Mesoscale Discussion 0507
   NWS Storm Prediction Center Norman OK
   0358 PM CDT Thu Apr 30 2020

   Areas affected...portions of the intermountain west

   Concerning...Severe potential...Watch unlikely 

   Valid 302058Z - 302230Z

   Probability of Watch Issuance...20 percent

   SUMMARY...Widely scattered strong to severe thunderstorms across
   portions of  Idaho and northern Utah will be capable of damaging
   wind gusts and some severe hail through the afternoon and early
   evening.

   DISCUSSION...A few strong to severe storms have matured across Idaho
   this afternoon owing to lift and shear from an impinging shortwave
   trough and mid-level jet over the Great Basin. MLCAPE of 500 J/kg
   and steep low-level lapse rates will continue to support isolated
   severe weather for the next few hours. 

   Stronger cells have formed near BOI along the Snake River Valley rim
   and are expected to push east northeast. KCBX shows enhanced
   velocities along the leading edge of these cells and some severe
   wind gusts owing to downward momentum transfer from the mid-level
   jet and dry sub-cloud layers, will be possible. 

   Further to the south and east storms have exhibited supercellular
   characteristics near Pocatello. Strong wind gusts from higher LCLs
   and occasional severe hail will be likely with these storms through
   the early evening. Convection should gradually weaken this evening
   with the loss of daytime heating and a weather watch is not
   expected.

   ..Lyons/Hart.. 04/30/2020

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

   ATTN...WFO...SLC...PIH...BOI...LKN...

   LAT...LON   44051743 44491630 44631524 44331391 44181336 44061287
               43941223 43791191 43591152 43361118 43151111 42601111
               42261122 41811126 41561164 41521200 41301340 41421440
               41471504 41521573 41651677 41651741 41871771 42461788
               43661771 43761766 44051743