Mesoscale Discussion 0772
   NWS Storm Prediction Center Norman OK
   0338 AM CDT Sun May 31 2020

   Areas affected...Portions of northeastern OR...southeastern WA...and
   western ID

   Concerning...Severe potential...Watch unlikely 

   Valid 310838Z - 311045Z

   Probability of Watch Issuance...20 percent

   SUMMARY...An isolated threat for large hail and strong/gusty winds
   may continue through the early morning. Watch issuance appears
   unlikely at this time.

   DISCUSSION...An elevated supercell has recently strengthened across
   far northeastern OR as a pronounced shortwave trough moves
   northeastward across the interior Pacific Northwest. Additional
   storms have also formed across parts of eastern OR into western ID
   as substantial mid-level cooling and large-scale ascent preceding
   the shortwave trough overspread this area. Strong deep-layer shear
   will support organized convection through the early morning hours,
   with isolated large hail possible with any supercell that can
   persist in the marginal thermodynamic environment. Cool surface
   temperatures and rather limited low-level moisture are resulting in
   a large amount of convective inhibition immediately downstream of
   ongoing storms. This will probably tend to limit the severe wind
   threat, but occasional strong/gusty downdraft winds may still occur
   if storms congeal into a small cluster/bow while moving quickly
   north-northeastward. With the overall severe threat expected to
   remain marginal for at least the next couple of hours, watch
   issuance is unlikely.

   ..Gleason/Edwards.. 05/31/2020

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

   ATTN...WFO...MSO...BOI...OTX...PDT...

   LAT...LON   43441679 44971789 46031825 46721820 46761700 46581596
               45711510 44321543 43391596 43441679