Mesoscale Discussion 0451
   NWS Storm Prediction Center Norman OK
   0908 PM CDT Wed Apr 22 2020

   Areas affected...ArkLaTex...southeast OK

   Concerning...Tornado Watch 136...

   Valid 230208Z - 230345Z

   The severe weather threat for Tornado Watch 136 continues.

   SUMMARY...Strong to severe storms are still ongoing across northern
   and western portions of WW136. All severe weather threats remain
   possible as storms move eastward.

   DISCUSSION...A cluster of storms across southeast Oklahoma and
   northeast Texas will continue to move to the east into an
   environment supportive of severe weather. Moist surface conditions
   with temps and dewpoints in the 60s and 70s are supporting MLCAPE of
   500-1500 J/kg. Deep layer shear remains favorable for organized
   convection including supercells and short line segments. Tornadoes
   remain possible due to 25-30 kt 0-1 km bulk shear. CAM guidance
   suggests some upscale growth with potential for damaging winds later
   this evening.

   New development has also started to take place along the surging
   cold front southwest of the main cluster across northeast Texas. A
   mixed mode of storms is likely in this corridor with all severe
   threats possible. Locally higher instability owing to a warmer and
   more moist boundary layer would be conditionally supportive of a
   greater severe threat should storms continue to mature and organize.

   ..Lyons/Grams.. 04/23/2020

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

   ATTN...WFO...LZK...SHV...TSA...FWD...

   LAT...LON   34249520 34189363 33899355 33109343 32729363 32519438
               32569525 32669598 33049626 33689564 34249520