During the late morning of Saturday, July 11th, several clusters of thunderstorms developed across southwest, and west central Minnesota, and moved southeast along a strengthening gradient of instability and wind shear. There were numerous reports of large hail as a complex of storms began to organize, with hail stones measured up to 2.5 inches in diameter from a swath across southern Kandiyohi, western Renville, southwest McLeod, and parts of northwest, and central Sibley County.
This hail storm was very significant in terms of crop damage as the swath of hail was up to 60 miles long and six miles wide. This affected thousands of acres of corn, soy beans, kidney beans, sugar beets, peas, sweet corn, and alfalfa. Acres upon acres were impacted and millions of dollars were lost. The University of Minnesota Extension looked into the damage and indicated the extent of damage to corn stalk and soybean farms was critical due to the time of year. The worst areas were in Renville, McLeod and Sibley Counties of south central Minnesota.
The storm shifted from a large hail event, to a wind event as a bow echo developed across Nicollet County and moved southeast quickly over portions of south central Minnesota. The most intense part of the storm early was northwest of Mankato, where a tornado touched down and uprooted trees and tore part of a roof off a machine shed. The bow echo continued to produce wind damage southeast across Blue Earth, and portions of Le Sueur Counties.

Thunderstorm Wind in FREEBORN, MINNESOTA
From 11-JUL-20 15:30:00 to 11-JUL-20 15:30:00 (CST-6)
Location: GENEVA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A tree was blown down.

Thunderstorm Wind in LE SUEUR, MINNESOTA
From 11-JUL-20 14:30:00 to 11-JUL-20 14:30:00 (CST-6)
Location: CLEVELAND
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A few large tree limbs were blown down south of Cleveland.

Thunderstorm Wind in BLUE EARTH, MINNESOTA
From 11-JUL-20 14:40:00 to 11-JUL-20 14:40:00 (CST-6)
Location: MADISON LAKE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several large tree limbs were blown down.

Thunderstorm Wind in BLUE EARTH, MINNESOTA
From 11-JUL-20 14:40:00 to 11-JUL-20 14:40:00 (CST-6)
Location: MADISON LAKE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Numerous trees were blown down north of Duck Lake, some were blocking county road 26.

Tornado in NICOLLET, MINNESOTA
From 11-JUL-20 14:09:00 to 11-JUL-20 14:13:00 (CST-6)
Location: NICOLLET
Tornado F-scale: EF0
Property damage: 25.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Hundreds of trees were broken or uprooted. Numerous swaths of corn were flattened. Portion of roof were torn off a machine shed.

Hail in LE SUEUR, MINNESOTA
From 11-JUL-20 04:25:00 to 11-JUL-20 04:25:00 (CST-6)
Location: MONTGOMERY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in BLUE EARTH, MINNESOTA
From 11-JUL-20 14:27:00 to 11-JUL-20 14:27:00 (CST-6)
Location: (MKT)MANKATO MUNI AR
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Hail in SIBLEY, MINNESOTA
From 11-JUL-20 12:50:00 to 11-JUL-20 13:00:00 (CST-6)
Location: GIBBON
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 500.00K
Reported by: Trained Spotter

The swath of large hail, up to 2.5 inches in diameter, and the continued wind driven hail, occurred in the northern part of Sibley County, southwest and south of Stewart. Major crop damage continued along this path.

Hail in RENVILLE, MINNESOTA
From 11-JUL-20 12:15:00 to 11-JUL-20 12:50:00 (CST-6)
Location: BIRD ISLAND
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 1.00M
Reported by: Trained Spotter

There was a swath of large hail, up to 2 inches in diameter, including wind driven hail, that occurred along the Kandiyohi/Renville County line, southwest to the Renville/Sibley County line between Buffalo Lake and Stewart. Local farmers had major damage to their corn and soybean fields.

Thunderstorm Wind in NICOLLET, MINNESOTA
From 11-JUL-20 14:05:00 to 11-JUL-20 14:05:00 (CST-6)
Location: NICOLLET
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

About one dozen large branches were broken.

Thunderstorm Wind in NICOLLET, MINNESOTA
From 11-JUL-20 14:07:00 to 11-JUL-20 14:07:00 (CST-6)
Location: NICOLLET
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Several trees were uprooted and numerous large branches were broken.

Thunderstorm Wind in WASECA, MINNESOTA
From 11-JUL-20 14:40:00 to 11-JUL-20 14:40:00 (CST-6)
Location: SMITHS MILL
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several trees were blown down and corn was flattened.

Thunderstorm Wind in WASECA, MINNESOTA
From 11-JUL-20 14:45:00 to 11-JUL-20 14:45:00 (CST-6)
Location: JANESVILLE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree was snapped. A video was also included which illustrated the near zero visibility.

Thunderstorm Wind in KANDIYOHI, MINNESOTA
From 11-JUL-20 11:28:00 to 11-JUL-20 11:28:00 (CST-6)
Location: PENNOCK
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A power pole was blown down.

Thunderstorm Wind in SWIFT, MINNESOTA
From 11-JUL-20 10:49:00 to 11-JUL-20 10:49:00 (CST-6)
Location: DE GRAFF
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

A large tree limb was blown off and landed on U.S. Highway 12 near County Road 31.

Hail in POPE, MINNESOTA
From 11-JUL-20 13:06:00 to 11-JUL-20 13:08:00 (CST-6)
Location: STARBUCK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in POPE, MINNESOTA
From 11-JUL-20 13:24:00 to 11-JUL-20 13:24:00 (CST-6)
Location: TERRACE
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MCLEOD, MINNESOTA
From 11-JUL-20 13:00:00 to 11-JUL-20 13:08:00 (CST-6)
Location: STEWART
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 250.00K
Reported by: Trained Spotter

This is the continued swath of large hail, up to 2 inches in diameter, that occurred in far southwest McLeod County between Stewart and Fernando.

Thunderstorm Wind in NICOLLET, MINNESOTA
From 11-JUL-20 13:55:00 to 11-JUL-20 13:55:00 (CST-6)
Location: COURTLAND
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Several large tree branches were blown down in Courtland.

Thunderstorm Wind in NICOLLET, MINNESOTA
From 11-JUL-20 14:02:00 to 11-JUL-20 14:02:00 (CST-6)
Location: NICOLLET
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A road sign was damaged and a roof west of Nicollet on Highway 14.

Hail in RENVILLE, MINNESOTA
From 11-JUL-20 12:15:00 to 11-JUL-20 12:15:00 (CST-6)
Location: BIRD ISLAND
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Thunderstorm Wind in BLUE EARTH, MINNESOTA
From 11-JUL-20 14:25:00 to 11-JUL-20 14:25:00 (CST-6)
Location: MANKATO
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several large tree branches were blown down in Mankato.

Hail in KANDIYOHI, MINNESOTA
From 11-JUL-20 12:07:00 to 11-JUL-20 12:07:00 (CST-6)
Location: LAKE LILLIAN
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in SIBLEY, MINNESOTA
From 11-JUL-20 13:08:00 to 11-JUL-20 13:35:00 (CST-6)
Location: WINTHROP
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 100.00K
Reported by: Trained Spotter

The final swath of large hail, up to 1.75 inches in diameter, moved across central Sibley County between Fernando, and southeast of Winthrop.

Thunderstorm Wind in KANDIYOHI, MINNESOTA
From 11-JUL-20 11:33:00 to 11-JUL-20 11:34:00 (CST-6)
Location: (BDH)WILLMAR MUNICIPAL AIRPORT
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in BLUE EARTH, MINNESOTA
From 11-JUL-20 14:30:00 to 11-JUL-20 14:30:00 (CST-6)
Location: EAGLE LAKE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Several large trees were snapped off from the top.

Hail in MARTIN, MINNESOTA
From 11-JUL-20 14:43:00 to 11-JUL-20 14:45:00 (CST-6)
Location: FAIRMONT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

There was a picture of quarter size hail on social media.