Mesoscale Discussion 1276
   NWS Storm Prediction Center Norman OK
   0516 PM CDT Fri Jun 13 2025

   Areas affected...Parts of central MT

   Concerning...Severe Thunderstorm Watch 411...

   Valid 132216Z - 132345Z

   The severe weather threat for Severe Thunderstorm Watch 411
   continues.

   SUMMARY...Supercells will spread eastward with time, with a threat
   of large to very large hail, localized severe gusts, and possibly a
   tornado.

   DISCUSSION...Several supercells are ongoing late this afternoon
   across central MT. Strong deep-layer shear (effective shear of
   greater than 50 kt) and gradually increasing low-level moisture and
   buoyancy with eastward extent will help to maintain these supercells
   as they move eastward through late afternoon. 2-inch hail was
   reported earlier in Wheatland County, and elongated hodographs and
   favorable storm mode will continue to support large to very large
   hail potential. Localized severe gusts of 60-80 mph will also be
   possible. Low-level flow is relatively weak, but backed surface
   winds, relatively favorable low-level moisture, and effective SRH
   approaching 100 m2/s2 will also support some tornado potential with
   the strongest cells.

   ..Dean.. 06/13/2025

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

   ATTN...WFO...BYZ...GGW...TFX...

   LAT...LON   45981036 47380848 47520747 47270689 46970677 46450704
               46110763 45700856 45601034 45981036 

   MOST PROBABLE PEAK TORNADO INTENSITY...85-115 MPH
   MOST PROBABLE PEAK WIND GUST...65-80 MPH
   MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN