Mesoscale Discussion 1491
   NWS Storm Prediction Center Norman OK
   0453 PM CDT Fri Aug 14 2020

   Areas affected...MN

   Concerning...Tornado Watch 437...

   Valid 142153Z - 142330Z

   The severe weather threat for Tornado Watch 437 continues.

   SUMMARY...Severe threat continues across central and eastern
   portions of ww437. New ww may be required soon downstream.

   DISCUSSION...Leading edge of large-scale forcing for ascent is
   spreading quickly east across the upper MS Valley ahead of a strong
   short-wave trough that is currently located along the MN/Dakota
   border. Surface low is lifting northeast into western ON and this
   should allow the warm sector to advance north across portions of the
   MN Arrowhead over the next few hours. This baroclinic zone will
   remain the primary focus for downstream development over the next
   few hours.

   Scattered storms continue ahead of the cold front across the body of
   ww437. This activity will spread/develop northeast over the next few
   hours, with the leading portion of this convection expected to exit
   eastern portions of the tornado watch over the next 1-1.5hr.

   ..Darrow.. 08/14/2020

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

   ATTN...WFO...DLH...MPX...FGF...FSD...ABR...

   LAT...LON   44389631 46199666 46229415 44379386 44389631