Mesoscale Discussion 0497
   NWS Storm Prediction Center Norman OK
   1008 PM CDT Tue Apr 28 2020

   Areas affected...north central and northeast Texas through southeast
   Oklahoma and central through eastern Arkansas

   Concerning...Severe Thunderstorm Watch 153...154...

   Valid 290308Z - 290445Z

   The severe weather threat for Severe Thunderstorm Watch 153, 154
   continues.

   SUMMARY...Threat for damaging wind and large hail will persist this
   evening from north-central and northeast TX into southeast OK and
   central through eastern AR. Best best threat for a tornado or two
   appears to be from far northeast TX into southeast OK and southwest
   AR.

   DISCUSSION...Expansive squall line from northeast AR into southeast
   OK and north central TX is moving southeast at 30-35 kt. A few
   discrete cells continue developing ahead of the line from northeast
   TX into southeast OK and southwest AR along strengthening low-level
   jet. Low-level hodographs are sufficient for a threat of a couple of
   tornadoes in this region. Otherwise, the thermodynamic environment
   with 3000 J/kg MLCAPE and 40-45 kt effective shear are favorable for
   organized storm structures including bowing segments and a few
   supercells. Storms have tended to remain mostly discrete across
   north-central TX where supercell structures posing a threat for very
   large hail is greatest.

   ..Dial.. 04/29/2020

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

   ATTN...WFO...MEG...LZK...SHV...TSA...FWD...OUN...

   LAT...LON   33879732 34609391 34909318 35589235 36309089 35849055
               34549214 33709378 32499748 32779887 33879732