Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 28, NWS Milwaukee, WI

April 18, 20254 counties in Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Apr 18, 2025, 3:04 PM CDT for 4 counties in Wisconsin. It was in force for 41 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 18, 2025, 3:04 PM CDT (20:04 UTC)
Expired: Apr 18, 2025, 3:45 PM CDT
In force: 41 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Milwaukee County, WI, Racine County, WI, Walworth County, WI, Waukesha County, WI

The radar

The Milwaukee radar (KMKX), 35 km from the middle of the area, began a volume at 20:05 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, 8.1 hours before the alert went out and 238 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: 353 J/kg
Mixed-layer CIN: -451 J/kg
Mixed-layer LCL: 1059 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 416 m²/s²
0-3 km storm-relative helicity: 295 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 18, 10:41 AM CDT, 4 hours 23 minutes earlier.

Area forecast discussion, Apr 18, 10:41 AM CDT, 4 hours 23 minutes before

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Hazardous weather outlook, Apr 18, 3:00 PM CDT, 4 minutes before

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In the hours before

Local storm report, Apr 18, 1:15 PM CDT, 1 hour 49 minutes before

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Local storm report, Apr 18, 1:17 PM CDT, 1 hour 47 minutes before

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Local storm report, Apr 18, 2:03 PM CDT, 1 hour 1 minute before

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Local storm report, Apr 18, 2:34 PM CDT, 30 minutes before

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Special weather statement, Apr 18, 2:43 PM CDT, 21 minutes before

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Local storm report, Apr 18, 2:44 PM CDT, 20 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 18, 5:07 AM CDT	Severe Thunderstorm Warning	MKX	Iowa, Sauk	53 min
Apr 18, 5:35 AM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dane, Iowa, Sauk	55 min
Apr 18, 5:41 AM CDT	Severe Thunderstorm Warning Considerable damage threat	MKX	Iowa, Lafayette	49 min
Apr 18, 6:15 AM CDT	Severe Thunderstorm Warning Considerable damage threat	MKX	Columbia, Dane, Green, Iowa, Lafayette, Sauk	45 min
Apr 18, 6:45 AM CDT	Severe Thunderstorm Warning Considerable damage threat	MKX	Columbia, Dane, Dodge, Green, Jefferson, Rock	45 min
Apr 18, 7:06 AM CDT	Severe Thunderstorm Warning Destructive damage threat	MKX	Dane, Jefferson, Rock	39 min
Apr 18, 7:17 AM CDT	Special Marine Warning	MKX		88 min
Apr 18, 7:18 AM CDT	Severe Thunderstorm Warning Considerable damage threat	MKX	Dane, Dodge, Jefferson, Milwaukee, Ozaukee, Rock and 3 more	57 min
Apr 18, 7:27 AM CDT	Severe Thunderstorm Warning	MKX	Dane	32 min
Apr 18, 7:37 AM CDT	Severe Thunderstorm Warning Destructive damage threat	MKX	Waukesha	38 min
Apr 18, 8:10 AM CDT	Special Weather Statement	MKX	Walworth	35 min
Apr 18, 8:11 AM CDT	Severe Thunderstorm Warning	MKX	Dodge, Jefferson, Milwaukee, Ozaukee, Washington, Waukesha	25 min
Apr 18, 8:36 AM CDT	Special Weather Statement	MKX	Milwaukee, Racine, Waukesha	39 min
Apr 18, 8:38 AM CDT	Special Marine Warning	MKX		70 min
Apr 18, 8:40 AM CDT	Flash Flood Warning	MKX	Milwaukee, Ozaukee, Waukesha	110 min
Apr 18, 8:46 AM CDT	Severe Thunderstorm Warning	MKX	Milwaukee, Racine, Waukesha	29 min
Apr 18, 2:43 PM CDT	Special Weather Statement	MKX	Rock	32 min
Apr 18, 2:46 PM CDT	Severe Thunderstorm Warning	MKX	Jefferson, Rock, Walworth	29 min
Apr 18, 3:06 PM CDT	Special Marine Warning	MKX		90 min
Apr 18, 3:33 PM CDT	Special Marine Warning	MKX		16 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.