Mesoscale Discussion 0460
   NWS Storm Prediction Center Norman OK
   0122 PM CDT Thu Apr 23 2020

   Areas affected...eastern South Carolina

   Concerning...Severe potential...Watch possible 

   Valid 231822Z - 231945Z

   Probability of Watch Issuance...40 percent

   SUMMARY...Some threat for isolated tornadoes might evolve this
   afternoon into the early evening across eastern South Carolina.
   Trends will continue to be monitored for a possible WW.

   DISCUSSION...Early this afternoon a broad corridor of mostly
   stratiform rain is spreading northeast through eastern South
   Carolina along evolving warm conveyor belt. A few small low-topped
   storms have developed within this area of rain, and some of this
   activity has exhibited rotation. Richer low-level moisture has
   advected inland with dewpoints generally in the low 60s F. However,
   the widspread rain and clouds will continue to limit instability
   with MUCAPE likely to remain near or below 500 J/kg. Nevertheless,
   the low-level jet will shift northeast through this region,
   resulting in large 0-1 km hodographs (300-500 m2/s2) storm relative
   helicity. Low-topped mini supercells will remain possible in this
   environment this afternoon. Given the limiting factor imposed by the
   marginal thermodynamic environment, it remains uncertain whether the
   severe threat will become sufficient for a WW, but trends will
   continue to be monitored.

   ..Dial/Hart.. 04/23/2020

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

   ATTN...WFO...ILM...CHS...CAE...

   LAT...LON   33167927 32388045 31798115 32648179 33568076 33817933
               33167927