Mesoscale Discussion 0411
   NWS Storm Prediction Center Norman OK
   0552 PM CDT Sun Apr 19 2020

   Areas affected...Portions of Central/Southern Alabama

   Concerning...Tornado Watch 123...

   Valid 192252Z - 200015Z

   The severe weather threat for Tornado Watch 123 continues.

   SUMMARY...Tornado threat continues across the southern two-thirds of
   ww123.

   DISCUSSION...Early-day convection that spread across GA has forced a
   well-defined boundary south and a bit west arcing across ww123.
   Latest surface obs suggest this wind shift extends from Henry -
   Butler - Marengo Counties in AL, immediately ahead of a surging
   squall line. Over the last few hours an MCV has evolved along the
   northern edge of a pronounced squall line that is surging east in
   excess of 45kt. Thunderstorms have struggled to develop across the
   warm sector, possibly due to somewhat weak low-level convergence.
   While the air mass has warmed across southern MS into southern AL,
   the primary concern in the near-tern will be along the
   aforementioned boundary which should serve as the focus for upstream
   convection to propagate along. While the primary storm mode remains
   linear with clusters, strong shear continues to support supercells;
   although, the most likely region for supercells will be across the
   warm sector where storms have struggled to develop.

   ..Darrow.. 04/19/2020

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

   ATTN...WFO...TAE...BMX...MOB...JAN...

   LAT...LON   32688791 32148548 31538493 31138541 31358699 31908853
               32688791