Mesoscale Discussion 0904
   NWS Storm Prediction Center Norman OK
   0645 PM CDT Wed Jun 10 2020

   Areas affected...eastern Kentucky...far southern Ohio...southwest
   West Virginia

   Concerning...Severe Thunderstorm Watch 278...279...

   Valid 102345Z - 110115Z

   The severe weather threat for Severe Thunderstorm Watch 278, 279
   continues.

   SUMMARY...A broken line of storms continues to move east-northeast
   across eastern Kentucky. Marginally severe hail/wind are the main
   threats with these storms and they are likely to move outside the
   watch in the next 1-2 hours. A watch extension of WW278 and WW279
   may be necessary.

   DISCUSSION...Cell motions are to the northeast with the line moving
   more east-northeast across eastern Kentucky along/ahead of a
   pre-frontal trough extending north-south across the Great Lakes/Ohio
   Valley. As the upper-level shortwave trough begins to pivot more to
   the northeast over the southern Great Lakes, the stronger
   flow/forcing for ascent will begin to lift northeast as well.
   However, strong enough flow remains to support 30-40 knots of
   effective bulk shear, and heights are continuing to fall along/just
   ahead of the current line of storms. The cold pool is weaker across
   this southern part of the line than farther north across Ohio, also
   indicating lower-end severe potential. Insolation and surface
   dewpoints in the low 70s F have resulted in MLCAPE of 1000-2000 J/kg
   and while longer term trends are working against severe potential,
   marginally severe storms could continue across this area for the
   next 1-3 hours. Given this temporal/spatial window, a local watch
   extension to WW278 and WW279 may be necessary, but the bulk of the
   storms should move into the current configuration of WW279.

   ..Nauslar/Thompson.. 06/10/2020

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

   ATTN...WFO...RLX...JKL...ILN...

   LAT...LON   37628194 38118162 38758154 39018176 39038223 38578333
               38118333 37708355 37368378 37228376 37218350 37288288
               37468234 37628194