Mesoscale Discussion 0439
   NWS Storm Prediction Center Norman OK
   1157 PM CDT Wed Apr 24 2019

   Areas affected...far east-central TX and northwest LA

   Concerning...Tornado Watch 100...

   Valid 250457Z - 250600Z

   The severe weather threat for Tornado Watch 100 continues.

   SUMMARY...Stronger circulations and a tornado with a recent TDS
   signature are indicative of the conditionality being met of an
   otherwise supportive mesoscale environment for low-level mesocyclone
   rotation.

   DISCUSSION...Radar imagery shows an intensifying band of
   quasi-discrete and embedded circulations near the LA/TX border. 
   KPOE VAD data for storm motions indicate around 250-300 m2/s2 0-1km
   SRH is present over west-central and northwest LA.  The moist
   environment coupled with sufficient buoyancy/shear in the low levels
   will continue to pose a threat for a tornado or two during the next
   few hours over northwest LA.  A squall line mesovortex tornado risk
   will likely concentrate in the far northwestern part of LA with the
   more notable supercell tornado risk farther south.

   ..Smith.. 04/25/2019

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

   ATTN...WFO...SHV...

   LAT...LON   31789394 32689387 32899284 32109271 31489310 31039446
               31789394