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Mesoscale Discussion 703
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   Mesoscale Discussion 0703
   NWS Storm Prediction Center Norman OK
   0852 PM CDT Sun Jun 10 2018

   Areas affected...western South Dakota

   Concerning...Tornado Watch 171...

   Valid 110152Z - 110345Z

   The severe weather threat for Tornado Watch 171 continues.

   SUMMARY...Severe risk -- along with lingering/isolated tornado risk
   -- continues across Tornado Watch 171.

   DISCUSSION...As a cold front continues to advance across western
   South Dakota, storm mode continues to trend away from cellular
   toward a more linear configuration.  As such, overall risk continues
   to gradually transition toward mainly damaging winds -- and possibly
   hail.  Still, with a background kinematic environment supportive of
   supercells, some tornado risk will likely continue over the next
   couple of hours.

   In addition, a cluster/band of storms has developed just south of
   the current watch -- over Oglala Lakota County South Dakota and into
   northern Sheridan County, Nebraska.  As such, a watch extension in
   area into the southern-most South Dakota counties may be considered.

   ..Goss.. 06/11/2018

   ...Please see for graphic product...


   LAT...LON   43830428 44670363 45580373 45980333 45940030 44059990
               43190229 43830428 

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