Mesoscale Discussion 1818
   NWS Storm Prediction Center Norman OK
   1120 PM CDT Sat Oct 09 2021

   Areas affected...Southwestern-Central MN

   Concerning...Severe Thunderstorm Watch 515...

   Valid 100420Z - 100615Z

   The severe weather threat for Severe Thunderstorm Watch 515
   continues.

   SUMMARY...Strong convection will continue along a corridor from
   southwestern through central MN. Locally damaging winds are the
   primary risk for the next few hours.

   DISCUSSION...Earlier MCS that formed over eastern SD has advanced
   downstream and weakened somewhat as surface low is now lifting north
   across southeast ND. However, a southwest-northeast corridor of
   strong storms continues across MN, strongly influenced by low-level
   warm advection in association with 40-50kt LLJ. Latest
   satellite/radar data depict a well-defined upper vort over Hand
   County SD approaching the southwestern flank of MN convection. This
   feature will likely contribute to the maintenance of thunderstorm
   activity across the upper MS Valley during the pre-dawn hours. Given
   the observed shear within the warm advection zone, there is some
   concern for a few strong/locally severe storms. While this activity
   has not been particularly productive over the last few hours, some
   severe threat will linger due to the shear/forcing.

   ..Darrow.. 10/10/2021

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

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

   LAT...LON   44799657 45969529 46979464 47489399 46629345 45219427
               44539560 44799657