Storm Prediction Center Mesoscale Discussion 583

   Mesoscale Discussion 0583
   NWS Storm Prediction Center Norman OK
   1133 PM CDT Sun Apr 27 2025

   Areas affected...Central Plains

   Concerning...Tornado Watch 178...

   Valid 280433Z - 280600Z

   The severe weather threat for Tornado Watch 178 continues.

   SUMMARY...Severe threat continues across northern Nebraska into
   southern South Dakota. WW178 will likely need to be extended beyond
   05z.

   DISCUSSION...Intense LLJ currently extends across western KS into
   south-central SD. This feature will gradually translate east,
   focusing into eastern SD by 08z. Current radar trends suggest an MCS
   is maturing along the SD/NE border, and this complex should
   propagate downstream along the nose of the LLJ. Long-lived supercell
   -- tornadic at times -- is tracking across northeast Cherry County
   NE within a favorable warm advection zone, and very strong 0-3km
   SRH. Some tornado threat continues with this supercell, and any
   other discrete updrafts, though a gradual evolution into a larger
   complex is expected. Severe threat will continue well past 05z and
   ww178 will likely be extended to account for this scenario.

   ..Darrow.. 04/28/2025

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

   ATTN...WFO...FSD...ABR...LBF...UNR...

   LAT...LON   43110198 44229910 42989833 42010160 43110198 

   MOST PROBABLE PEAK TORNADO INTENSITY...100-130 MPH
   MOST PROBABLE PEAK WIND GUST...65-80 MPH
   MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN