Mesoscale Discussion 0653
   NWS Storm Prediction Center Norman OK
   1010 PM CDT Wed May 20 2020

   Areas affected...Northeast Montana

   Concerning...Severe Thunderstorm Watch 197...

   Valid 210310Z - 210445Z

   The severe weather threat for Severe Thunderstorm Watch 197
   continues.

   SUMMARY...Damaging winds and hail are possible with a squall line as
   it races north toward the international border.

   DISCUSSION...MCS has evolved over northeast MT this evening with an
   apparent MCV forming over southeast Garfield County. Latest radar
   data suggests an east-west squall line has begun to surge in excess
   of 50kt as it propagates north across McCone County -- just east of
   the evolving MCV. While some hail remains possible, severe winds are
   likely the main threat with this squall line as it surges toward the
   SK border.

   ..Darrow.. 05/21/2020

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

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

   LAT...LON   49080580 48860821 47600819 47930611 48040449 49080580