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Mesoscale Discussion 1388
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   Mesoscale Discussion 1388
   NWS Storm Prediction Center Norman OK
   1016 PM CDT Fri Jul 21 2017

   Areas affected...Southeast SD

   Concerning...Severe potential...Watch unlikely 

   Valid 220316Z - 220445Z

   Probability of Watch Issuance...20 percent

   SUMMARY...Some damaging wind and marginally severe hail threat may
   extend into portions of southeast SD late tonight.

   DISCUSSION...A cluster of strong semi-discrete cells is ongoing
   across portions of northeast SD. One potentially severe cell in
   Spink County SD is moving southeast and will eventually move out of
   WW 428, with a short-term threat of severe hail/wind. It is
   uncertain how far southeast the threat will extend in SD, given
   increasing SBCINH as nocturnal cooling continues. However, some
   upscale growth out of the convective cluster in northeast SD is
   possible, resulting in some potential for locally damaging wind into
   late tonight. At this time, the severe potential is expected to
   remain too marginal for watch issuance.

   ..Dean/Guyer.. 07/22/2017

   ...Please see for graphic product...


   LAT...LON   43719924 44029864 44579762 44579670 44219654 43589660
               43369683 43249701 43139775 43099846 43129897 43139918
               43259937 43579941 43719924 

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