDT Mon Jun 08 2020

   Areas affected...central Nebraska through eastern South Dakota

   Concerning...Severe Thunderstorm Watch 272...

   Valid 090213Z - 090415Z

   The severe weather threat for Severe Thunderstorm Watch 272
   continues.

   SUMMARY...The threat for large hail, damaging wind and a tornado or
   two will persist this evening across central Nebraska with
   additional development expected through eastern South Dakota.

   DISCUSSION...Several severe storms persist from central through
   north central NE along and north of a stalled front. The southerly
   low-level jet has increased to 40+ kt based on latest VWP, and this
   feature is augmenting isentropic ascent and frontogenetic forcing
   from NE through eastern SD. Vertical wind profiles with 45-50 kt
   effective bulk shear within a moderately unstable environment will
   continue to support some supercell structures, but there will also
   be a tendency for some storms to evolve into clusters as they spread
   northward. Primary threats remain large hail and damaging wind. The
   window of opportunity for an isolated tornado or two should
   gradually decrease, given storms are developing in post frontal
   regime where the near-surface layer is stabilizing.

   ..Dial.. 06/09/2020

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

   ATTN...WFO...MPX...FSD...ABR...LBF...UNR...

   LAT...LON   45589616 43589793 41989923 41210006 40780063 41430119
               42810035 44479879 45739751 45589616