Mesoscale Discussion 1166
   NWS Storm Prediction Center Norman OK
   0546 PM CDT Thu Jun 20 2019

   Areas affected...south-central Minnesota

   Concerning...Severe potential...Watch possible 

   Valid 202246Z - 202345Z

   Probability of Watch Issuance...40 percent

   SUMMARY...A cluster of strong to severe thunderstorms persists
   across Redwood/Brown counties currently.  A WW is being considered,
   and trends will continue to be monitored.

   DISCUSSION...Storms in the discussion area have evolved into a small
   cluster of semi-discrete cells.  These storms are in an environment
   characterized by moderate instability and relatively weak low-level
   shear, though it appears that cells have recently favorably
   interacted with a warm front/stationary boundary in the region and
   acquired occasional updraft rotation.  This has results in
   occasional instances of large hail, funnel clouds, and even a brief
   tornado within the past 15 minutes or so.  Storms have also taken on
   a rightward-moving component as well, with updraft motion along the
   boundary suggestive of possible persistence toward the MN/IA border
   through the evening. 

   Given these trends, a WW issuance may be needed especially if storms
   maintain their intensity.

   ..Cook/Kerr.. 06/20/2019

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

   ATTN...WFO...MPX...DMX...FSD...

   LAT...LON   44789562 44799510 44539434 44009375 43609365 43439411
               43519490 43829551 44309575 44589573 44789562