Mesoscale Discussion 2061
   NWS Storm Prediction Center Norman OK
   0526 PM CST Sun Dec 26 2021

   Areas affected...east-central Minnesota into northwest Wisconsin

   Concerning...Heavy snow 

   Valid 262326Z - 270530Z

   SUMMARY...Heavy snow rates of at least 1"/hr are likely to develop
   this evening over east-central Minnesota, expanding across much of
   northwest Wisconsin overnight. Rates near 2"/hr may briefly occur in
   spots.

   DISCUSSION...Warm advection just above the surface will continue to
   increase across the region this evening, with moistening and
   eventually saturating profiles resulting in areas of heavy snow.

   Observations at 23Z indicate mainly light snow falling across
   western and southern MN where the boundary layer is in the process
   of saturating. Other light echoes, primarily aloft, were noted into
   western WI.

   Forecast model soundings from RAP and NAM indicate that the dry
   layer below 700 mb will saturate around 01 or 02Z near the
   Mississippi River, and around 03 or 04Z farther north into
   Wisconsin, with heavy snow rates in excess of 1"/hr possible as this
   occurs. Strong midlevel lift enhanced by deep-layer frontogenesis,
   coupled with perhaps as much as 100 J/kg MUCAPE rooted near 700 mb
   will aid snow rates. Greatest axis of lift will move northeastward
   with time, and 1-2"/hr rates may occur for a brief period prior to
   an abrupt end/drying from the west.

   ..Jewell.. 12/26/2021

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

   ATTN...WFO...GRB...MKX...DLH...ARX...MPX...

   LAT...LON   44489279 45159419 45579438 46029377 46169294 46249223
               46109119 45869032 45688997 44738944 43898909 43508917
               43388967 43559036 43829079 44059151 44269231 44489279