Storm Prediction Center Mesoscale Discussion 1692

   Mesoscale Discussion 1692
   NWS Storm Prediction Center Norman OK
   0133 PM CDT Tue Jul 21 2026

   Areas affected...portions of West Virginia

   Concerning...Severe Thunderstorm Watch 506...

   Valid 211833Z - 211930Z

   The severe weather threat for Severe Thunderstorm Watch 506
   continues.

   SUMMARY...A locally greater risk for all severe hazards is likely to
   accompany two discrete/semi-discrete supercells currently located
   across portions of West Virginia over the next hour or so.

   DISCUSSION...Radar imagery from KRLX depicts a semi-discrete
   supercell entering Lewis County, West Virginia, with a separate,
   discrete supercell noted near the Ohio River in far western West
   Virginia.  Uncertainty remains as to how long these storms will be
   relatively discrete and if they will maintain their intensity as
   available buoyancy modestly decreases with eastward extent. However,
   given that these cells remain relatively discrete within a favorable
   thermodynamic/kinematic environment (40+ kts of effective shear and
   2000-2500 J/kg MLCAPE indicated by latest mesoanalysis and 100-125
   m2/s2 0-1 km SRH sampled by the RLX VWP), a locally greater severe
   risk is likely to exist for at least another hour in association
   with these supercells.

   ..Chalmers.. 07/21/2026

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

   ATTN...WFO...LWX...RNK...RLX...

   LAT...LON   38588234 38838191 38858183 39088077 39098028 39057989
               38997959 38907945 38807927 38717922 38537922 38447933
               38367971 38228025 38018109 37928145 37988182 38088215
               38258241 38438242 38588234 

   MOST PROBABLE PEAK TORNADO INTENSITY...85-110 MPH
   MOST PROBABLE PEAK WIND GUST...55-70 MPH
   MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN