Mesoscale Discussion 0518
   NWS Storm Prediction Center Norman OK
   0236 PM CDT Fri May 25 2018

   Areas affected...North-central and northwestern Nevada...extreme
   southwestern Idaho...portions of southeastern Oregon

   Concerning...Severe potential...Watch unlikely 

   Valid 251936Z - 252130Z

   Probability of Watch Issuance...20 percent

   SUMMARY...A severe wind gust and isolated hail risk will exist with
   the strongest storms in the discussion area. A WW is not anticipated
   at this time.

   DISCUSSION...Surface heating and the approach of a mid-level trough
   have led to storm development in northwestern Nevada. With dewpoints
   in the upper-40s to low-50s, MUCAPE values have risen to 1000-2000
   J/kg. Effective bulk-shear values within the area are generally
   25-30 kts. A risk for severe wind gusts as well as isolated hail
   with the strongest storms will exist this afternoon. While initial
   development will be semi-discrete, with time storms should congeal
   into an MCS. The threats with these storms should preclude a WW
   issuance.

   ..Wendt/Hart.. 05/25/2018

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

   ATTN...WFO...BOI...LKN...REV...MFR...

   LAT...LON   42782010 43021938 43141791 42841659 42381627 41601624
               40961644 40641776 40611837 41001907 41751989 42422010
               42782010