Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 140, NWS Milwaukee, WI

September 22, 20254 counties in Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Sep 22, 2025, 8:25 AM CDT for 4 counties in Wisconsin. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 22, 2025, 8:25 AM CDT (13:25 UTC)
Expired: Sep 22, 2025, 9:15 AM CDT
In force: 50 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Columbia County, WI, Dodge County, WI, Fond du Lac County, WI, Green Lake County, WI

The radar

The Milwaukee radar (KMKX), 77 km from the middle of the area, began a volume at 13:27 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 1.4 hours before the alert went out and 257 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 304 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 1026 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: -32 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Milwaukee, WI wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 22, 4:10 AM CDT, 4 hours 15 minutes earlier.

Area forecast discussion, Sep 22, 4:10 AM CDT, 4 hours 15 minutes before

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Hazardous weather outlook, Sep 22, 8:09 AM CDT, 16 minutes before

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In the hours before

Special weather statement, Sep 22, 7:36 AM CDT, 49 minutes before

Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
736 AM CDT Mon Sep 22 2025

WIZ056-057-221315-
Columbia WI-Sauk WI-
736 AM CDT Mon Sep 22 2025

...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN COLUMBIA AND
NORTHERN SAUK COUNTIES THROUGH 815 AM CDT...

At 735 AM CDT, Doppler radar was tracking a strong thunderstorm over
Reedsburg, moving east at 40 mph.

HAZARD...Wind gusts up to 50 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Baraboo, Reedsburg, Wisconsin Dells, Lake Delton, West Baraboo,
Bluffview, North Freedom, Rock Springs, Loganville, Lime Ridge,
Devils Lake St Park, and Hill Point.

This includes the following highways...
 Interstate 90/94 between mile markers 88 and 99.
 U.S. Highway 12 between mile markers 213 and 223.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4364 8999 4364 8960 4329 8976 4344 9018
TIME...MOT...LOC 1235Z 289DEG 33KT 4356 9002

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

DDV

The office that day

Everything else NWS Milwaukee, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 22, 4:19 AM CDT	Dense Fog Advisory	MKX	Ozaukee, Sheboygan, Washington	6 hr
Sep 22, 4:51 AM CDT	Marine Dense Fog Advisory	MKX		9 hr
Sep 22, 7:05 AM CDT	Severe Thunderstorm Warning	MKX	Sauk	40 min
Sep 22, 7:36 AM CDT	Special Weather Statement	MKX	Sauk	39 min
Sep 22, 7:41 AM CDT	Severe Thunderstorm Warning	MKX	Columbia, Sauk	49 min
Sep 22, 7:56 AM CDT	Severe Thunderstorm Warning	MKX	Columbia, Marquette	49 min
Sep 22, 9:04 AM CDT	Special Weather Statement	MKX	Fond du Lac	56 min
Sep 22, 9:19 AM CDT	Special Weather Statement	MKX	Dodge, Washington	41 min
Sep 22, 10:28 AM CDT	Special Weather Statement	MKX	Ozaukee	47 min
Sep 22, 10:33 AM CDT	Special Weather Statement	MKX	Ozaukee	27 min
Sep 22, 2:14 PM CDT	Marine Dense Fog Advisory	MKX		17 hr
Sep 22, 5:59 PM CDT	Severe Thunderstorm Warning	MKX	Iowa	44 min
Sep 22, 6:34 PM CDT	Special Weather Statement	MKX	Lafayette	41 min
Sep 22, 6:47 PM CDT	Severe Thunderstorm Warning	MKX	Lafayette	26 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2025 Every severe thunderstorm warning in 2025

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.