Mesoscale Discussion 2153
   NWS Storm Prediction Center Norman OK
   0842 PM CST Mon Nov 25 2019

   Areas affected...Portions of the Front Range and I-25 corridor

   Concerning...Heavy snow 

   Valid 260242Z - 260845Z

   SUMMARY...Snowfall rates will increase tonight along the Front Range
   and I-25 corridor. Snowfall rates of 1-2 inches per hour are likely
   with 3+ inches per hour possible under the heaviest bands.

   DISCUSSION...Snow has been falling within a region of frontogenesis
   and upslope flow across the Front Range and adjacent I-25 corridor
   since 20-21z with snowfall reports of 3-5+ inches per NWS BOU/CYS.
   An upper-level shortwave trough is amplifying over the Intermountain
   West with the upper low now located over northern Utah with
   substantial IR cloud-top cooling ahead of it. As this wave further
   amplifies and shifts eastward, lapse rates will steepen with
   stronger forcing for ascent and intensifying isentropic lift and
   frontogenesis over the Front Range and adjacent High Plains. This
   will result in heavy snow with snowfall rates of 1-2 inches per hour
   between 03-10z with locally higher snowfall rates of 3+ inches per
   hour.

   ..Nauslar/Grams.. 11/26/2019

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

   ATTN...WFO...BOU...CYS...

   LAT...LON   40290561 40810566 41300569 41490524 41480448 41320398
               40810403 40030413 39680422 39320460 39330543 39510562
               40290561