Mesoscale Discussion 0431
   NWS Storm Prediction Center Norman OK
   0910 PM CDT Tue Apr 21 2020

   Areas affected...Western and Central Oklahoma

   Concerning...Severe Thunderstorm Watch 130...

   Valid 220210Z - 220345Z

   The severe weather threat for Severe Thunderstorm Watch 130
   continues.

   SUMMARY...Large to very large hail and strong winds will continue
   with several organized supercells along and north of the warm front
   through western and central Oklahoma. Some upscale growth and
   damaging wind potential may increase later this evening.

   DISCUSSION...A corridor of well organized supercells producing large
   to very large hail was located across central and western Oklahoma
   this evening. These storms are ongoing along and north of a
   northwest to southeast oriented warm front. South of this front, a
   nose of higher theta-E air is being advected northwestward with
   dewpoints in the 50s and low 60s F. The thermodynamic enviornment is
   supportive of a continued severe weather threat with 3 to 6 km lapse
   rates of 7 to 7.5 C/km and MLCAPE of 500-1500 J/kg. The 00z OUN
   sounding also showed favorable wind profiles for well organized
   convection with effective bulk shear of 60-70 kts. This will
   continue to support supercells capable of large and significant hail
   for the next several hours. Hi-res guidance indicates some potential
   for upscale growth after 03z with an attendant increase in damaging
   wind potential on any line or bowing segments that develop.

   ..Lyons/Grams.. 04/22/2020

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

   ATTN...WFO...TSA...FWD...OUN...

   LAT...LON   36439992 34739994 33649636 35389641 36459991 36439992