Mesoscale Discussion 0464
   NWS Storm Prediction Center Norman OK
   0335 PM CDT Sat May 19 2018

   Areas affected...southeast Missouri...northeast Arkansas...northwest
   Tennessee and far western Kentucky

   Concerning...Severe Thunderstorm Watch 107...

   Valid 192035Z - 192200Z

   The severe weather threat for Severe Thunderstorm Watch 107
   continues.

   SUMMARY...Threat for large hail and damaging wind will persist into
   the early evening from southeast Missouri into northeast Arkansas,
   west Tennessee and far west Kentucky.

   DISCUSSION...Modest southwesterly low-level winds continue to
   promote an influx of higher theta-e air from a moderately unstable
   warm sector into the region north of a convectively enhanced front
   that extends from southwest MO into northwest TN. The resulting
   isentropic ascent and destabilization associated with this process
   is supporting storm development north of the boundary from southeast
   MO into western TN. Some organized multicell structures continue to
   be observed within the line over southern MO, while discrete
   multicells continue over western TN. These storms will remain
   capable of a few instances of large hail and damaging wind next
   couple hours. There is some potential for additional storms to
   develop in the immediate wake of the squall line, but confidence in
   this scenario is low given tendency for shortwave ridge to build
   into this region.

   ..Dial.. 05/19/2018

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

   ATTN...WFO...PAH...MEG...LSX...SGF...

   LAT...LON   37239079 37299000 36808879 36268848 35568907 35819025
               36279108 36729149 37239079