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Mesoscale Discussion 556
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MD 556 graphic

   Mesoscale Discussion 0556
   NWS Storm Prediction Center Norman OK
   1121 PM CDT Sat Apr 27 2024

   Areas affected...TX Big Country into the Edwards Plateau

   Concerning...Severe Thunderstorm Watch 153...

   Valid 280421Z - 280615Z

   The severe weather threat for Severe Thunderstorm Watch 153

   SUMMARY...Broken squall line will advance east with an attendant
   risk for wind/hail.

   DISCUSSION...Latest satellite imagery clearly depicts large-scale
   ascent spreading across the southern high Plains late this evening.
   Robust, deep convection has evolved along the dryline south of I-20
   into the Edwards Plateau. A broken squall line, with embedded
   supercells, will propagate east into a region characterized by
   MLCAPE on the order of 3000 J/kg, and deep-layer shear more than
   strong enough to maintain organized updrafts. Latest radar data
   suggests large hail is likely with the strongest updrafts, and
   strong winds can be expected, especially with bowing segments. This
   activity will progress steadily east across the remainder of the
   watch into the pre-dawn hours.

   ..Darrow.. 04/28/2024

   ...Please see for graphic product...


   LAT...LON   29780250 32700149 32689943 29790052 29780250 

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