Storm Prediction Center Mesoscale Discussion 2261

   Mesoscale Discussion 2261
   NWS Storm Prediction Center Norman OK
   1102 PM CDT Sun Sep 06 2026

   Areas affected...parts of north central Montana

   Concerning...Severe Thunderstorm Watch 662...

   Valid 070402Z - 070500Z

   The severe weather threat for Severe Thunderstorm Watch 662
   continues.

   SUMMARY...Some further intensification of storms appears possible,
   perhaps including a small evolving organized cluster accompanied by
   strong surface gusts across the Malta through international border
   vicinity of north central Montana by 11 PM-1 AM MDT.

   DISCUSSION...A couple of stronger storms have generally maintained
   vigorous intensity over the past few hours while propagating north
   of Lewistown toward the international border, with supporting
   mid/upper forcing for ascent.  Based on latest surface and objective
   analysis, mid 60s F surface dew points around the Malta vicinity may
   still provide potential for increasingly unstable updraft inflow
   over the next couple of hours.  This could be accompanied by further
   thunderstorm intensification, perhaps including the evolution of a
   small organizing cluster with potential to produce a bit broader
   swath of strong to severe gusts.  It appears that this probably will
   remain west of Glasgow, impacting mainly Blaine and Phillips
   counties before progressing across the international border
   overnight.

   ..Kerr.. 09/07/2026

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

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

   LAT...LON   47760914 48410931 49190961 49280852 48460779 47860775
               47510868 47760914 

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