Mesoscale Discussion 1538
   NWS Storm Prediction Center Norman OK
   0402 AM CDT Sat Jul 20 2019

   Areas affected...Portions of western/central SD

   Concerning...Severe Thunderstorm Watch 527...

   Valid 200902Z - 201000Z

   The severe weather threat for Severe Thunderstorm Watch 527
   continues.

   SUMMARY...Isolated hail/wind threat may persist mainly across parts
   of central South Dakota for the next hour or so. Severe Thunderstorm
   Watch 527 may be allowed to expire at 10Z if current trends
   continue.

   DISCUSSION...Storms have formed into a couple of small line segments
   across central SD over the past couple of hours to the north of a
   front. This activity will remain elevated above a near-surface
   stable layer, although two recent measured gusts to 70 and 76 mph in
   central SD suggest there is still some potential for isolated severe
   winds to reach the surface. Marginally severe hail may also occur
   with the strongest cores for the next hour or so as persistent
   strong shear allows for some updraft organization. Recent radar
   trends have shown a gradual decrease in strong reflectivity cores
   aloft, and the overall severe threat should remain quite isolated
   across central into eastern SD through the rest of the early
   morning. Unless observational trends suggest otherwise in the next
   hour, Severe Thunderstorm Watch 527 may be allowed to expire as
   scheduled at 10Z.

   ..Gleason.. 07/20/2019

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

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

   LAT...LON   44150103 44380255 44850252 45050169 45090093 45270046
               45519980 45549876 44239878 44150103