Mesoscale Discussion 0489
   NWS Storm Prediction Center Norman OK
   0637 PM CDT Thu Apr 18 2024

   Areas affected...Portions of central Texas

   Concerning...Severe Thunderstorm Watch 128...

   Valid 182337Z - 190100Z

   The severe weather threat for Severe Thunderstorm Watch 128
   continues.

   SUMMARY...The risk of isolated large hail and severe gusts continues
   across portions of Severe Thunderstorm Watch 128.

   DISCUSSION...After several cell mergers and earlier hail reports (up
   to 2.25 inches in diameter) over parts of central TX, a locally
   upscale-grown cluster with two embedded supercells has developed.
   This evolution has been aided by a mostly straight
   hodograph/crosswise vorticity and very steep deep-layer lapse
   rates/strong outflow generation. Strong/deep buoyancy (2500-3000
   J/kg MLCAPE) ahead of the embedded supercells and aforementioned
   hodograph shape will continue to support large hail to near 2 inches
   in diameter. Additionally, the upscale growth could also favor an
   increasing severe-wind risk (around 60-70 mph) as the cluster tracks
   slowly south-southeastward this evening.

   ..Weinman.. 04/18/2024

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

   ATTN...WFO...FWD...EWX...SJT...

   LAT...LON   31239874 31589826 31639773 31449734 31159721 30629760
               30179829 30229874 30609911 30979907 31239874