Alert archive / Wisconsin / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 402

June 11, 200110 counties in Wisconsin

The Storm Prediction Center issued this severe thunderstorm watch at Jun 11, 2001, 9:15 PM CDT for 10 counties in Wisconsin. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Jun 11, 2001, 9:15 PM CDT (02:15 UTC)
Expired: Jun 12, 2001, 12:00 AM CDT
In force: 3 hr
Issued by: the Storm Prediction Center

Counties Brown County, WI, Calumet County, WI, Kewaunee County, WI, Manitowoc County, WI, Milwaukee County, WI, Ozaukee County, WI, Sheboygan County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI

Warnings issued inside it

9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jun 11, 9:32 PM CDT	Severe Thunderstorm Warning	MKX	Ozaukee, Sheboygan, Washington	58 min
Jun 11, 9:33 PM CDT	Severe Thunderstorm Warning	GRB	Brown, Calumet, Outagamie	42 min
Jun 11, 9:33 PM CDT	Severe Thunderstorm Warning	MKX	Jefferson, Waukesha	57 min
Jun 11, 9:42 PM CDT	Severe Thunderstorm Warning	GRB	Manitowoc	63 min
Jun 11, 9:47 PM CDT	Tornado Warning	MKX	Dodge, Washington	28 min
Jun 11, 9:56 PM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Milwaukee, Racine, Walworth	64 min
Jun 11, 10:03 PM CDT	Tornado Warning	MKX	Milwaukee, Ozaukee, Washington, Waukesha	27 min
Jun 11, 10:20 PM CDT	Severe Thunderstorm Warning	GRB	Calumet	40 min
Jun 11, 10:35 PM CDT	Severe Thunderstorm Warning	GRB	Manitowoc	40 min

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 2.3 hours before the alert went out and 109 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: 2182 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 990 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 133 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 5.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 11, 7:00 PM CDT	Tornado Watch	SPC	Adams, Columbia, Crawford, Dane, Dodge, Fond du Lac and 17 more	5 hr
Jun 11, 8:00 PM CDT	Severe Thunderstorm Watch	SPC	Trempealeau	6 hr
Jun 11, 10:30 PM CDT	Severe Thunderstorm Watch	SPC	Kenosha, Racine, Walworth	5 hr

Nearby

Severe Thunderstorm Watches in Wisconsin, 2001 Every severe thunderstorm watch in 2001

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.