851 

ACUS11 KWNS 060219

SWOMCD

SPC MCD 060218 

WIZ000-IAZ000-MNZ000-060345-



Mesoscale Discussion 0994

NWS Storm Prediction Center Norman OK

0918 PM CDT Fri Jun 05 2026



Areas affected...Parts of southern/eastern WI and adjacent parts of

southeast MN/northeast IA



Concerning...Severe Thunderstorm Watch 274...



Valid 060218Z - 060345Z



The severe weather threat for Severe Thunderstorm Watch 274

continues.



SUMMARY...An isolated severe threat may continue into late evening,

before an eventual weakening trend.



DISCUSSION...A large storm cluster is moving southeastward across

central WI this evening. While the environment remains somewhat

favorable, with MLCAPE of greater than 1500 J/kg and 30-40 kt of

effective shear, much of the convection has been undercut by

outflow. Small line segments to the east of La Crosse and south of

Green Bay have taken on a more favorable north-south orientation,

and may pose a localized damaging-wind threat for as long as they

keep pace with the outflow. Additionally, a small supercell has

developed ahead of the storm cluster, to the southwest of Oshkosh.

With 0-1 km SRH of 100-200 m2/s2 (per objective mesoanalysis and the

KMKE VWP), this cell may pose some tornado potential for as long as

it persists.



With the onset of nocturnal cooling/stabilization, a general

weakening trend is expected with time later this evening, and

additional watch issuance is considered unlikely.



..Dean/Gleason.. 06/06/2026



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



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



LAT...LON   44529194 44079095 43968966 44118879 44398832 44658815

            44778793 44708753 43588752 43268776 42958854 42939062

            43299168 43899225 44529194 



MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH

MOST PROBABLE PEAK WIND GUST...55-70 MPH

MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN