Storm Prediction Center Mesoscale Discussion 2260

   Mesoscale Discussion 2260
   NWS Storm Prediction Center Norman OK
   0841 PM CDT Sun Sep 06 2026

   Areas affected...parts of north central Montana

   Concerning...Severe Thunderstorm Watch 662...

   Valid 070141Z - 070345Z

   The severe weather threat for Severe Thunderstorm Watch 662
   continues.

   SUMMARY...Thunderstorms may still intensify as they approach areas
   to the southwest and west of Glasgow through 9-10 PM MDT,
   accompanied by increasing potential for large hail and localized
   severe wind gusts.

   DISCUSSION...Storms thus far have remained fairly small in size and
   of modest intensity, with cells tending to propagate with the
   south-southwesterly cloud-bearing layer mean flow (on the order of
   30 kt).  Through 03-04Z, ongoing cells to the west through
   north-northwest of Lewistown may still acquire more substantively
   unstable updraft inflow as they propagate into areas near and
   southwest through west of Glasgow, where post-frontal surface dew
   points remain in the lower to mid 60s F, perhaps supporting CAPE as
   high as 2000 J/kg.

   ..Kerr.. 09/07/2026

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

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

   LAT...LON   47511061 48420978 48920906 48720797 47470889 46870980
               46771043 47511061 

   MOST PROBABLE PEAK WIND GUST...55-70 MPH
   MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN