Mesoscale Discussion 1483
   NWS Storm Prediction Center Norman OK
   0202 PM CDT Wed Aug 11 2021

   Areas affected...Portions of WI

   Concerning...Tornado Watch 424...

   Valid 111902Z - 112030Z

   The severe weather threat for Tornado Watch 424 continues.

   SUMMARY...The threat for all severe hazards, including tornadoes,
   will continue across much of southern/central WI this afternoon.

   DISCUSSION...Multiple supercells have formed this afternoon across
   WI along and ahead of a cold front. The environment remains very
   favorable for severe supercells, with MLCAPE of 2500-4000 J/kg
   present across this area, along with continued strong deep-layer
   shear owing to the upper trough and related 50-60+ kt mid-level jet
   present over the Upper Midwest. The greatest tornado potential in
   the short term should exist in a narrow southwest to northeast
   corridor across parts of southern/central WI, where around 100-150
   m2/s2 of 0-1 km SRH is present. Indeed, a supercell in Monroe County
   WI has recently acquired strong low-level rotation with a
   corresponding CC minimum. In addition to the tornado threat, both
   large hail and damaging winds will remain a possibility as well.
   This severe wind threat may increase across parts of east-central WI
   over the next couple of hours if storms continue to congeal and grow
   upscale into a cluster.

   ..Gleason.. 08/11/2021

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

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

   LAT...LON   43629157 43929113 44819009 45168870 44838719 43948764
               43088907 43129108 43629157