Mesoscale Discussion 1327
   NWS Storm Prediction Center Norman OK
   0624 PM CDT Thu Jul 23 2020

   Areas affected...Central Montana

   Concerning...Severe Thunderstorm Watch 398...

   Valid 232324Z - 240130Z

   The severe weather threat for Severe Thunderstorm Watch 398
   continues.

   SUMMARY...An isolated severe threat will be possible for a couple
   more hours this evening. Wind damage and hail will be the primary
   threats.

   DISCUSSION...The latest volumetric radar imagery out of Great Falls,
   Montana shows scattered thunderstorms to the east of Great Falls
   extending southward into south-central Montana. The RAP suggests
   that instability is relatively weak across central Montana with
   SBCAPE values generally estimated to be in the 500 to 1000 J/kg
   range. In addition, RAP forecast soundings in central Montana have
   850 to 500 mb lapse rates near 8.0 C/km with 0-6 km shear in the 25
   to 30 kt range. This could be enough for a severe threat for a
   couple more hours this evening. Although storm mode is expected to
   remain multicell, wind damage will be possible with the more
   organized line segments. Hail will also be possible with the
   stronger cores.

   ..Broyles.. 07/23/2020

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

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

   LAT...LON   48381123 47501102 46051033 45260993 45120926 45430841
               46300822 47270866 48370940 48651002 48381123