Mesoscale Discussion 1842
   NWS Storm Prediction Center Norman OK
   0100 AM CST Sun Dec 13 2020

   Areas affected...southeastern Colorado...southwestern Kansas...the
   Oklahoma Panhandle and northern portions of the Texas
   Panhandle...and northwestern Oklahoma

   Concerning...Heavy snow 

   Valid 130700Z - 131300Z

   SUMMARY...Snowfall rates near, or locally slightly in excess of, 1"
   per hour will likely spread across the discussion area over the next
   3 to 6 hours.

   DISCUSSION...Heavy snow -- aided by easterly low-level upslope flow
   -- has been falling for several hours across the Sangre de Cristo
   mountains of southeastern Colorado, and will continue at rates in
   excess of 1" per hour as an upper low over the southern Rockies
   shifts east-southeastward into the southern High Plains with time.

   As the low progresses, snowfall will continue spreading across
   southeastern Colorado into southwestern Kansas and portions of the
   Texas and Oklahoma Panhandles, where temperatures are now near or
   just below freezing.

   Aided by increasing large-scale ascent as the upper low progresses
   east-southeastward, expect coverage and intensity of precipitation
   ongoing across portions of the discussion area to increase gradually
   through the early morning hours.  Additionally, model point forecast
   soundings hint at the potential for very weak CAPE through the
   favored dendritic growth zone, which suggests some convective
   enhancement may allow rates to exceed an inch per hour locally, at
   times.  Currently, it would appear that the heaviest snowfall over
   the next few hours may occur over southwestern Kansas and into the
   Oklahoma Panhandle, southeastward into northeastern portions of the
   Texas Panhandle and adjacent northwestern Oklahoma, where radar is
   exhibiting hints of a deformation band evolving across this area.

   ..Goss.. 12/13/2020

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

   ATTN...WFO...ICT...OUN...DDC...AMA...PUB...

   LAT...LON   37890161 37090255 36370245 35480162 35649919 37199833
               37929969 37890161