A powerful squall line plowed through most of south-central and southeast Wisconsin during the late evening hours of June 11, 2001, resulting in widespread damage to trees, power lines, and power poles.   There were many reports of damage to residential homes, businesses, and motor vehicles, caused by falling trees/branches. Maximum wind gusts were in the 64 to 78 knot range (74 to 90 mph) in parts of Sheboygan, Dodge, and Washington counties, and 50 to 63 knots (58 to 73 mph) elsewhere.  In addition, three (3) tornadoes formed in a meso low-pressure on the left side of a pronounced down-burst located on the leading edge of the squall line.  One of the tornadoes, rated F0, briefly affected the area southwest of the village of Marquette (Green Lake Co.).  Later on, the same meso-low-pressure/down-burst couplet generated a F1 tornado that affected the area north and east of Fox Lake (Dodge Co.).  The last tornado (F1) spun up near Rubicon (Dodge Co.) and moved southeast into Washington County, giving the city of Waterford a glancing blow.  Refer to individual narratives on these 3 tornadoes under the tornado events for June 11th. Significant county reports follow.Marquette County:  A tree fell on and damaged a home in Packwaukee. Near Westfield, ten (10) calf pens were destroyed.Green Lake County:  A brief tornado (F0) damaged a home, barn, and several trees about 3 miles southwest of Marquette.  In addition, near Dalton, two (2) barns were severely damaged by down-burst winds.Fond du Lac County:  a boat in the Fond du Lac harbor sustained wind damage.Sheboygan County:  Hurricane-force winds over-turned a barn four (4) miles north of Beechwood.Dodge County:  A F1 tornado traveled from a point 4 miles north of Fox Lake to 4 miles east of Fox Lake.  A tornado spun up near Rubicon and then moved southeast into Washington County just north of State Highway 60.  Along its path in Dodge County, only F0 damage was observed.  Elsewhere, in the village of Neosho, a residential home was damaged by felled trees. In a rural area near Hustisford, the roof of a home was partially ripped off and several farm outbuildings were damaged.Washington County:  The tornado that spun up near Rubicon (Dodge Co.) intensified to a F1 rating as it moved southeast through the southwest part of Hartford, before dissipating southeast of the city.  This tornado inflicted wind or tree damage to more than 250 residential homes and business. Waukesha County: Down-burst winds pushed over a barn near the village of Lannon.  Most of the tree and power-line damage was noted in the Oconomowoc to Waukesha area, and in the North Prairie to Eagle area.Milwaukee County: tree/power-line damage across much of county.  Several cars sustained damaged from felled trees.  Mitchell Field had a measured maximum wind gust of 60 knots (69 mph).  Lightning struck a Wauwatosa home, resulting in a roof/attic fire.As the squall line moved through south-central and southeast Wisconsin, heavy rains reduced visibilities to 100-200 feet at some locations.  Total rainfall for the event was impressive, and exceeded 2 inches in some spots. West Allis (Milwaukee Co.) registered 2.70 inches, Watertown (Jefferson Co.) and Janesville (Rock Co.) measured 2.64 inches, Madison's Truax Field came in with 1.94 inches, and Milwaukee Mitchell Field recorded 1.75 inches. Most small streams reached near-bankfull stages, and the Fox River at New Munster, in western Kenosha County, eventually exceeded its 10 foot flood stage by 2.25 feet early at 0000CST on June 14, 2001.The squall line was the tail extension of an intense bow-echo that struck the east-central Wisconsin counties of Waushara, Winnebago, Calumet, and Manitowoc with hurricane-force, down-burst winds.  Twenty-four hours earlier, the bow-echo/squall line was a cluster of thunderstorms over eastern Montana.  Synpotically, a warm front extended from central Minnesota to southwest Wisconsin to just south of Chicago.   Aloft, a 500mb short-wave trough moved east across North Dakota and then moved southeast across Minnesota and Wisconsin.  Strong warm-air advection between 850 and 700mb fueled the thunderstorm complex.

Thunderstorm Wind in SHEBOYGAN, WISCONSIN
From 11-JUN-01 20:35:00 to 11-JUN-01 20:58:00 (CST)
Location: ELKHART LAKE
Magnitude: 70 E
Property damage: 25K
Reported by: LAW ENFORCEMENT

Tornado in DODGE, WISCONSIN
From 11-JUN-01 20:13:00 to 11-JUN-01 20:25:00 (CST)
Location: FOX LAKE
Tornado F-scale: F1
Property damage: 700K
Reported by: LAW ENFORCEMENT

A tornado spun up 4 miles north of Fox Lake in northwest Dodge County, and moved southeast through the grounds of the Fox Lake State Correctional Institute, before dissipating 4 miles east of Fox Lake. At the Correctional Institute, the tornado bent several fence sections, cut off power, burst two water mains, and smashed windows in the recreation hall.  Security guards reported a "lifting" force and "popping ears" as the tornado passed overhead.  Northeast and east of Fox Lake, the tornado destroyed 2 barns, severely damaged a third barn, and damaged 1 home, 3 silos, and 2 pole sheds.  Although the maximum path width was 75 yards, the average path width was closer to 40 yards.

Thunderstorm Wind in KENOSHA, WISCONSIN
From 11-JUN-01 21:45:00 to 11-JUN-01 22:00:00 (CST)
Location: TWIN LAKES
Magnitude: 52 E
Property damage: 15K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in WASHINGTON, WISCONSIN
From 11-JUN-01 21:16:00 to 11-JUN-01 21:20:00 (CST)
Location: RICHFIELD
Magnitude: 52 E
Property damage: 10K
Reported by: AMATEUR RADIO

Tornado in DODGE, WISCONSIN
From 11-JUN-01 20:45:00 to 11-JUN-01 20:49:00 (CST)
Location: RUBICON
Tornado F-scale: F0
Property damage: 25K
Reported by: EMERGENCY MANAGER

A weak (F0) tornado spun up 1 mile north/northwest of Rubicon in southeast Dodge County, and moved southeast before exiting the county at a point 2 miles east/southeast of Rubicon.  While in Dodge County, it pulled down or uprooted many trees.  This tornado then moved through Washington County, giving a glancing blow to the city of Hartford.  Associated winds were in the 52 to 61 knot range (60 to 70 mph).

Lightning in MILWAUKEE, WISCONSIN
From 11-JUN-01 20:24:00 to 11-JUN-01 20:24:00 (CST)
Location: WAUWATOSA
Property damage: 25K
Reported by: NEWSPAPER

Thunderstorm Wind in ROCK, WISCONSIN
From 11-JUN-01 21:25:00 to 11-JUN-01 21:50:00 (CST)
Location: COUNTYWIDE
Magnitude: 52 E
Property damage: 50K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in MILWAUKEE, WISCONSIN
From 11-JUN-01 21:10:00 to 11-JUN-01 21:30:00 (CST)
Location: COUNTYWIDE
Magnitude: 61 M
Property damage: 50K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in GREEN, WISCONSIN
From 11-JUN-01 21:34:00 to 11-JUN-01 21:34:00 (CST)
Location: ALBANY
Magnitude: 52 E
Property damage: 5K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in WALWORTH, WISCONSIN
From 11-JUN-01 21:30:00 to 11-JUN-01 21:30:00 (CST)
Location: EAST TROY
Magnitude: 55 E
Property damage: 25K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in WALWORTH, WISCONSIN
From 11-JUN-01 21:50:00 to 11-JUN-01 21:50:00 (CST)
Location: WALWORTH
Magnitude: 52 E
Property damage: 5K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in RACINE, WISCONSIN
From 11-JUN-01 21:45:00 to 11-JUN-01 22:00:00 (CST)
Location: BURLINGTON
Magnitude: 54 M
Property damage: 15K
Reported by: AMATEUR RADIO

Thunderstorm Wind in DODGE, WISCONSIN
From 11-JUN-01 20:25:00 to 11-JUN-01 20:45:00 (CST)
Location: BEAVER DAM
Magnitude: 70 E
Property damage: 200K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in OZAUKEE, WISCONSIN
From 11-JUN-01 21:00:00 to 11-JUN-01 21:15:00 (CST)
Location: COUNTYWIDE
Magnitude: 55 E
Property damage: 75K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in MARQUETTE, WISCONSIN
From 11-JUN-01 19:50:00 to 11-JUN-01 20:10:00 (CST)
Location: WESTFIELD
Magnitude: 55 M
Property damage: 15K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in GREEN LAKE, WISCONSIN
From 11-JUN-01 20:10:00 to 11-JUN-01 20:10:00 (CST)
Location: DALTON
Magnitude: 55 E
Property damage: 100K
Reported by: TRAINED SPOTTER

Tornado in WASHINGTON, WISCONSIN
From 11-JUN-01 20:49:00 to 11-JUN-01 20:56:00 (CST)
Location: HARTFORD
Tornado F-scale: F1
Property damage: 400K
Reported by: EMERGENCY MANAGER

This tornado entered Washington County 2.2 miles west/northwest of Hartford, after spinning up just north/northwest of Rubicon in Dodge County.  It traveled southeast and intensified to a F1 rating (winds about 78 to 87 knots, or 90 to 100 mph) as it cut across the southwest part of Hartford.  This tornado inflicted minor damage on 250 homes, major damage to 5 homes, and minor damage to 3 businesses.  Additional tornado-related costs, such as debris removal, protective measures, etc, amounted to $102,100.

Thunderstorm Wind in DANE, WISCONSIN
From 11-JUN-01 20:35:00 to 11-JUN-01 20:35:00 (CST)
Location: WAUNAKEE
Magnitude: 55 E
Property damage: 10K
Reported by: AMATEUR RADIO

Thunderstorm Wind in JEFFERSON, WISCONSIN
From 11-JUN-01 21:14:00 to 11-JUN-01 21:20:00 (CST)
Location: LAKE MILLS
Magnitude: 56 E
Property damage: 30K
Reported by: AMATEUR RADIO

Thunderstorm Wind in WAUKESHA, WISCONSIN
From 11-JUN-01 20:50:00 to 11-JUN-01 21:20:00 (CST)
Location: COUNTYWIDE
Magnitude: 52 M
Property damage: 75K
Reported by: LAW ENFORCEMENT

Tornado in GREEN LAKE, WISCONSIN
From 11-JUN-01 20:00:00 to 11-JUN-01 20:01:00 (CST)
Location: MARQUETTE
Tornado F-scale: F0
Property damage: 100K
Reported by: EMERGENCY MANAGER

A brief, weak, tornado damaged one home, one barn, and uprooted several trees.  This tornado was embedded in a solid line of thunderstorms, and apparently formed on the left side of a pronounced downburst on the leading edge of the line.  On the Milwaukee-Sullivan WSR-88D, a mesocyclone and tornado-vortex signature were observed.

Thunderstorm Wind in FOND DU LAC, WISCONSIN
From 11-JUN-01 20:10:00 to 11-JUN-01 20:45:00 (CST)
Location: COUNTYWIDE
Magnitude: 55 E
Property damage: 50K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in SAUK, WISCONSIN
From 11-JUN-01 20:09:00 to 11-JUN-01 20:30:00 (CST)
Location: BARABOO
Magnitude: 55 E
Property damage: 25K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in COLUMBIA, WISCONSIN
From 11-JUN-01 20:13:00 to 11-JUN-01 20:13:00 (CST)
Location: PARDEEVILLE
Magnitude: 61 E
Property damage: 25K
Reported by: LAW ENFORCEMENT