Storm Prediction Center Mesoscale Discussion 1515

   Mesoscale Discussion 1515
   NWS Storm Prediction Center Norman OK
   0544 PM CDT Sun Jun 29 2025

   Areas affected...Southern Wisconsin

   Concerning...Severe Thunderstorm Watch 477...

   Valid 292244Z - 300015Z

   The severe weather threat for Severe Thunderstorm Watch 477
   continues.

   SUMMARY...Thunderstorm development will remain possible along and
   south of an aggregate outflow boundary, but the threat for wind
   damage will become more marginal with time.

   DISCUSSION...Thunderstorms are ongoing along an aggregate outflow
   boundary that is moving slowly southward into southern WI.  Vertical
   shear is quite weak and little storm organization/persistence is
   expected, but the stronger storms could still produce isolated wind
   damage given precipitation loading and steep low-level lapse rates
   along and south of the outflow.  The limited severe threat appears
   to be covered by the current watch configuration, and no additional
   watches/extensions appear needed this evening.

   ..Thompson.. 06/29/2025

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

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

   LAT...LON   42768932 42679043 42899109 43259105 43468968 43838870
               44228804 44108781 43808802 43158875 42768932 

   MOST PROBABLE PEAK WIND GUST...55-70 MPH
   MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN