Mesoscale Discussion 1074
   NWS Storm Prediction Center Norman OK
   0355 PM CDT Tue Jun 07 2022

   Areas affected...Eastern Wyoming into southwest South Dakota and
   northwest Nebraska

   Concerning...Severe Thunderstorm Watch 321...

   Valid 072055Z - 072300Z

   The severe weather threat for Severe Thunderstorm Watch 321
   continues.

   SUMMARY...The threat for severe weather continues across WW 321.
   Severe hail will remain the predominant for the next 1-2 hours
   before a gradual increase in severe wind potential later this
   evening.

   DISCUSSION...Several discrete supercells are being tracked across
   far eastern WY, southwest SD, and northwest NE. Several severe hail
   reports have been noted with this activity, including a report of
   1.75 inch hail. Instability has increased over the past 2 hours with
   MLCAPE values around 1000 J/kg for most of the region. Effective
   bulk shear remains near 40-50, so in general the environment remains
   supportive for organized convection. 

   A pair of supercells across the NE panhandle are fairly isolated,
   and visible imagery shows little development in their immediate
   vicinity. Additionally, these cells are migrating into better
   low-level moisture, which will provide better surface-based
   buoyancy. Consequently, these cells will continue to pose a large
   hail threat and may have the best chance for producing significant
   hail in the near term. 

   Further to the north, semi-discrete supercells and a developing
   cluster are noted from the WY/NE border to the Rapid City, SD
   region. The stronger, more discrete cells will continue to pose a
   hail risk, but trends from KUDX suggest that outflows may be
   starting to consolidate. A transition to a more linear storm mode
   may be underway, and a more substantial severe wind threat may
   emerge across far northwest NE/southwest SD over the next 1-3 hours.

   ..Moore.. 06/07/2022

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

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

   LAT...LON   43170447 43680432 44080365 44370274 44020094 43660026
               42960013 41800018 40980124 41010267 41040419 42220459
               43170447