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Mesoscale Discussion 1114
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   Mesoscale Discussion 1114
   NWS Storm Prediction Center Norman OK
   0725 PM CDT Wed Jun 21 2017

   Areas affected...southeast North Dakota...western Minnesota...and
   northeast South Dakota

   Concerning...Severe Thunderstorm Watch 361...

   Valid 220025Z - 220230Z

   The severe weather threat for Severe Thunderstorm Watch 361

   SUMMARY...Scattered strong/locally severe thunderstorms continue
   across WW 361, where severe risk continues.

   DISCUSSION...Latest radar loop shows thunderstorms moving generally
   eastward across areas in/near WW 361, with a few severe/supercell
   storms evident based on radar characteristics.  Storms across
   northwest Minnesota continue to gradually weaken, consistent with
   the fact that the axis of greatest instability remains within a
   north-south axis near the North Dakota/Minnesota border.  As storms
   continue to encounter more stable air into north central Minnesota,
   expect the weakening trend to continue.

   Farther south, a supercell storm roughly 30 miles northwest of
   Chandler, MN (AXN) is moving east-southeast, roughly along the
   northern edge of a northwest-to-southeast instability gradient
   paralleling a surface warm front extending from southeast Minnesota
   across Iowa.  While this storm will likely shift gradually
   east-southeastward out of the watch, and continue to pose a severe
   risk including potential for an isolated tornado, threat is not
   expected at this time to become areally substantial enough
   east/southeast of WW 361 to warrant new WW issuance.

   Finally, storms remain weaker across northeast South Dakota, farther
   from the influence of the upper system crossing southern portions of
   the Canadian Prairie at this time.  Still, an isolated/briefly
   severe storm may affect southwest portions of the WW over the next
   1-2 hours.

   ..Goss.. 06/22/2017

   ...Please see for graphic product...


   LAT...LON   44699899 45339862 46669689 47549623 48309632 48429425
               47159417 45819448 44619418 44239515 44819723 44699899 

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