Mesoscale Discussion 1811
   NWS Storm Prediction Center Norman OK
   1107 PM CST Tue Nov 24 2020

   Areas affected...western Arkansas through northeast Texas

   Concerning...Severe Thunderstorm Watch 514...

   Valid 250507Z - 250630Z

   The severe weather threat for Severe Thunderstorm Watch 514
   continues.

   SUMMARY...Threat for isolated damaging wind and a brief tornado or
   two will persist next couple hours, primarily from western Arkansas
   into northeast Texas. WW 514 can be locally extended a few counties
   east as needed, but a new WW issuance is not expected at this time.

   DISCUSSION...Line of storms with a few embedded bowing segments and
   mesovortices extends from near Ozark in western AR through northeast
   TX moving east at 30-35 kt. The northern portion of the line just
   east of Ozark is beginning to move outside of the northeast corner
   of the watch. However, the boundary layer farther east is fairly
   stable across central AR north of a warm front with temperatures and
   dewpoints in the low 50s F, suggesting these storms will probably
   begin a weakening trend. Farther south, the warm sector remains
   marginally unstable from southwest AR into northeast TX with
   500-1000 J/kg MLCAPE. The kinematic environment along with strong
   forcing for ascent associated with the progressive shortwave trough
   will remain favorable for this line of storms to persist through the
   remainder of WW 514 during the next few hours.

   ..Dial.. 11/25/2020

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

   ATTN...WFO...LZK...SHV...

   LAT...LON   32729556 33329485 33769452 34299417 34619398 34999381
               35229339 35059309 34139337 32679351 32379419 32399546
               32729556