Mesoscale Discussion 0410
   NWS Storm Prediction Center Norman OK
   0540 PM CDT Sun Apr 19 2020

   Areas affected...central/southern Louisiana and southwest
   Mississippi

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

   Valid 192240Z - 200045Z

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

   SUMMARY...The severe threat continues across the Lower Mississippi
   Valley. A squall line is becoming more well defined with damaging
   winds and tornadoes embedded within the line as the main threats.

   DISCUSSION...A squall line continues to move eastward across the
   Lower Mississippi Valley with a collocated mesolow. Strong
   deep-layer mostly southwesterly flow resulting in 50+ knots of
   effective bulk shear and MLCAPE of 2500+ J/kg per are developing and
   maintaining deep, organized convection. The line is oriented mostly
   southwest-northeast, but it has shown evidence of segments becoming
   more north-south oriented, which would create more perpendicular
   flow and increase the damaging wind and tornado threat. Mesovortices
   have been observed in some of these more north-south segments with
   tornado potential highest near the mesolow in otherwise veered
   surface flow. These storms are likely to continue moving easterly
   through the evening with intensification possible as the low-level
   jet increases.

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

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

   ATTN...WFO...JAN...LIX...LCH...SHV...

   LAT...LON   30999354 31539268 32039222 32179178 32049086 31689058
               31009071 30559079 30089154 30249388 30999354