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Storm Prediction Center Mesoscale Discussion 864

Mesoscale Discussion 864
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   Mesoscale Discussion 0864
   NWS Storm Prediction Center Norman OK
   0129 AM CDT Tue May 21 2024

   Areas affected...southwestern Nebraska into northwestern Kansas

   Concerning...Tornado Watch 273...

   Valid 210629Z - 210730Z

   The severe weather threat for Tornado Watch 273 continues.

   SUMMARY...A cluster of intense storms continues moving eastward
   across southwestern Nebraska and adjacent northwestern Kansas. 
   All-hazards severe risk is evident.

   DISCUSSION...A well-organized, broadly rotating storm is currently
   observed crossing the Hayes/Hitchcock County vicinity in Nebraska,
   with trailing storms extending southwestward to Cheyenne County
   Kansas.  The storms are ongoing just north of the conglomerate
   surface front/outflow lying west-southwest to east-northeast across
   northwestern Kansas and into central and southeastern Nebraska.  As
   such, this region is on the northern gradient of surface-based
   instability, and thus capable of producing all-hazards severe
   weather -- given favorably strong/sheared background flow.  This
   convection should maintain intensity as it shifts eastward toward --
   and eventually into -- WW 274, aided by the observed 60-kt low-level

   ..Goss.. 05/21/2024

   ...Please see for graphic product...


   LAT...LON   39610212 39900210 40190168 40390153 40600017 39910002
               39700047 39610212 

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