Mesoscale Discussion 0498
   NWS Storm Prediction Center Norman OK
   1112 PM CDT Tue Apr 28 2020

   Areas affected...eastern Arkansas through southeast
   Missouri...western Kentucky...western Tennessee and northwest
   Mississippi

   Concerning...Severe Thunderstorm Watch 153...

   Valid 290412Z - 290515Z

   The severe weather threat for Severe Thunderstorm Watch 153
   continues.

   SUMMARY...Threat for mainly damaging wind will persist next couple
   hours as storms move through eastern AR to far western TN and
   western KY. Storms should begin a weakening trend east of the MS
   River, and a downstream WW is not anticipated. However, depending on
   convective trebds, the WW might need to be extended another row of
   counties from northwest MS through west TN and western KY.

   DISCUSSION...Extensive squall line with embedded bowing structures
   and meso-vortices extends from southeast MO through eastern AR
   moving east at 40-45 kt. The line should remain capable of producing
   damaging wind during the next couple of hours. However, a
   significant decrease in instability exists east of the MS River.
   Southeasterly trajectories from CP high pressure over the eastern
   U.S. has resulted in dewpoints remaining in the 50s F and MUCAPE
   below 500 J/kg. The increasingly marginal thermodynamic environment
   should result in a weakening trend after 05Z.

   ..Dial.. 04/29/2020

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

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

   LAT...LON   33919329 34189231 35129123 35759033 36648974 37668892
               37518806 35868862 34508976 33269217 33919329