Mesoscale Discussion 1654
   NWS Storm Prediction Center Norman OK
   0558 PM CDT Mon Aug 30 2021

   Areas affected...Southwestern and south-central North Dakota

   Concerning...Severe Thunderstorm Watch 476...

   Valid 302258Z - 310000Z

   The severe weather threat for Severe Thunderstorm Watch 476
   continues.

   SUMMARY...Scattered supercells have produced large to very large
   hail. The environment will support the continuation of mature storms
   for at least some period beyond 7 PM CDT. Either a local extension
   in time or new watch will likely be needed.

   DISCUSSION...Scattered supercell thunderstorms continue to move
   slowly south and east to the west of Bismarck. Deep-layer shear and
   a modest increase in southerly 850 mb winds should maintain the more
   mature supercells even beyond the 7 PM CDT scheduled watch
   expiration. With the continued potential for large to very large
   hail and isolated damaging winds, either a local extension in time
   of WW 476 or a new watch will likely be needed before 7 PM CDT.

   ..Wendt.. 08/30/2021

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

   ATTN...WFO...BIS...

   LAT...LON   47570322 47840318 47760177 47330112 46300016 46030017
               45960264 47570322