Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 105, NWS Milwaukee, WI

September 20, 2022Rock County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Sep 20, 2022, 3:49 PM CDT for Rock County, Wisconsin. It was in force for 26 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 20, 2022, 3:49 PM CDT (20:49 UTC)
Expired: Sep 20, 2022, 4:15 PM CDT
In force: 26 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Rock County, WI

The radar

The Milwaukee radar (KMKX), 54 km from the middle of the area, began a volume at 20:51 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, 8.8 hours before the alert went out and 166 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: 867 J/kg
Mixed-layer CIN: -331 J/kg
Mixed-layer LCL: 1524 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 167 m²/s²
0-3 km storm-relative helicity: 166 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 20, 3:44 PM CDT, 5 minutes earlier.

Area forecast discussion, Sep 20, 3:44 PM CDT, 5 minutes before

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Hazardous weather outlook, Sep 20, 3:45 PM CDT, 4 minutes before

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In the hours before

Local storm report, Sep 20, 2:52 PM CDT, 57 minutes before

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Local storm report, Sep 20, 2:59 PM CDT, 50 minutes before

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Local storm report, Sep 20, 3:00 PM CDT, 49 minutes before

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Local storm report, Sep 20, 3:20 PM CDT, 29 minutes before

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Local storm report, Sep 20, 3:28 PM CDT, 21 minutes before

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Special weather statement, Sep 20, 3:46 PM CDT, 3 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
Sep 20, 7:22 AM CDT	Special Weather Statement	MKX	Fond du Lac, Sheboygan	68 min
Sep 20, 7:39 AM CDT	Special Marine Warning	MKX		96 min
Sep 20, 11:51 AM CDT	Special Weather Statement	MKX	Sauk	39 min
Sep 20, 12:42 PM CDT	Special Weather Statement	MKX	Columbia, Dodge	48 min
Sep 20, 12:46 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dodge	29 min
Sep 20, 12:51 PM CDT	Small Craft Advisory	MKX		6 hr
Sep 20, 12:53 PM CDT	Beach Hazards Statement	MKX	Kenosha, Milwaukee, Ozaukee, Racine, Sheboygan	6 hr
Sep 20, 12:55 PM CDT	Special Weather Statement	MKX	Dane	50 min
Sep 20, 1:01 PM CDT	Severe Thunderstorm Warning Considerable damage threat	MKX	Dodge, Fond du Lac, Washington	33 min
Sep 20, 1:07 PM CDT	Special Weather Statement	MKX	Ozaukee	38 min
Sep 20, 1:14 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dane, Dodge, Jefferson	46 min
Sep 20, 1:33 PM CDT	Special Weather Statement	MKX	Dane	42 min
Sep 20, 1:49 PM CDT	Special Weather Statement	MKX	Dodge, Washington	41 min
Sep 20, 2:11 PM CDT	Special Weather Statement	MKX	Dane	49 min
Sep 20, 2:14 PM CDT	Special Weather Statement	MKX	Dane, Jefferson	46 min
Sep 20, 2:16 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Jefferson	44 min
Sep 20, 2:24 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Green, Iowa, Lafayette	34 min
Sep 20, 2:43 PM CDT	Special Weather Statement	MKX	Green	62 min
Sep 20, 2:49 PM CDT	Special Weather Statement	MKX	Jefferson, Milwaukee, Waukesha	56 min
Sep 20, 2:56 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Jefferson, Rock, Walworth	27 min
Sep 20, 3:46 PM CDT	Special Weather Statement	MKX	Rock	44 min
Sep 20, 4:14 PM CDT	Special Weather Statement	MKX	Walworth	31 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2022 Every severe thunderstorm warning in 2022

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.