Storm Prediction Center Mesoscale Discussion 1342

   Mesoscale Discussion 1342
   NWS Storm Prediction Center Norman OK
   0652 PM CDT Fri Jun 26 2026

   Areas affected...parts of eastern Colorado...western Nebraska and
   adjacent portions of the high plains

   Concerning...Severe Thunderstorm Watch 398...

   Valid 262352Z - 270145Z

   The severe weather threat for Severe Thunderstorm Watch 398
   continues.

   SUMMARY...Widely scattered strong storms posing a risk for severe
   hail and wind will probably continue through 7-8 PM MDT, before
   tending to diminish across much of the region.

   DISCUSSION...Isolated to widely scattered strong thunderstorm
   development continues to propagate into the plains, in the presence
   of modest, but sheared, 20-25 kt southwesterly deep-layer mean flow.
    This is where a seasonably moist boundary layer has become
   characterized by moderate CAPE within a narrow corridor centered
   near the Kansas/Nebraska state border into western Nebraska. 
   Increasingly warm elevated mixed-layer air continues to advect
   across the high plains, however, and the onset of boundary-layer
   cooling will begin to increase inhibition through 00-02Z.  Height
   rises further aloft are forecast to only slowly weaken and shift
   eastward through late evening.  

   Stronger thunderstorm development currently near Scottsbluff NE
   seems to have best potential to be maintained beyond the next couple
   of hours, as low-level wind fields and shear strengthen this evening
   in closer proximity to the deepening surface cyclone across Wyoming.

   ..Kerr.. 06/26/2026

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

   ATTN...WFO...LBF...GLD...PUB...BOU...CYS...

   LAT...LON   42870370 42900196 42220169 41160198 40590207 39610229
               37990228 37040290 38490372 39720339 40990373 42870370 

   MOST PROBABLE PEAK WIND GUST...65-80 MPH
   MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN