Mesoscale Discussion 1830
   NWS Storm Prediction Center Norman OK
   0801 PM CST Wed Dec 02 2020

   Areas affected...Southwest Kansas into the eastern Oklahoma and
   northeastern Texas Panhandles

   Concerning...Heavy snow 

   Valid 030201Z - 030700Z

   SUMMARY...Moderate to heavy snow will likely continue across
   southwest Kansas and portions of the eastern Oklahoma and
   northeastern Texas Panhandles. Snowfall rates may exceed one inch
   per hour at times through 07 UTC.

   DISCUSSION...Recent radar trends from southwest KS and the OK/TX
   Panhandles continue to show a broad region of precipitation with a
   loosely organized banded feature roughly in the Pratt, KS to
   Liberal, KS region. Slight frontogensis in the vicinity of the 850
   mb deformation zone along with strong warm advection at the 700 mb
   level are likely the driving mechanisms of this band, and recent RAP
   guidance suggests this forcing will persist for at least the next
   few hours. The 00 UTC DDC sounding suggests that this lift at around
   700 mb is likely within a portion of the dendritic growth zone,
   which may help augment snowfall rates.

   Additionally, recent water-vapor imagery shows the main upper-level
   low continues to gradually pivot to the north/northeast, which will
   maintain broad-scale ascent over northern OK/southern KS. IR imagery
   also continues to show convective elements originating over northern
   OK (where weak elevated instability and 7-8 C/km mid-level lapse
   rates persist per the 00 UTC OUN sounding and RAP Mesoanalysis) that
   are advecting westward into the southwest KS/Panhandles region. The
   cumulative consequence of these features will be a continuation of
   moderate to heavy snowfall over the next several hours. Snowfall
   rates may briefly exceed one inch per hour, especially under any
   convective elements.

   ..Moore.. 12/03/2020

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

   ATTN...WFO...OUN...DDC...AMA...

   LAT...LON   36780155 37430146 37900123 37990065 37989982 37979902
               37679851 37299869 36779912 36359938 36169981 36070035
               36050087 36280144 36780155