SPC AC 171729

   Day 2 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   1129 AM CST Wed Nov 17 2021

   Valid 181200Z - 191200Z

   ...NO SEVERE THUNDERSTORM AREAS FORECAST...

   ...SUMMARY...
   Severe thunderstorms are not forecast across the contiguous United
   States on Thursday.

   ...Discussion...
   An upper trough crossing the Great Lakes/Upper Midwest/Southern
   Plains Thursday morning will continue its eastward advance, reaching
   the Northeast/Mid-Atlantic region overnight.  In its wake,
   westerly/zonal flow will expand across much of the country.

   At the surface, a cold front associated with the upper system should
   extend from the Lower Great Lakes region southwestward to the lower
   Mississippi Valley area initially.  The front will then progress
   steadily eastward, clearing the entirety of the U.S. with the
   exception of central/southern Florida by the end of the period.

   As the front advances, very weak pre-frontal instability will
   promote areas of showers, and locally some thunderstorm activity as
   well.  A few thunderstorms will be possible during the first half of
   the period across portions of the lower Mississippi Valley/central
   Gulf Coast area and into deep south Texas, and also increasingly
   across the eastern Carolinas area and parts of Florida later on as
   the front approaches.  In all areas, severe weather is not expected.

   ..Goss.. 11/17/2021

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   NOTE: THE NEXT DAY 2 OUTLOOK IS SCHEDULED BY 0700Z