During the late morning, and early afternoon of Friday, July 19th, a surface low moved from northeast South Dakota, eastward across central Minnesota, and into west central Wisconsin by the evening. There was a tight thermal gradient along the surface low/warm front across central Minnesota. During the afternoon, dew points rose to near 80 in the warm sector, with 50s/60s north of the front. This contrast produced MLCAPEs of near 5000 J/kg south of the front boundary. Effective wind shear parameters were very strong with values of 50-70 knots across central Minnesota, and into west central Wisconsin by the late afternoon. This environment allowed for supercells to form which congealed into a bow echo that raced across east central Minnesota, and into west central Wisconsin. Very large hail, damaging straight-line winds, and a few tornadoes occurred with this bow echo.
There was almost a continuous swath of large hail, measured up to golf ball size, that  fell from Stevens County, northeast through Pope, Douglas, and Todd Counties before 1230 CST. Damage occurred to cars, windows, and crops along the storm's path. Another severe storm developed west of Todd County, and moved across northern Todd County, and into Morrison County. There were numerous reports of large hail once again with the largest report of baseball size hail near Cushing. There were also reports of trees and power lines down across central and southwest Morrison County.
Most of the damage in Mille Lacs, and Kanabec Counties was associated with straight line winds, but there were a couple reports of large hail. The bow echo intensified as it moved across Kanabec County, into southern Pine and northern Chisago Counties.
The worst damage occurred from near Rush City, southeast into west central Wisconsin. The Chisago County fair had to be closed due to trees and power lines that were blown down throughout the fair grounds.

Hail in MORRISON, MINNESOTA
From 19-JUL-19 14:20:00 to 19-JUL-19 14:50:00 (CST-6)
Location: CUSHING
Magnitude: 2.75 
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

There were numerous reports of large hail, up to baseball size, that occurred across parts of Morrison County. Hail was reported near Cushing, then east-southeast to Randall, Camp Ripley area, and north of Freedhem. The same line of storms moved southeast to near Hillman, but no additional reports of hail was observed. However, the emergency managers did have reports of trees and power lines down across central Morrison County.

Hail in STEVENS, MINNESOTA
From 19-JUL-19 10:30:00 to 19-JUL-19 10:55:00 (CST-6)
Location: CHOKIO
Magnitude: 1.75 
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A swath of large hail, up to golf ball size, occurred from northwest of Chokio, to Donnelly. There were reports of larger hail, but no pictures were available. Damage occurred to vehicles, buildings (siding, rain gutters & shingles), and crops.

Hail in DOUGLAS, MINNESOTA
From 19-JUL-19 11:25:00 to 19-JUL-19 11:55:00 (CST-6)
Location: KENSINGTON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous reports of large hail occurred from north of Farwell, to north of Forada, and south of Osakis. The largest hail stone was golf ball size north of Forada. This is the continuation of the long hail swath that developed across Stevens County, and moved into far northwest Pope County, before entering Douglas County near Farwell.

Hail in TODD, MINNESOTA
From 19-JUL-19 11:55:00 to 19-JUL-19 12:25:00 (CST-6)
Location: WEST UNION
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

This is the continuation of a swath of large hail that developed across Stevens County, and moved northeast across northwest Pope, southeast Douglas, and over the southern part of Todd County. There was a measured report of golf ball size hail north of West Union. This swath of large hail continued to north of Swanville.

Hail in TODD, MINNESOTA
From 19-JUL-19 14:04:00 to 19-JUL-19 14:04:00 (CST-6)
Location: CLARISSA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in KANABEC, MINNESOTA
From 19-JUL-19 15:15:00 to 19-JUL-19 15:15:00 (CST-6)
Location: QUAMBA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CHISAGO, MINNESOTA
From 19-JUL-19 15:50:00 to 19-JUL-19 15:50:00 (CST-6)
Location: RUSH CITY MUNI ARPT
Magnitude: 2.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in KANABEC, MINNESOTA
From 19-JUL-19 14:50:00 to 19-JUL-19 15:25:00 (CST-6)
Location: OGILVIE
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

There was a large swath of trees and power lines blown down from north of Ogilvie, on the Mille Lacs, and Kanabec County line, southeast to north of Grasston. There was also damage that occurred around Mora.

Hail in POPE, MINNESOTA
From 19-JUL-19 11:10:00 to 19-JUL-19 11:25:00 (CST-6)
Location: FARWELL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A swath of large hail, with a measured report of quarter size near Farwell, occurred across northwest Pope County.

Thunderstorm Wind in MILLE LACS, MINNESOTA
From 19-JUL-19 14:45:00 to 19-JUL-19 14:55:00 (CST-6)
Location: ONAMIA
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The local emergency manager indicated that a few trees and power lines were blown down from southwest of Onamia, to the Kanabec County line.

Thunderstorm Wind in CHISAGO, MINNESOTA
From 19-JUL-19 16:05:00 to 19-JUL-19 16:10:00 (CST-6)
Location: ALMELUND
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The Wild River State Park had damage throughout their park area. Numerous trees were blown down and blocked roads in and out of the park.

Thunderstorm Wind in CHISAGO, MINNESOTA
From 19-JUL-19 15:35:00 to 19-JUL-19 16:05:00 (CST-6)
Location: RUSH PT
Magnitude: 70.00 EG
Property damage: 250.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The bow echo that moved across Pine County, continued to intensify. It moved from the northern part of Chisago County, southeast into Polk County in Wisconsin. The path of straight line winds was noted as it crossed interstate 35 where very large trees were uprooted or blown down. There was damage to barns, outbuildings and homes along the path. The Chisago County fair grounds was closed due to blown down trees and power lines in Rush City.

Hail in STEVENS, MINNESOTA
From 19-JUL-19 10:55:00 to 19-JUL-19 11:10:00 (CST-6)
Location: DONNELLY
Magnitude: 1.75 
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The swath of large hail continued through the rest of Stevens County to the Douglas County line. The largest hail stone measured was golf ball size.

Hail in TODD, MINNESOTA
From 19-JUL-19 13:47:00 to 19-JUL-19 13:47:00 (CST-6)
Location: BERTHA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement