Mesoscale Discussion 0174
   NWS Storm Prediction Center Norman OK
   0355 AM CDT Sun Mar 14 2021

   Areas affected...Portions of north-central/northeastern CO into
   southeastern WY...the NE Panhandle...and far southwestern SD

   Concerning...Heavy snow 

   Valid 140855Z - 141500Z

   SUMMARY...Heavy snow will continue this morning. Snowfall rates of
   at least 1-2 inches per hour are expected, with 3-4 inches per hour
   likely in the foothills/mountains. Blizzard conditions may also
   occur in eastern Wyoming and the Nebraska Panhandle.

   DISCUSSION...A deep, closed upper low will continue moving slowly
   eastward over the southern/central Rockies and adjacent High Plains
   this morning. Strong low to mid-level easterly upslope flow will
   persist across much of the Front Range of northern CO and the
   Laramie Mountains in southeastern WY. An ongoing band of moderate to
   heavy snow is expected to continue this morning across much of
   north-central into northeastern CO and southeastern WY. Strong
   ascent associated with a mid/upper-level jet through a deep,
   saturated dendritic growth zone will foster widespread 1-2 inch per
   hour snowfall rates within the band. Terrain enhancement owing to
   the pronounced low-level upslope flow will likely support even
   higher snowfall rates of 3-4 inches per hour along the foothills and
   into the mountains. This heavy snow is expected to continue through
   the morning owing to the slow-moving nature of the overall cyclone,
   while gradually spreading northward into more of eastern WY, the NE
   Panhandle, and eventually southwestern SD. Greatly reduced
   visibilities and potential blizzard conditions owing to blowing snow
   also appear possible across southeastern WY and the western NE
   Panhandle this morning, as the surface pressure gradient should be
   greatest over these areas. Latest guidance suggests that the highest
   snowfall rates through 15Z will focus along the Front Range north of
   Denver towards the Medicine Bow Mountains, Laramie Mountains, and
   Cheyenne.

   ..Gleason.. 03/14/2021

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

   ATTN...WFO...LBF...UNR...BOU...CYS...RIW...

   LAT...LON   41850225 41240289 40690336 40130360 39810365 39440392
               39220523 39410556 40040573 40910609 41760642 42570653
               43020638 43240554 43360446 43280354 43110245 42710192
               42180193 41850225