Mesoscale Discussion 0393
   NWS Storm Prediction Center Norman OK
   0917 PM CDT Thu Apr 16 2020

   Areas affected...southeast Nebraska

   Concerning...Heavy snow 

   Valid 170217Z - 170515Z

   SUMMARY...A developing snow band across southeast Nebraska may bring
   periods of heavy snow with snowfall rates between 1-2 inches per
   hour over the next 1-3 hours.

   DISCUSSION...Recent radar trends show a strengthening snow band
   across southeast NE that is associated with continued frontogenesis
   and deformation/confluence within the 850-700 mb layer. ASOS surface
   observations from the region show visibility dropping to below one
   mile with moderate snow reported, suggesting that this band is
   producing at least pockets of heavy snow rates. Snowfall rates of
   1-2 inches per hour will continue to be possible over the next 1-3
   hours as this band translates to the east in tandem with the main
   mid level trough axis. However, as the low-mid level baroclinic zone
   and frontogenetical forcing for ascent become increasingly displaced
   to the south, the band will primarily be driven by relatively weak
   mid level deformation along the trough axis. As such, a gradual
   weakening is expected as the band moves towards the IA border.

   ..Moore/Goss.. 04/17/2020

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

   ATTN...WFO...EAX...OAX...GID...

   LAT...LON   40009851 40079891 40459908 40919889 41449766 41629641
               41519603 40639578 40249553 40059548 40009559 40009851