A broken line of severe storms developed in an unstable air mass ahead of an advancing cold front. The storms produced large hail and damaging wind gusts, at times in excess of 70 mph.

Hail in OUTAGAMIE, WISCONSIN
From 21-AUG-13 19:05:00 to 21-AUG-13 19:05:00 (CST-6)
Location: COMBINED LOCKS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained weather spotter reported 1.00 inch diameter hail at the intersection of Highway 441 and East College Avenue.

Thunderstorm Wind in LINCOLN, WISCONSIN
From 21-AUG-13 16:48:00 to 21-AUG-13 16:48:00 (CST-6)
Location: SCHULTZ
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds downed trees 10 miles northwest of Merrill.

Thunderstorm Wind in MARINETTE, WISCONSIN
From 21-AUG-13 17:13:00 to 21-AUG-13 17:13:00 (CST-6)
Location: ATHELSTANE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A thunderstorm wind gust in excess of 60 mph knocked down numerous trees near Athelstane.

Thunderstorm Wind in MARINETTE, WISCONSIN
From 21-AUG-13 17:45:00 to 21-AUG-13 17:45:00 (CST-6)
Location: MC ALLISTER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported trees down in the town of Wagner.

Thunderstorm Wind in SHAWANO, WISCONSIN
From 21-AUG-13 18:20:00 to 21-AUG-13 18:20:00 (CST-6)
Location: THORNTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds downed several trees west of Shawano.

Thunderstorm Wind in DOOR, WISCONSIN
From 21-AUG-13 18:25:00 to 21-AUG-13 18:25:00 (CST-6)
Location: BAILEYS HARBOR
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Thunderstorm winds knocked down power lines and tree branches near Baileys Harbor.

Thunderstorm Wind in SHAWANO, WISCONSIN
From 21-AUG-13 18:25:00 to 21-AUG-13 18:25:00 (CST-6)
Location: SHAWANO
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds either uprooted or snapped many trees in Shawano.

Thunderstorm Wind in CALUMET, WISCONSIN
From 21-AUG-13 19:50:00 to 21-AUG-13 19:50:00 (CST-6)
Location: JERICHO
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds downed powerlines at the intersection of County Highway C and County Highway H.

Thunderstorm Wind in OCONTO, WISCONSIN
From 21-AUG-13 17:55:00 to 21-AUG-13 17:55:00 (CST-6)
Location: LENA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported an estimated 60 mph wind gust 3 miles NE of the town of Lena.

Thunderstorm Wind in SHAWANO, WISCONSIN
From 21-AUG-13 18:28:00 to 21-AUG-13 18:28:00 (CST-6)
Location: SHAWANO
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a thunderstorm wind gust estimated at 70 mph.

Funnel Cloud in SHAWANO, WISCONSIN
From 21-AUG-13 18:37:00 to 21-AUG-13 18:37:00 (CST-6)
Location: BONDUEL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A funnel cloud was spotted by local fire department personnel in Bonduel.

Hail in FOREST, WISCONSIN
From 21-AUG-13 16:35:00 to 21-AUG-13 16:35:00 (CST-6)
Location: ARGONNE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported 1.00 inch diameter hail near the town of Argonne. The report was received via local television station WSAW-TV.

Thunderstorm Wind in BROWN, WISCONSIN
From 21-AUG-13 19:02:00 to 21-AUG-13 19:02:00 (CST-6)
Location: ASHWAUBENON
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A thunderstorm wind gust of 62 mph was recorded at Austin Straubel Airport on the southwest side of Green Bay.

Thunderstorm Wind in KEWAUNEE, WISCONSIN
From 21-AUG-13 19:20:00 to 21-AUG-13 19:20:00 (CST-6)
Location: DUVALL
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds estimated at 65 mph, knocked down several trees and tree limbs.

Thunderstorm Wind in CALUMET, WISCONSIN
From 21-AUG-13 19:57:00 to 21-AUG-13 19:57:00 (CST-6)
Location: CHILTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds uprooted several 3 to 4 foot diameter trees.

Lightning in MARATHON, WISCONSIN
From 21-AUG-13 18:30:00 to 21-AUG-13 18:30:00 (CST-6)
Location: WAUSAU
Property damage: 99.00K
Crop damage: 0.00K
Reported by: Newspaper

A lightning strike sparked a fire which destroyed a duplex on Wausau's east side. No one was injured in the blaze.  The time of this event was estimated based on news reports and radar data.

Thunderstorm Wind in SHAWANO, WISCONSIN
From 21-AUG-13 18:10:00 to 21-AUG-13 18:15:00 (CST-6)
Location: MORGAN
Magnitude: 83.00 EG
Property damage: 75.00K
Reported by: NWS Storm Survey

A severe thunderstorm with estimated winds of 85 to 95 mph, caused damage to trees and two houses in Gresham. Both houses lost portions of the roof deck, in addition to several dozen trees on the property.

Thunderstorm Wind in MENOMINEE (C), WISCONSIN
From 21-AUG-13 18:25:00 to 21-AUG-13 18:25:00 (CST-6)
Location: KESHENA
Magnitude: 65.00 EG
Reported by: Trained Spotter

Thunderstorm winds downed trees in Keshena. One tree fell onto a car and killed a 39 year old woman.

Thunderstorm Wind in WAUPACA, WISCONSIN
From 21-AUG-13 18:27:00 to 21-AUG-13 18:27:00 (CST-6)
Location: CLINTONVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported trees down on 14th Street in Clintonville.  Time of event was estimated based on radar data.

Thunderstorm Wind in BROWN, WISCONSIN
From 21-AUG-13 19:00:00 to 21-AUG-13 19:00:00 (CST-6)
Location: CORMIER
Magnitude: 70.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Thunderstorm winds, estimated at 80 mph, took down several trees, numerous large limbs and blew off pieces of siding and shingles of several houses on the west side of Green Bay.

Hail in FLORENCE, WISCONSIN
From 21-AUG-13 16:10:00 to 21-AUG-13 16:10:00 (CST-6)
Location: TIPLER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported 1.00 inch diameter hail at Lost Lake or approximately 4 miles East-Southeast of the town of Tipler.