Storm Prediction Center Mesoscale Discussion 1316

   Mesoscale Discussion 1316
   NWS Storm Prediction Center Norman OK
   0346 PM CDT Thu Jun 25 2026

   Areas affected...Central to southeast Wyoming

   Concerning...Severe Thunderstorm Watch 391...

   Valid 252046Z - 252245Z

   The severe weather threat for Severe Thunderstorm Watch 391
   continues.

   SUMMARY...The potential for severe winds will continue into
   southeast Wyoming over the next few hours. Wind gusts between 60-70
   mph appear possible.

   DISCUSSION...A loosely organized MCS continues to push
   east/southeast across central WY and has a history of producing wind
   gusts mostly between 35-55 mph. Over the past half hour, GOES IR
   imagery has shown steadily cooling cloud-top temperatures, implying
   a slow strengthening trend as the downstream air mass continues to
   warm and destabilize. Consequently, outflow wind speeds with the MCS
   may increase into the 60-70 mph range over the next couple of hours
   as the band moves into southeast WY. Based on recent velocity
   imagery, downstream low-level lapse rates, and time-lagged HRRR/RRFS
   ensembles, the greatest wind threat will most likely emerge between
   the I-80 to I-25 corridors over the next 1-2 hours before the MCS
   begins to push into a cooler, more stable air mass in place along
   the WY/NE border.

   ..Moore.. 06/25/2026

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

   ATTN...WFO...CYS...RIW...

   LAT...LON   41130628 41330780 41490822 41620849 41880834 42090791
               42380756 42730727 43150697 43370658 43490612 43440459
               42650458 41970498 41570535 41310573 41130628 

   MOST PROBABLE PEAK WIND GUST...55-70 MPH
   MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN