Storm Prediction Center Mesoscale Discussion 1422

   Mesoscale Discussion 1422
   NWS Storm Prediction Center Norman OK
   0609 PM CDT Mon Jun 23 2025

   Areas affected...portions of central and eastern Wisconsin

   Concerning...Severe Thunderstorm Watch 455...

   Valid 232309Z - 240045Z

   The severe weather threat for Severe Thunderstorm Watch 455
   continues.

   SUMMARY...A well-organized bowing cluster of severe storms will
   continue to pose a risk for damaging wind gusts this evening. An
   isolated gust to 75 mph is also possible.

   DISCUSSION...Across central WI, a cluster of thunderstorms has shown
   continued intensification/organization early this evening within
   WW455. North of KMSN, single site radar imagery shows an
   accelerating bowing cluster with recent reports of damage. In
   addition to increasingly strong radar/satellite features, area
   observations show outflow temperatures 20-25 F cooler behind line,
   indicative of a well-formed and deep cold pool. These convective
   trends within a very buoyant/moderately sheared environment strongly
   suggest a continued threat for wind damage downstream across central
   and eastern WI over the next couple of hours. Additionally, an
   isolated significant gust to 75 mph is possible given the increased
   forward speed and strong downdraft potential at the apex of the
   bowing cluster. Given the continued potential for damaging gusts,
   WW455 will be expanded locally ahead of the bow.

   ..Lyons.. 06/23/2025

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

   ATTN...WFO...GRB...MKX...ARX...

   LAT...LON   43269070 43339054 43599025 44188956 44398912 44398792
               44298746 43968769 43328778 42958781 42688774 42768992
               42919045 43269070 

   MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 95 MPH
   MOST PROBABLE PEAK WIND GUST...65-80 MPH
   MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN