SPC AC 290517

   Day 1 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   1117 PM CST Fri Dec 28 2018

   Valid 291200Z - 301200Z

   ...NO SEVERE THUNDERSTORM AREAS FORECAST...

   ...SUMMARY...
   Severe weather is unlikely across the nation on Saturday.

   ...Synopsis and Discussion...
   High pressure will exist across the bulk of the CONUS on Saturday
   with the surface ridge along a line from the Great Basin to the Ohio
   Valley. This will maintain relatively cool and stable conditions for
   most areas, along with offshore surface winds across much of the
   Gulf Coast and Mid Atlantic.

   In the upper levels, a low will sink southward out of AZ and NM into
   northern Mexico, with a broad zone of strong southwesterly flow
   aloft from the southern Plains to the East Coast. Little in the way
   of large scale lift/height falls will exist across the southern
   quarter of the CONUS due to an upper high over the Bahamas. 

   While surface based instability up to 500 J/kg will exist offshore
   the northern Gulf Coast and over parts of FL, any lift will likely
   be relegated to weak warm advection, resulting in elevated showers
   and a few thunderstorms primarily from southern LA, MS, and AL
   during the day and possibly into GA overnight. Weak lift along with
   poor lapse rates and instability will preclude any threat of severe
   weather on Saturday.

   ..Jewell/Squitieri.. 12/29/2018

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