Mesoscale Discussion 1421
   NWS Storm Prediction Center Norman OK
   1125 PM CDT Fri Aug 07 2020

   Areas affected...east-central Minnesota and adjacent northwestern
   Wisconsin

   Concerning...Severe Thunderstorm Watch 420...

   Valid 080425Z - 080600Z

   The severe weather threat for Severe Thunderstorm Watch 420
   continues.

   SUMMARY...Local severe risk persists with one or two of the more
   intense/remaining storms, but will continue to gradually diminish
   over the next 1 to 2 hours.

   DISCUSSION...Latest radar loop shows a small cluster of storms
   persisting in conjunction with the continued eastward advance of a
   well-defined mesoscale circulation/MCV, now approaching the
   Arrowhead region of Minnesota.  Instability diminishes steadily
   downstream from the ongoing storms into Wisconsin and western Lake
   Superior, which suggests a continued decrease in convective
   intensity.  The strongest storms remain now on the southern and
   southwestern flanks of the MCV circulation, where greater
   instability is combining with a southwesterly low-level-jet-induced
   zone of warm advection to yield this favored zone of persistent
   convective redevelopment.

   With that said, as the system shifts eastward with time, and capping
   continues to increase with respect to surface-based parcels, storms
   will continue to weaken and trend toward becoming more elevated. 
   This suggests that the notable decrease in convective intensity
   which has occurred over the past hour will continue, and should
   preclude any need for a new WW beyond the scheduled 06Z expiration
   of WW 420.

   ..Goss.. 08/08/2020

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

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

   LAT...LON   46909410 46739196 45469206 45159304 45309468 46399482
               46909410