Storm Prediction Center Mesoscale Discussion 1364

   Mesoscale Discussion 1364
   NWS Storm Prediction Center Norman OK
   0237 AM CDT Sun Jun 28 2026

   Areas affected...southeast South Dakota...southwest
   Minnesota...northwest Iowa

   Concerning...Severe Thunderstorm Watch 410...

   Valid 280737Z - 280930Z

   The severe weather threat for Severe Thunderstorm Watch 410
   continues.

   SUMMARY...A corridor of damaging winds may persist across southeast
   South Dakota, with threat possibly extending into southwest
   Minnesota and northwest Iowa.

   DISCUSSION...Several severe cells currently exist near and just
   north of the SD/NE border, and continue to move east. Earlier,
   several gusts near 60 kt were reported, though more recent
   measurements indicate somewhat lesser peak gusts closer to 50 kt
   into the Wagner area.

   A moist air mass remains ahead of this storm complex, driven by
   strong warm advection with a 40-50 kt low-level jet. This should
   support strong to severe storms at least across SD, and perhaps into
   MN and IA an elevated influx of unstable air continues. Trends will
   continue to be monitored for an additional watch.

   ..Jewell.. 06/28/2026

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

   ATTN...WFO...FSD...OAX...

   LAT...LON   43719813 43969700 44179566 43949532 43449511 43149513
               42889528 42789617 42799696 42869823 43299808 43719813 

   MOST PROBABLE PEAK WIND GUST...55-70 MPH
   MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN