Mesoscale Discussion 0255
   NWS Storm Prediction Center Norman OK
   0459 PM CDT Sat Mar 28 2020

   Areas affected...Eastern AR...Northern MS...Western
   TN/KY...Southeast MO/IL

   Concerning...Tornado Watch 68...70...

   Valid 282159Z - 282300Z

   The severe weather threat for Tornado Watch 68, 70 continues.

   SUMMARY...Tornado threat will shift east of WWs 68/69 over the next
   few hours. New tornado watch may be warranted soon.

   DISCUSSION...Latest NAM guidance suggests LLJ will strengthen across
   the western TN Valley this evening as 500mb speed max increases in
   excess of 100kt from AR into western KY over the next 03-06hr.
   Earlier trends suggesting a QLCS might be evolving across AR now
   favor a mix of discrete supercells and clusters. This may be in part
   to expected strengthening wind fields. Over the next few hours,
   ongoing corridor of supercells over eastern portions of ww68 should
   approach, then spread east of the watch. This will necessitate a new
   tornado watch soon.

   ..Darrow.. 03/28/2020

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

   ATTN...WFO...LMK...OHX...PAH...MEG...LZK...

   LAT...LON   34449138 38168854 37668662 34318895 34449138