SPC AC 180800

   Day 3 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   0200 AM CST Thu Nov 18 2021

   Valid 201200Z - 211200Z

   ...NO SEVERE THUNDERSTORM AREAS FORECAST...

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

   ...Synopsis and Discussion...
   Surface high pressure initially centered over the East Coast should
   gradually shift into the western Atlantic on Saturday as an area of
   weak low pressure develops southeastward across south-central Canada
   near the international border. An upper trough is forecast to
   gradually amplify as it moves eastward across central Canada and
   into the northern/central Plains and Upper Midwest by the end of the
   period. Modest low-level moisture return should occur across parts
   of the southern Plains ahead of a cold front attendant to the weak
   surface low. Regardless, this moisture is expected to remain too
   shallow/limited to support thunderstorms. More substantial low-level
   moisture will likely remain confined to parts of the FL Peninsula
   through the day along/south of a remnant front. Large-scale ascent
   across this region will remain nebulous at best. Still, weak
   low-level convergence along sea breeze boundaries may be sufficient
   for isolated thunderstorms Saturday afternoon, mainly across parts
   of the eastern and southern FL Peninsula. Severe thunderstorms are
   not expected.

   ..Gleason.. 11/18/2021

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   NOTE: THE NEXT DAY 3 OUTLOOK IS SCHEDULED BY 0830Z