Mesoscale Discussion 0432
   NWS Storm Prediction Center Norman OK
   1132 PM CDT Tue Apr 21 2020

   Areas affected...Oklahoma

   Concerning...Severe Thunderstorm Watch 130...

   Valid 220432Z - 220600Z

   The severe weather threat for Severe Thunderstorm Watch 130
   continues.

   SUMMARY...Severe threat continues across much of ww130.

   DISCUSSION...Three long-lived supercells remain active across ww138
   within a broader region of convection. Very large hail has been
   noted with these supercells at times as they progress southeast
   along a corridor of focused low-level warm advection. In the short
   term, this activity should remain robust as updrafts are being fed
   from the south-southwest at 850mb where higher-PW air mass is
   advancing north across the southern Plains. With time, LLJ should
   refocus across northwest TX into southwest OK. Sustained warm
   advection will likely aid additional elevated convection, some of
   which could produce hail. While initial severe convection should
   spread into the southeastern parts of the ww over the next few
   hours, a convectively-active night may ultimately evolve given the
   moistening profiles amidst steep lapse rates/strongly sheared
   environment.

   ..Darrow.. 04/22/2020

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

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

   LAT...LON   36449993 35389637 33629636 34719994 36449993