Mesoscale Discussion 1447
   NWS Storm Prediction Center Norman OK
   0746 AM CDT Mon Aug 10 2020

   Areas affected...Northeast/East-Central NE...Northwest/West-Central
   IA...Far Southeast SD

   Concerning...Severe Thunderstorm Watch 424...

   Valid 101246Z - 101415Z

   The severe weather threat for Severe Thunderstorm Watch 424
   continues.

   SUMMARY...Threat for isolated hail and damaging wind gusts
   continues. A watch extension may be needed if more southerly storm
   motion continues and additional strengthening occurs.

   DISCUSSION...Recent KFSD radar imagery shows the outflow outrunning
   the northern portion of the line in far southeast SD and adjacent
   far northeast NE. Additionally, the southern portion of the cluster
   has a more multicellular structure consistent with warm-air
   advection over a boundary, suggesting little organization in this
   area of the line as well. In between (roughly over Cedar, Wayne, and
   Dixon Counties in NE) some better organization and faster forward
   storm motion has been noted. While likely still slightly elevated,
   this portion of the line currently poses the highest potential to
   produce damaging wind gusts. Recent storm motion of 45 kt takes this
   portion of the line to the NE/IA border around 13Z. Additionally, if
   the current motion continues, the line could reach the southern edge
   of Severe Thunderstorm Watch 424 by 13-1330Z. As a result, a local
   extension may be required if trends merit.

   ..Mosier.. 08/10/2020

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

   ATTN...WFO...DMX...FSD...OAX...

   LAT...LON   42859747 42959630 42579512 41799552 41969759 42859747