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Mesoscale Discussion 1437
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   Mesoscale Discussion 1437
   NWS Storm Prediction Center Norman OK
   0509 PM CDT Sun Aug 09 2020

   Areas affected...Southeast ND...Northeast SD...Western MN

   Concerning...Severe Thunderstorm Watch 423...

   Valid 092209Z - 092345Z

   The severe weather threat for Severe Thunderstorm Watch 423
   continues.

   SUMMARY...Strong/locally severe thunderstorms will likely persist
   into the early evening. Some threat will spread south/east of WW
   423, but additional watch issuance appears unlikely at this time.

   DISCUSSION...At 22Z, a broken line of thunderstorms is ongoing from
   near International Falls southwest into northwest MN and southeast
   ND. Some weakening has been noted along the northern part of the
   line, while the strongest cells further southwest continue to show
   some modest organization. The airmass downstream of the northwest MN
   convection has struggled to recover this afternoon, which is
   expected to lead to a general weakening trend with time as storms
   approach the eastern edge of the watch. For this reason, watch
   issuance downstream into MN is currently considered unlikely. 

   Further to the southwest, storms have recently developed across
   extreme northeast SD, with additional attempts at development noted
   along the front into a larger portion of northeast SD. Moderate
   instability and effective shear of 20-30 kt may result in a
   localized threat of hail/wind across northeast SD into the early
   evening, but the coverage and magnitude of the threat is expected to
   remain rather limited.

   ..Dean/Dial.. 08/09/2020

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

   ATTN...WFO...DLH...MPX...FGF...ABR...BIS...

   LAT...LON   45159905 46529769 47809600 48369448 48629391 48519368
               48169349 47509399 47019430 46229481 45549530 45129599
               45009649 44909725 44909798 44979884 45159905 

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Page last modified: August 09, 2020
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