Storm Prediction Center Mesoscale Discussion 407

   Mesoscale Discussion 0407
   NWS Storm Prediction Center Norman OK
   0546 PM CDT Mon Apr 13 2026

   Areas affected...Portions of Coulee region into central Wisconsin

   Concerning...Tornado Watch 103...

   Valid 132246Z - 140015Z

   The severe weather threat for Tornado Watch 103 continues.

   SUMMARY...A favorable corridor for tornadoes will exist along the
   warm front over the next 2-3 hours. As additional storms form this
   evening, storm interference may eventually modulate the tornado
   threat. Large to very-large hail is also possible.

   DISCUSSION...A favorable corridor for tornadoes exists along the
   warm front from west-central Wisconsin into central Wisconsin. Here,
   low-level shear will be maximized and will likely increase early
   this evening as 850 mb winds intensify. The strongest storm is
   currently along the Goodhue/Wabasha County line. This storm poses
   the greatest threat for large/very-large hail and tornadoes in the
   near term. The main question will be whether a storm can become
   dominant and move along the warm front. There will likely be a
   window during the next 2-3 hours where this is possible. Beyond that
   time, increasing low-level warm advection will probably promote
   additional storms and storm interactions will make the tornado risk
   less clear.

   ..Wendt.. 04/13/2026

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

   ATTN...WFO...GRB...ARX...MPX...

   LAT...LON   44379275 44669244 44819121 44739007 44528979 44178996
               44079133 44179245 44379275 

   MOST PROBABLE PEAK TORNADO INTENSITY...120-150 MPH
   MOST PROBABLE PEAK WIND GUST...55-70 MPH
   MOST PROBABLE PEAK HAIL SIZE...2.00-3.50 IN