Mesoscale Discussion 1458
   NWS Storm Prediction Center Norman OK
   0950 PM CDT Thu Jun 27 2024

   Areas affected...southern North Dakota into central South Dakota

   Concerning...Severe Thunderstorm Watch 478...

   Valid 280250Z - 280445Z

   The severe weather threat for Severe Thunderstorm Watch 478
   continues.

   SUMMARY...The severe threat continues across Severe Thunderstorm
   Watch 478. Severe gusts are the main threat with an ongoing MCS,
   particularly over SD.

   DISCUSSION...A well-organized MCS continues to progress eastward
   across central portions of central ND into central SD. This MCS has
   a history of many severe gusts. However, the severe-gust frequency
   has recently been trending downward. This weakening trend coincides
   with nocturnal stabilization, where boundary-layer decoupling and
   increasing MLCINH has been noted via 02Z mesoanalysis. Still, 2000+
   J/kg MLCAPE resides ahead of the southernmost portion of the MCS in
   central SD, where strong wind gusts (perhaps exceeding 60 mph) are
   still possible over the next few hours. Nonetheless, an overall
   weakening trend should continue into the evening hours.

   ..Squitieri.. 06/28/2024

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

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

   LAT...LON   44210099 45460128 46760114 47160078 47009979 46549916
               45509878 44419883 44089948 44010032 44210099