Storm Prediction Center Mesoscale Discussion 2143

   Mesoscale Discussion 2143
   NWS Storm Prediction Center Norman OK
   0701 PM CDT Wed Aug 26 2026

   Areas affected...portions of central and southern Arkansas

   Concerning...Severe Thunderstorm Watch 628...

   Valid 270001Z - 270130Z

   The severe weather threat for Severe Thunderstorm Watch 628
   continues.

   SUMMARY...A cluster of storms over central AR should continue to
   move south with occasional strong/severe gusts possible through this
   evening.

   DISCUSSION...Across WW628, radar imagery showed a cluster of strong
   to severe thunderstorms from southeastern OK into central AR. The
   strongest storms within the cluster are located across central AR,
   and this local clustering should continue this evening with several
   observed outflows likely to merge over the next hour or so. With
   plentiful buoyancy in place, maintenance of the ongoing storms or
   new development on the outflow appears likely. Modest deep-layer
   shear (15-25 kt) is supportive of a pulse multicell storm mode. This
   may allow for occasional strong to severe gusts given the favorable
   environment for strong downdrafts with high PWATs and consolidated
   outflow. Radar trends and short term model guidance show these
   storms continuing to propagate south/southeast into southern AR with
   a continued severe risk across central and southern portions of
   WW628 this evening.

   ..Lyons.. 08/27/2026

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

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

   LAT...LON   33329341 33589367 33759372 34109389 34429387 34919359
               35229288 35219220 35119183 34539148 33679154 33269220
               33139296 33329341 

   MOST PROBABLE PEAK WIND GUST...55-70 MPH
   MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN