Mesoscale Discussion 0539
   NWS Storm Prediction Center Norman OK
   0929 PM CDT Mon May 04 2020

   Areas affected...east-central Oklahoma...northwestern Arkansas

   Concerning...Tornado Watch 163...

   Valid 050229Z - 050330Z

   The severe weather threat for Tornado Watch 163 continues.

   SUMMARY...Severe/isolated tornado risk continues with a few stronger
   cells, and my persist for a short time beyond the scheduled
   expiration of WW 163.  Local extensions in time/space may be
   considered.

   DISCUSSION...Recent radar data over the past hour reveals a very
   gradual decrease in convective intensity and associated severe risk,
   in tandem with the onset of diurnal boundary-layer cooling.  A few
   stronger cells persist however, particularly a supercell storm
   crossing western Sequoyah County Oklahoma, which remains capable of
   producing hail in excess of 2" in diameter per MRMS MESH data.  

   At this time, it appears that local severe risk may persist beyond
   05/03Z, though a continuation of the overall, gradual decrease in
   convective intensity should continue.  Local extensions of the WW
   may be considered to extend beyond 03Z for a portion of east-central
   OK and adjacent western AR.

   ..Goss.. 05/05/2020

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

   ATTN...WFO...LZK...TSA...

   LAT...LON   35379575 36179412 36279339 36109322 35549313 35019340
               34939430 35139547 35379575