Mesoscale Discussion 0412
   NWS Storm Prediction Center Norman OK
   0637 PM CDT Sun Apr 19 2020

   Areas affected...far southern Mississippi into eastern Louisiana

   Concerning...Tornado Watch 121...122...123...

   Valid 192337Z - 200030Z

   The severe weather threat for Tornado Watch 121, 122, 123 continues.

   SUMMARY...A corridor for higher tornado potential exists across far
   southern Mississippi into adjacent areas of eastern Louisiana south
   of an outflow boundary. Storms moving along/south of this boundary
   will encounter stronger low-level shear.

   DISCUSSION...An outflow boundary has moved south from central
   Mississippi into southern Mississippi where winds have backed to
   southeasterly along and just south of this boundary. A few
   supercells developed across southwest Mississippi and eastern
   Louisiana in the last hour or so, but have now mostly congealed into
   a cluster due to upscale growth and the southward moving outflow
   boundary. However, the southern storm is still exhibiting supercell
   characteristics and has shown MESH values of 1+ inch although
   convective interference has weakened it somewhat. Surface winds near
   MCB and eastward have backed to the southeast indicating potentially
   higher low-level helicity, which could increase the tornado threat.
   There remains uncertainty due to the amount of potential convective
   interference and that the outflow boundary could continue sliding
   southward.

   ..Nauslar/Guyer.. 04/19/2020

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

   ATTN...WFO...MOB...JAN...LIX...

   LAT...LON   30759024 30889042 31329047 31449026 31538914 31498883
               31338867 31108858 30728875 30738900 30718983 30759024