Mesoscale Discussion 1155
   NWS Storm Prediction Center Norman OK
   0308 AM CDT Thu Jun 20 2019

   Areas affected...Portions of far northeastern LA into central MS

   Concerning...Severe Thunderstorm Watch 405...406...

   Valid 200808Z - 200945Z

   The severe weather threat for Severe Thunderstorm Watch 405, 406
   continues.

   SUMMARY...Strong to damaging wind threat should increase in the next
   hour or two as storms approach Jackson, MS.

   DISCUSSION...A recent merger of two previously separate line
   segments has occurred across far northeastern MS. A corresponding
   increase in echo tops and reflectivity has also occurred per KDGX
   radar. West-southwesterly flow quickly strengthens to around 50-60
   kt at mid levels across central MS based on RAP forecast soundings
   and VWP estimates from KDGX. An outflow boundary from prior storms
   lies east/west across central MS, and the small bowing segment now
   crossing the MS River may move eastward along this boundary towards
   the Jackson, MS metro over the next hour or two. Strong to damaging
   winds could occur given the strong inbound velocities noted on KDGX
   radar, and a small southward expansion in area has been made to
   Severe Thunderstorm Watch 406 to account for this possibility.

   ..Gleason.. 06/20/2019

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

   ATTN...WFO...JAN...

   LAT...LON   32019159 32939081 32899003 32648972 31808967 31719067
               31749122 32019159