Storm Prediction Center Mesoscale Discussion 1360

   Mesoscale Discussion 1360
   NWS Storm Prediction Center Norman OK
   0311 PM CDT Fri Jun 21 2024

   Areas affected...the Four Corners Area and eastern UT vicinity

   Concerning...Severe Thunderstorm Watch 441...

   Valid 212011Z - 212145Z

   The severe weather threat for Severe Thunderstorm Watch 441
   continues.

   SUMMARY...An isolated severe hail and wind threat should continue
   for the next several hours as single cells and a few supercells
   spread slowly east-northeastward, mainly affecting the eastern Utah
   to Four Corners Area.

   DISCUSSION...Scattered to numerous thunderstorms are ongoing across
   the eastern Great Basin to southern/central Rockies region. The most
   intense storm has been a persistent slow-moving supercell along the
   AZ/UT border area near Page. Significant severe hail from 2-2.5
   inches in diameter and even a brief tornado will be possible as this
   storm moves along the Lake Powell to Glen Canyon vicinity over the
   next couple hours. A few additional supercells should develop over
   eastern UT into the Four Corners vicinity amid MLCAPE of 1000-1500
   J/kg and effective bulk shear of 40-50 kts. Convection across
   west-central CO in the Grand Junction vicinity may tend to struggle
   owing to the limit period of heating between morning convection and
   renewed development this afternoon.

   ..Grams.. 06/21/2024

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

   ATTN...WFO...ABQ...RIW...GJT...FGZ...SLC...

   LAT...LON   36600889 35540758 35020768 34750859 35421036 36311174
               37571201 39321139 40491080 41080939 41020868 38020872
               36600889