Mesoscale Discussion 0505
   NWS Storm Prediction Center Norman OK
   0507 PM CDT Sun Apr 20 2025

   Areas affected...Central and Eastern Arkansas

   Concerning...Tornado Watch 154...

   Valid 202207Z - 202300Z

   The severe weather threat for Tornado Watch 154 continues.

   SUMMARY...Thunderstorms will continue east across Arkansas this
   afternoon and evening. The low-level environment will remain
   supportive of tornadoes. A new Tornado Watch will likely be needed
   across eastern Arkansas -- to the east of the existing watch --
   within the hour.

   DISCUSSION...A mixed-mode (linear segments and discrete cells) line
   of thunderstorms continues to move east across Arkansas this
   afternoon. The environment along and ahead of these storms is
   characterized by 100-mb mixed-layer CAPE around 1000 J/kg and
   effective-layer shear around 50-60 knots. Additionally, the Little
   Rock VAD depicts strong low-level curvature with 0-1 km SRH
   averaging around 180-190 m2/s2 over the last hour. Discrete
   thunderstorms moving from southwest Arkansas toward central Arkansas
   have shown increasing organization/mid-level rotation, with
   broadcast media reporting a tornado recently in Garland County. 

   This environment should evolve east across the state this evening,
   supporting a continued tornado threat east of the ongoing tornado
   watch. With Tornado Watch 154 scheduled to expire by 00 UTC / 7 PM
   CDT, a new tornado watch for portions of central and eastern
   Arkansas will likely be needed within the hour.

   ..Marsh/Guyer.. 04/20/2025

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

   ATTN...WFO...MEG...JAN...LZK...SGF...SHV...

   LAT...LON   36309300 36529184 36399031 35858986 34309047 34299051
               33299101 32979137 32899293 33049390 33949373 36309300