Mesoscale Discussion 1029
   NWS Storm Prediction Center Norman OK
   0707 PM CDT Sat Jun 27 2020

   Areas affected...Northeast Montana

   Concerning...Severe potential...Watch possible 

   Valid 280007Z - 280200Z

   Probability of Watch Issuance...40 percent

   SUMMARY...Strong winds are possible with convection this evening.

   DISCUSSION...Scattered convection has gradually expanded in areal
   coverage along a corridor from southwestern into north-central MT,
   immediately ahead of a weak short-wave trough. The leading edge of
   this high-based convection has gradually organized and a developing
   squall line now arcs from Phillips County - western Garfield County
   - Petroleum County. This activity is surging northeast along the
   leading edge at roughly 40kt. With warm surface temperatures the
   boundary layer has deepened to near 3km and this should prove
   efficient in allowing gusty winds to reach the surface if adequate
   downdrafts are maintained. If this line continues to organize there
   is some consideration for a severe thunderstorm watch.

   ..Darrow/Guyer.. 06/28/2020

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

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

   LAT...LON   48600790 49150586 48430507 47770570 47380731 48600790