Mesoscale Discussion 1817
   NWS Storm Prediction Center Norman OK
   0827 PM CDT Sat Oct 09 2021

   Areas affected...Southeast ND...West-Central MN

   Concerning...Severe Thunderstorm Watch 514...515...

   Valid 100127Z - 100300Z

   The severe weather threat for Severe Thunderstorm Watch 514, 515
   continues.

   SUMMARY...Damaging winds will accompany a squall line as it races
   northeast this evening.

   DISCUSSION...Well-organized squall line has evolved and is surging
   northeast across the remainder of ww514 into the western portions of
   ww515. An MCV has evolved over the northwestern portion of a larger
   complex of storms over southeast ND, well north of the primary
   surface low. The apex of a larger bow is racing east-northeast
   across Douglas County MN, and should advance across Alexandria very
   shortly. Damaging winds in excess of 50-60kt is likely noted at
   times with this squall line. Strong low-level warm advection is
   focused across west-central/central MN this evening as 45kt LLJ is
   feeding this surging line. Current thinking is the squall line will
   continue to propagate across the remainder of ww515 over the next
   several hours, primarily affecting the northwestern two-thirds of
   the watch.

   ..Darrow.. 10/10/2021

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

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

   LAT...LON   46579713 47009579 46429448 45409503 45189617 45909627
               46579713