Mesoscale Discussion 1676
   NWS Storm Prediction Center Norman OK
   1126 PM CDT Sat Sep 05 2020

   Areas affected...Southern MN...Northern/Eastern IA

   Concerning...Severe Thunderstorm Watch 486...

   Valid 060426Z - 060600Z

   The severe weather threat for Severe Thunderstorm Watch 486
   continues.

   SUMMARY...Hail threat continues with storms tonight.

   DISCUSSION...Large-scale forcing for ascent appears to be spreading
   rapidly southeast across the upper Red River Valley region ahead of
   a digging short-wave trough. Numerous elevated thunderstorms have
   developed in response to a strengthening LLJ which should continue
   to feed convection as it propagates southeast into northern IA over
   the next few hours. Latest radar data suggests several severe hail
   cores have developed within maturing convection across northern
   portions of ww486, and this should continue well into the pre dawn
   hours with some clustering likely. Severe threat remains primarily
   large hail.

   ..Darrow.. 09/06/2020

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

   ATTN...WFO...DVN...ARX...MPX...DMX...FSD...

   LAT...LON   43529610 45559607 42999134 40979137 43529610