Storm Prediction Center Mesoscale Discussion 2230

   Mesoscale Discussion 2230
   NWS Storm Prediction Center Norman OK
   1049 AM CST Tue Nov 25 2025

   Areas affected...Northeast South Dakota...southeast North
   Dakota...west-central Minnesota

   Concerning...Heavy snow 

   Valid 251649Z - 252145Z

   SUMMARY...Potential for moderate to heavy (around 1 inch per hour
   rates) snowfall is expected to increase through the afternoon as the
   upper trough intensifies and the surface low deepens in the Upper
   Midwest.

   DISCUSSION...An amplifying trough is evident on water vapor imagery
   in the northern Plains. As this features continues into the Upper
   Midwest, a surface low now analyzed in eastern South Dakota should
   deepen and generally shift eastward. Ascent from low to mid levels
   will promote a region of heavier precipitation. Recent observations
   from northeast South Dakota showed heavy snow occurring.
   Temperatures farther east are currently above freezing, but between
   low-level cold air advection and diabatic cooling within the heavier
   precipitation bands, moderate to occasionally heavy snowfall rates
   (around 1 inch per hour) are probable into the mid/late afternoon.

   ..Wendt.. 11/25/2025

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

   ATTN...WFO...MPX...FGF...ABR...BIS...

   LAT...LON   45219667 45239786 45379822 45479836 45579847 46039827
               46349762 46619644 46459568 46279519 45809528 45609558
               45439591 45219667