Mesoscale Discussion 0687
   NWS Storm Prediction Center Norman OK
   0920 PM CDT Tue May 07 2024

   Areas affected...Ohio Valley

   Concerning...Tornado Watch 196...197...198...199...

   Valid 080220Z - 080315Z

   The severe weather threat for Tornado Watch 196, 197, 198, 199
   continues.

   SUMMARY...Scattered severe thunderstorms will sag southeast across
   the OH Valley this evening.

   DISCUSSION...Scattered severe thunderstorms, including isolated
   supercells and short-line segments, arc from central OH-southern
   IN-extreme southeast IL. This activity is propagating slowly
   southeast along the northern fringe of greater buoyancy. As the LLJ
   increases across the upper OH Valley later this evening, a more
   eastward shift is expected toward the PA border, though air mass is
   notably less unstable immediately downstream within this
   warm-advection corridor. Several long-lived supercells persist, and
   given the shear, will likely continue, especially from southern IN
   into southern OH.

   ..Darrow.. 05/08/2024

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

   ATTN...WFO...PBZ...RLX...CLE...ILN...LMK...IND...PAH...ILX...

   LAT...LON   39178776 39608452 40338359 41118291 40808179 39158277
               38598486 38408815 39178776