Mesoscale Discussion 1307
   NWS Storm Prediction Center Norman OK
   0622 PM CDT Tue Jul 21 2020

   Areas affected...parts of eastern Wyoming/eastern Colorado...into
   portions of the Nebraska Panhandle

   Concerning...Severe Thunderstorm Watch 392...

   Valid 212322Z - 220115Z

   The severe weather threat for Severe Thunderstorm Watch 392
   continues.

   SUMMARY...Isolated storms, and attendant/local severe risk -- mainly
   in the form of damaging wind gusts -- continue across the central
   High Plains region.

   DISCUSSION...Latest radar loop shows isolated storms ongoing across
   portions of the BOU and CYS CWAs at this time, within an airmass
   featuring 1000 to 1500 J/kg mixed-layer CAPE.  The storms are
   initiating both over higher terrain, as a result of
   east-southeasterly upslope low-level flow, and near various outflow
   boundaries emanating from the ongoing storms.  

   Atop the low-level east-southeasterly flow lies a moderate/westerly
   mid-level wind field.  This is contributing to shear sufficient for
   organized/weakly rotating storms.  A few of the most intense cells
   remain capable of producing large hail -- mainly in southeastern
   Wyoming where shear is strongest.  Meanwhile, gusty/locally damaging
   winds -- aided by the deep dry boundary layer -- can also be
   expected.  Storms should begin to diminish gradually by early
   evening.

   ..Goss.. 07/21/2020

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

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

   LAT...LON   42360595 42280484 41830390 39900334 37710350 37760488
               39530484 40380561 42360595