Mesoscale Discussion 1541
   NWS Storm Prediction Center Norman OK
   0747 PM CDT Fri Aug 21 2020

   Areas affected...Parts of central and southwestern Minnesota

   Concerning...Severe Thunderstorm Watch 447...

   Valid 220047Z - 220245Z

   The severe weather threat for Severe Thunderstorm Watch 447
   continues.

   SUMMARY...An organizing cluster of thunderstorms may pose increasing
   severe wind potential while advancing southeastward across parts of
   central and southwestern Minnesota through 9-11 PM CDT.

   DISCUSSION...Intense thunderstorm development has been maintained
   near the MCV, with a gradual upscale growth underway as new storms
   form along consolidating surface cold pools.  A broadening area of
   50+ kt rear inflow is evident at mid-levels (around 10,000 feet) to
   the south of the MCV, and surface gusts to 41 kts have been observed
   at Appleton.  Given continuing inflow of boundary-layer air with
   surface dew points around 70F, supportive of very large CAPE in
   excess of 3000 J/kg, further upscale growth and intensification
   still seems probable during the next couple of hours.  Aided by
   modestly steep lower/mid tropospheric lapse rates and precipitation
   loading, potential for strong to severe surface gusts probably will
   increase as well.  Although ongoing activity is advancing eastward
   around 20-25 mph, there may be a tendency to accelerate eastward and
   southeastward toward the Minneapolis and Mankato vicinities through
   02-04Z.

   ..Kerr.. 08/22/2020

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

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

   LAT...LON   45829521 45339381 44509354 43959412 44259526 44359576
               45029527 45829521