Storm Prediction Center Mesoscale Discussion 1454

   Mesoscale Discussion 1454
   NWS Storm Prediction Center Norman OK
   0647 PM CDT Thu Jun 27 2024

   Areas affected...northeastern Wyoming into western South Dakota

   Concerning...Severe Thunderstorm Watch 475...

   Valid 272347Z - 280145Z

   The severe weather threat for Severe Thunderstorm Watch 475
   continues.

   SUMMARY...Risk for locally damaging gusts and isolated hail should
   gradually increase across northern portions of WW 475 over the next
   1 to 2 hours.

   DISCUSSION...Latest radar loop shows isolated strong storms east of
   the Black hills, and a separate/expanding cluster of storms moving
   eastward out of southeastern Montana and northeastern Wyoming into
   northern portions of WW 475.  

   With a moist/moderately unstable environment in the vicinity of the
   warm and cold fronts and the narrow warm sector in between, and
   veering flow with height providing ample shear for rotating storms,
   the overall environment remains supportive of large hail and
   damaging gusts with stronger storms.  As such, as the convection
   spreads eastward into western South Dakota, severe risk should
   gradually increase.

   ..Goss.. 06/27/2024

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

   ATTN...WFO...ABR...BIS...UNR...BYZ...

   LAT...LON   45130421 45960385 45940212 44190113 43460129 43350310
               44060530 44850535 45130421