ACUS11 KWNS 060219
SWOMCD
SPC MCD 060218=20
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 https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!8ydYUj1V1gvtNmsT_jCivXX6e7hBgp62pi_sdI2JxY2rgJnHDU5vUHzR6pu_HbkHG-OGjKAoQ= MXmqUCSzycM2o7Yie8$ 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=20

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


=3D =3D =3D
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