Thunderstorms began to develop across south central Minnesota during the afternoon of Sunday, May 19th.  These storms started to accelerate northward near Owatonna, southeast to Blooming Prairie where the first report of damage was reported northwest of the town. As these storms started to accelerate to the north-northeast, several bow-echo type thunderstorm structures moved across east central Minnesota, and into west central Wisconsin during the early evening. Reports of 60 mph winds, trees blown down, damaged barns and power outages occurred from two lines of storms.

Thunderstorm Wind in PIERCE, WISCONSIN
From 19-MAY-13 16:20:00 to 19-MAY-13 16:20:00 (CST-6)
Location: BELDENVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A few trees were blown down north of Ellsworth, Wisconsin.

Thunderstorm Wind in ST. CROIX, WISCONSIN
From 19-MAY-13 16:40:00 to 19-MAY-13 16:42:00 (CST-6)
Location: BALDWIN
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two barns were damaged, shingles were blown off four houses, along with several small trees uprooted between Baldwin and Hammond, Wisconsin.

Thunderstorm Wind in DUNN, WISCONSIN
From 19-MAY-13 16:14:00 to 19-MAY-13 16:14:00 (CST-6)
Location: EAU GALLE
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A private weather station measured a wind gust of 58 mph.

Thunderstorm Wind in EAU CLAIRE, WISCONSIN
From 19-MAY-13 17:55:00 to 19-MAY-13 17:55:00 (CST-6)
Location: FALL CREEK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large tree branches were blown down near Fall Creek, Wisconsin.

Thunderstorm Wind in POLK, WISCONSIN
From 19-MAY-13 17:00:00 to 19-MAY-13 17:02:00 (CST-6)
Location: CLEAR LAKE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A large tree fell in Clear Lake.

Thunderstorm Wind in POLK, WISCONSIN
From 19-MAY-13 17:05:00 to 19-MAY-13 17:07:00 (CST-6)
Location: AMERY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees were uprooted around Amery, Wisconsin.

Thunderstorm Wind in POLK, WISCONSIN
From 19-MAY-13 17:08:00 to 19-MAY-13 17:10:00 (CST-6)
Location: CLAYTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees were blown down around Clayton, Wisconsin.

Thunderstorm Wind in ST. CROIX, WISCONSIN
From 19-MAY-13 16:55:00 to 19-MAY-13 16:57:00 (CST-6)
Location: NEW RICHMOND ARPT
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several power lines were blown down between New Richmond and Deer Park along Highway 64.

Thunderstorm Wind in CHIPPEWA, WISCONSIN
From 19-MAY-13 18:05:00 to 19-MAY-13 18:08:00 (CST-6)
Location: BATEMAN
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

There was a swath of trees uprooted from County Hwy K to the Village of Cadott.

Thunderstorm Wind in CHIPPEWA, WISCONSIN
From 19-MAY-13 18:03:00 to 19-MAY-13 18:03:00 (CST-6)
Location: BATEMAN
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A large tree fell on a home and caused significant damage to the roof and electronic gear on the upper floor.