Storm Prediction Center Mesoscale Discussion 580

   Mesoscale Discussion 0580
   NWS Storm Prediction Center Norman OK
   0644 PM CDT Sun Apr 27 2025

   Areas affected...Portions of western Nebraska

   Concerning...Tornado Watch 178...

   Valid 272344Z - 280115Z

   The severe weather threat for Tornado Watch 178 continues.

   SUMMARY...Supercell tornado threat is expected to increase over the
   next hour.

   DISCUSSION...Recent radar data from LNX has shown splitting
   supercell structures and related mergers over portions of western
   NE, with a recent intensification of a right-moving supercell. As
   this storm and other nearby developing storms continue
   east-northeastward, a moist boundary layer (dewpoints in the lower
   60s) and increasing clockwise-curved hodographs (effective SRH
   increasing to around 400 m2/s2) will favor an increasing supercell
   tornado risk. Given, the ample streamwise vorticity and rich
   low-level moisture, a strong tornado cannot be ruled out.

   ..Weinman.. 04/27/2025

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

   ATTN...WFO...LBF...UNR...

   LAT...LON   41540202 42050220 42480265 42770270 42960242 43060212
               43040173 42830127 42390090 41790095 41470122 41390177
               41540202 

   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