Mesoscale Discussion 1556
   NWS Storm Prediction Center Norman OK
   0335 PM CDT Wed Aug 18 2021

   Areas affected...Central Utah

   Concerning...Severe Thunderstorm Watch 448...

   Valid 182035Z - 182230Z

   The severe weather threat for Severe Thunderstorm Watch 448
   continues.

   SUMMARY...The severe wind potential continues across WW 448 as
   thunderstorms continue to increase in coverage.

   DISCUSSION...Radar trends over the past hour have shown an increase
   in thunderstorm coverage across central to southern Utah along and
   ahead of a cold front that is slowly migrating to the
   south/southeast. While most storms have been transient in nature, a
   few have shown signs of organization with strong downdrafts, and a
   53 mph wind gust was recently noted in central UT associated with a
   strong thunderstorm. The overall thermodynamic and kinematic
   environment remains supportive for transient organized convection,
   and low-level lapse rates have steepened to near 10 C/km (per recent
   mesoanalysis estimates) across west and east-central UT where
   temperatures have warmed into the upper 80s. Favorable lift will
   remain over the region heading into the evening hours, so the severe
   wind potential will continue - especially across the aforementioned
   areas with the steepest boundary-layer lapse rates.

   ..Moore.. 08/18/2021

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

   ATTN...WFO...GJT...SLC...VEF...

   LAT...LON   38611409 38811328 39361197 39631090 39530962 39130927
               38480939 38050999 37591090 37431153 37391269 37491337
               37731401 38111423 38611409