Mesoscale Discussion 1664
   NWS Storm Prediction Center Norman OK
   0547 PM CDT Tue Sep 01 2020

   Areas affected...Northwest MS...Western TN

   Concerning...Tornado Watch 481...

   Valid 012247Z - 020015Z

   The severe weather threat for Tornado Watch 481 continues.

   SUMMARY...Locally damaging winds, and perhaps a tornado or two,
   remain possible across ww481. New watch may be warranted downstream.

   DISCUSSION...Outflow from early-morning convection, that developed
   over the southern Plains, has progressed into the lower MS Valley
   where it continues to provide the focus for renewed thunderstorm
   activity. While convective outflow is generally rushing ahead of the
   main line, several pre-squall line supercells are noted from
   southeast AR into extreme northwest TN. Latest diagnostic data
   suggests an axis of relatively steep low-level lapse rates extend
   ahead of the line from northern LA-northwest MS-western TN.  This
   may continue to prove favorable for updraft intensity as convection
   spreads east. If storms maintain their intensity over the next hour
   or so a new watch may be warranted immediately downstream from
   northwest MS into western TN.

   ..Darrow.. 09/01/2020

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

   ATTN...WFO...PAH...MEG...JAN...LZK...

   LAT...LON   33599011 34898921 36718849 36489012 36139204 34819288
               34039315 33269134 33599011