Storm Prediction Center Mesoscale Discussion 1964

   Mesoscale Discussion 1964
   NWS Storm Prediction Center Norman OK
   0242 AM CDT Thu Aug 13 2026

   Areas affected...parts of east central Nebraska through central Iowa

   Concerning...Severe Thunderstorm Watch 580...

   Valid 130742Z - 130945Z

   The severe weather threat for Severe Thunderstorm Watch 580
   continues.

   SUMMARY...Strongest gusts are likely to continue in at least a
   narrow swath across east central Nebraska, and the Missouri River
   vicinity between Omaha and Tekamah, into the I-80 corridor of
   western Iowa through 4-5 AM CDT.

   DISCUSSION...The most intense convection remains concentrated near a
   new MCV evolving from an initial supercell now approaching the
   Norfolk vicinity, with an intense westerly rear inflow jet in excess
   of 80 kt still being sampled, at least in mid-levels in recent radar
   imagery.  Based on its current storm motion, it still appears on
   track to reach the Missouri River vicinity near/north of Omaha into
   the Tekamah vicinity by around 09Z.   Although latest objective
   analysis suggests that the magnitude of potentially unstable inflow
   could gradually begin to weaken along or just north of the I-80
   corridor into central Iowa, it still seems probable that activity
   could maintain severe strength into the Greater Des Moines vicinity
   by around 11-12Z.

   ..Kerr.. 08/13/2026

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

   ATTN...WFO...DMX...OAX...GID...

   LAT...LON   41759762 41849759 41959528 41379514 41299733 41309783
               41519749 41759762 

   MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH
   MOST PROBABLE PEAK WIND GUST...65-80 MPH
   MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN