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Mesoscale Discussion 535
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   Mesoscale Discussion 0535
   NWS Storm Prediction Center Norman OK
   0727 PM CDT Fri Apr 26 2024

   Areas affected...Central/Southern IA/northern MO

   Concerning...Tornado Watch 142...

   Valid 270027Z - 270200Z

   The severe weather threat for Tornado Watch 142 continues.

   SUMMARY...Supercells will propagate into central/south-central IA
   this evening. Tornado risk continues for the next few hours. A watch
   extension may be warranted.

   DISCUSSION...Multiple long-lived supercells, some producing
   tornadoes, have spread into the northeastern part of ww142.
   Immediately downstream of this activity, boundary layer has
   recovered a bit into central IA, per 58F Td now observed at KDSM.
   Given the progressive short-wave trough aiding this convection,
   there will be a propensity for organized updrafts continuing further
   downstream. While buoyancy is considerably weaker into central IA,
   there is some concern that supercells over southwest IA will spread
   east of the current watch before appreciably weakening. Tornado
   watch may need to be extended east for a few counties to account for
   this risk extending beyond watch expiration.

   ..Darrow.. 04/27/2024

   ...Please see for graphic product...


   LAT...LON   42279529 42629460 40869231 40289414 40559492 41439484

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