Mesoscale Discussion 2053
   NWS Storm Prediction Center Norman OK
   0323 PM CDT Wed Sep 11 2024

   Areas affected...portions of southern and eastern Louisiana into
   southern Mississippi

   Concerning...Tornado Watch 667...

   Valid 112023Z - 112200Z

   The severe weather threat for Tornado Watch 667 continues.

   SUMMARY...The severe threat continues across Tornado Watch 667. A
   brief tornado or two cannot be ruled out over the next few hours.

   DISCUSSION...Multiple transient supercells, embedded within the
   broader rainbands associated with Hurricane Francine, have
   percolated in intensity and organization over the past few hours
   across southeast LA and adjacent areas offshore. However, a
   widespread and persistent rain-shield has limited diurnal heating,
   with surface temperatures barely exceeding the mid 70s F amid mid
   70s F dewpoints. The resultant thermodynamic profiles yields scant
   buoyancy inland, with MLCAPE limited to 500 J/kg (perhaps less in
   spots), which is likely tempering tornado potential. Nonetheless,
   HDC VAD profiler trends show hodographs increasing in size and
   curvature as vertical wind fields increase in intensity with the
   approach of Francine's center. As such, a couple of brief tornadoes
   cannot be ruled out where any longer-lived, sustained supercell
   structure can traverse a favorable overlapping buoyancy/shear
   parameter space.

   ..Squitieri.. 09/11/2024

   ...Please see www.spc.noaa.gov for graphic product...

   ATTN...WFO...LIX...LCH...

   LAT...LON   29119144 29559204 29919209 30189163 30359087 30478862
               30478846 30418846 30238859 29928872 29308895 28968928
               28908966 28909051 29119144