Storm Prediction Center Mesoscale Discussion 282

   Mesoscale Discussion 0282
   NWS Storm Prediction Center Norman OK
   0233 PM CDT Sat Mar 29 2025

   Areas affected...Parts of northern NE into southern SD

   Concerning...Heavy snow 

   Valid 291933Z - 292230Z

   SUMMARY...Occasional snow rates of locally greater than 1 inch per
   hour are possible this afternoon.

   DISCUSSION...A band of moderate to locally heavy precipitation is
   ongoing early this afternoon from western NE into western/central
   SD, with observations indicating a mix of snow, sleet, and
   rain/freezing rain ongoing across the region. This precipitation
   band is associated with a negatively tilted midlevel shortwave
   trough ejecting northeastward across central Great Plains.
   Frontogenesis near/above 700 mb will continue to support strong
   midlevel ascent that will extend through the dendritic growth zone,
   resulting the potential for at least localized heavy snow rates this
   afternoon. 

   Marginal low-level temperatures will tend to delay the changeover to
   snow and limit snow-to-liquid ratios in some areas, but snow may
   increase near/above 1 inch per hour in areas that experience the
   heaviest precip rates. In addition, weak MUCAPE will support
   potential for occasional lightning and convective enhancement of
   rates along the eastern periphery of heavier precipitation, as the
   primary midlevel vorticity maximum moves northeastward. Some areas
   outside of the heaviest snow band may continue to experience
   occasional freezing rain and/or sleet through the afternoon.

   ..Dean.. 03/29/2025

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

   ATTN...WFO...FSD...ABR...LBF...UNR...

   LAT...LON   42820171 43680095 44230015 44339917 43969889 43509892
               42819954 42000045 41950095 41990113 42000161 42130179
               42820171