SPC AC 210718

   Day 3 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   0218 AM CDT Wed Oct 21 2020

   Valid 231200Z - 241200Z

   ...NO SEVERE THUNDERSTORM AREAS FORECAST...

   ...SUMMARY...
   Severe thunderstorms are not expected across the continental United
   States Friday and Friday night.

   ...DISCUSSION...
   A west-southwest mid-level flow pattern is forecast to be in place
   from the Great Plains to Appalachians on Friday. At the surface, a
   cold front will advance southeastward into the Ohio Valley, mid
   Mississippi Valley and Ozarks. A narrow corridor of instability will
   develop during the afternoon ahead of the front. Model forecasts
   suggest that thunderstorms will be possible along and behind the
   front where instability is forecast to be weak. Isolated
   thunderstorms may also develop along the instability corridor ahead
   of the front. However, deep-layer shear is forecast to remain weak
   in most of the mid Mississippi and Ohio Valleys on Friday,
   suggesting that the environment will not be sufficient for severe
   storms.

   Further southwest into the lower Mississippi Valley, isolated
   thunderstorms may also develop during the mid to late afternoon.
   Although adequate instability is forecast across parts of Louisiana
   and Mississippi in the afternoon, 0-6 km shear should remain near or
   below 30 kt suggesting a severe threat is not likely.

   ..Broyles.. 10/21/2020

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   NOTE: THE NEXT DAY 3 OUTLOOK IS SCHEDULED BY 0730Z