SPC AC 180044

   Day 1 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   0744 PM CDT Wed Mar 17 2021

   Valid 180100Z - 181200Z

   ...THERE IS A HIGH RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF
   ALABAMA...

   ...SUMMARY...
   The potential for significant tornadoes continues tonight. Much of
   the greatest risk is over Alabama.

   ...01z Update...

   LLJ is strengthening across the central Gulf States this evening
   ahead of a strong mid-level short-wave trough that is progressing
   into the lower MS Valley. Large-scale forcing appears to be
   contributing to an elongated MCS that is growing upscale from
   eastern MS into southeastern LA. While this MCS is gradually
   maturing, numerous embedded mesos are noted along this corridor and
   the strength of the wind fields continue to favor the potential for
   supercells. Of more concern are the discrete storms that continue
   ahead of the MCS, and the potential for new supercells.
   Strengthening wind fields favor tornadoes with this activity. The
   primary changes at 01z are to lower severe probabilities in the wake
   of the evolving MCS.

   ..Darrow.. 03/18/2021

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