Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 25, NWS Milwaukee, WI

April 13, 2026Sauk County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Apr 13, 2026, 3:09 PM CDT for Sauk County, Wisconsin. It was in force for 36 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: Apr 13, 2026, 3:09 PM CDT (20:09 UTC)
Expired: Apr 13, 2026, 3:45 PM CDT
In force: 36 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Sauk County, WI

The radar

The La Crosse radar (KARX), 109 km from the middle of the area, began a volume at 20:11 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

Minneapolis, MN (KMPX), launched 12:00Z, 8.2 hours before the alert went out and 332 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: 8 J/kg
Mixed-layer CIN: -259 J/kg
Mixed-layer LCL: 1506 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 124 m²/s²
0-3 km storm-relative helicity: 229 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 Apr 13, 2:49 PM CDT, 20 minutes earlier.

Area forecast discussion, Apr 13, 2:49 PM CDT, 20 minutes before

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Hazardous weather outlook, Apr 13, 12:37 PM CDT, 2 hours 32 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 6:33 AM CDT	Marine Dense Fog Advisory	MKX		3 days
Apr 13, 10:34 AM CDT	Flood Watch	MKX	Columbia, Dodge, Fond du Lac, Green Lake, Marquette, Ozaukee and 3 more	20 hr
Apr 13, 1:01 PM CDT	River Flood Watch	MKX	Columbia	15 hr
Apr 13, 3:30 PM CDT	Special Weather Statement	MKX	Marquette	30 min
Apr 13, 3:43 PM CDT	Special Weather Statement	MKX	Sauk	32 min
Apr 13, 4:10 PM CDT	Special Weather Statement	MKX	Columbia	35 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2026 Every severe thunderstorm warning in 2026

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.