This event was considered a derecho due to the path length, and width as the storms moved from South Dakota, through southern Minnesota, across Wisconsin, and the western part of Michigan, or approximately 860 miles.
The morning of Saturday, July 20th, thunderstorms that developed across South Dakota, quickly moved eastward along a slowly moving cold front in far southern Minnesota. Thunderstorms developed into a line segment and bowed out, and caused damaging winds in a few areas of southern Minnesota. These storms quickly moved into Wisconsin by noon. There were several reports of measured winds by airport sensors, private weather stations, and the Minnesota Department of Transportation wind sensors.  Some of the measured wind gusts were between 50 and 55 mph, along with numerous blown down small tree limbs throughout the duration of the bow echo segment that weren't included in the storm damage report. The local emergency manager of Blue Earth County had 13 different reports of power lines down, and 28 reports of trees blown downed.
A few storms developed prior to the line segment over southern Minnesota which across parts of the Twin Cities metro area. A wind gust of 59 knots was measured at the Crystal airport along with a large tree that blew down near the airport.

Thunderstorm Wind in WATONWAN, MINNESOTA
From 20-JUL-19 08:49:00 to 20-JUL-19 08:49:00 (CST-6)
Location: ST JAMES
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Power was knocked out in the city of St. James due to blown down power lines.

Thunderstorm Wind in MARTIN, MINNESOTA
From 20-JUL-19 09:04:00 to 20-JUL-19 09:06:00 (CST-6)
Location: FAIRMONT ARPT
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in MARTIN, MINNESOTA
From 20-JUL-19 09:04:00 to 20-JUL-19 09:06:00 (CST-6)
Location: FAIRMONT
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Social Media

There were pictures of damage in the city of Fairmont. This included a large tree that fell down on a truck, and a few trees uprooted.

Thunderstorm Wind in FARIBAULT, MINNESOTA
From 20-JUL-19 09:17:00 to 20-JUL-19 09:17:00 (CST-6)
Location: WINNEBAGO
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a large tree limb blown down in the city of Winnebago.

Thunderstorm Wind in WASECA, MINNESOTA
From 20-JUL-19 09:45:00 to 20-JUL-19 09:45:00 (CST-6)
Location: WALDORF
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several large tree limbs were blown down around the city of Waldorf.

Thunderstorm Wind in BLUE EARTH, MINNESOTA
From 20-JUL-19 09:10:00 to 20-JUL-19 09:10:00 (CST-6)
Location: BUTTERNUT
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Minnesota Department of Transportation weather sensor reported a measured wind gust of 52 knots.

Thunderstorm Wind in BLUE EARTH, MINNESOTA
From 20-JUL-19 09:17:00 to 20-JUL-19 09:17:00 (CST-6)
Location: (MKT)MANKATO MUNI AR
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in WASECA, MINNESOTA
From 20-JUL-19 09:33:00 to 20-JUL-19 09:35:00 (CST-6)
Location: JANESVILLE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

There were multiple reports of downed trees in the city of Janesville.

Thunderstorm Wind in RICE, MINNESOTA
From 20-JUL-19 09:51:00 to 20-JUL-19 09:52:00 (CST-6)
Location: FARIBAULT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

There were numerous blown down large tree limbs on the southwest corner of County Road 45, and 250th street south of Faribault.

Thunderstorm Wind in GOODHUE, MINNESOTA
From 20-JUL-19 10:15:00 to 20-JUL-19 10:16:00 (CST-6)
Location: ZUMBROTA
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

There was a large tree that was uprooted in the city of Zumbrota.

Thunderstorm Wind in FREEBORN, MINNESOTA
From 20-JUL-19 10:01:00 to 20-JUL-19 10:01:00 (CST-6)
Location: HAYWARD
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter measured a wind gust of 52 knots.

Thunderstorm Wind in FREEBORN, MINNESOTA
From 20-JUL-19 09:55:00 to 20-JUL-19 10:05:00 (CST-6)
Location: ALBERT LEA
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

There was widespread tree damage, and some roof damage to commercial buildings around Albert Lea, and then eastward toward Hayward, and Glenville.

Thunderstorm Wind in WASECA, MINNESOTA
From 20-JUL-19 09:45:00 to 20-JUL-19 09:47:00 (CST-6)
Location: WASECA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

There were reports of multiple trees blown down around Waseca.

Thunderstorm Wind in FREEBORN, MINNESOTA
From 20-JUL-19 10:00:00 to 20-JUL-19 10:02:00 (CST-6)
Location: CLARKS GROVE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Several trees and large tree branches were blown down east of Clarks Grove.

Thunderstorm Wind in STEELE, MINNESOTA
From 20-JUL-19 09:55:00 to 20-JUL-19 09:55:00 (CST-6)
Location: OWATONNA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A tree was uprooted at the Owatonna country club.

Thunderstorm Wind in BLUE EARTH, MINNESOTA
From 20-JUL-19 09:15:00 to 20-JUL-19 09:15:00 (CST-6)
Location: MANKATO
Magnitude: 52.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Social Media

A large tree blew down and landed on a van.

Thunderstorm Wind in HENNEPIN, MINNESOTA
From 20-JUL-19 07:30:00 to 20-JUL-19 07:30:00 (CST-6)
Location: CRYSTAL ARPT
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A large tree was blown down near the airport.

Thunderstorm Wind in WASHINGTON, MINNESOTA
From 20-JUL-19 08:49:00 to 20-JUL-19 08:49:00 (CST-6)
Location: WOODBURY
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Wind gust measured by a home weather station. In addition, several large tree branches were blown down.

Thunderstorm Wind in STEELE, MINNESOTA
From 20-JUL-19 09:56:00 to 20-JUL-19 09:58:00 (CST-6)
Location: ELLENDALE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A large tree was snapped at its base in Ellendale.