Mesoscale Discussion 0957
   NWS Storm Prediction Center Norman OK
   0646 PM CDT Sun Jun 02 2019

   Areas affected...Southeast Wyoming...The Nebraska Panhandle...and
   far southwest South Dakota

   Concerning...Severe Thunderstorm Watch 316...320...

   Valid 022346Z - 030115Z

   The severe weather threat for Severe Thunderstorm Watch 316, 320
   continues.

   SUMMARY...The severe threat continues in severe thunderstorm watch
   316 and 310 with a primary threat of large hail.

   DISCUSSION...A combination of supercell and multicell thunderstorms
   continue from southeast Wyoming into far southern South Dakota.
   Storms farther south have been more unorganized and more
   multicellular thus far while storms farther north have been more
   supercellular. This closely follows the RAP and VWP effective shear
   which shows around 25 knots near Cheyenne increasing to 40 knots in
   far southern South Dakota. Therefore, expect the most persistent and
   most intense storms to remain in the northern Nebraska panhandle
   into southern South Dakota, where the combination of instability and
   shear is maximized. Guidance has been consistent congealing the
   supercells in southern South Dakota into an MCS that slowly drifts
   southward along the instability gradient after dusk. Very steep
   mid-level lapse rates (8-9 C/km per RAP mesoanalysis) and some
   elevated instability may support some severe threat after dusk, but
   expect the threat to slowly wane into the early overnight hours.

   ..Bentley.. 06/02/2019

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

   ATTN...WFO...ABR...LBF...UNR...BOU...CYS...

   LAT...LON   41000382 40900475 41140533 41800570 42720568 43120529
               43370357 43840207 43940114 43660054 43140013 42320056
               41540173 41210275 41000382