Elevated instability from 1000-2000 J/kg along with 40-50 kt deep-layer shear sustained organized convection pushing though southeast South Dakota, southwest Minnesota and northwest Iowa.  Winds averaged from 60 to 80 mph along the path of the large scale bow echo, producing significant damage to trees and power lines, and minor damage to buildings along the path.

Thunderstorm Wind in MINNEHAHA, SOUTH DAKOTA
From 20-JUL-19 06:59:00 to 20-JUL-19 07:00:00 (CST-6)
Location: DELL RAPIDS
Magnitude: 64.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Measured by RWIS station.

Thunderstorm Wind in MOODY, SOUTH DAKOTA
From 20-JUL-19 06:59:00 to 20-JUL-19 07:00:00 (CST-6)
Location: FLANDREAU
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Measured by RWIS station.

Thunderstorm Wind in MOODY, SOUTH DAKOTA
From 20-JUL-19 06:57:00 to 20-JUL-19 06:58:00 (CST-6)
Location: FLANDREAU
Magnitude: 61.00 EG
Reported by: COOP Observer

Tree damage in Flandreau.

Thunderstorm Wind in MINNEHAHA, SOUTH DAKOTA
From 20-JUL-19 07:07:00 to 20-JUL-19 07:08:00 (CST-6)
Location: WEST SIOUX FALLS
Magnitude: 50.00 MG
Reported by: ASOS

Thunderstorm Wind in MINNEHAHA, SOUTH DAKOTA
From 20-JUL-19 07:16:00 to 20-JUL-19 07:17:00 (CST-6)
Location: WEST SIOUX FALLS
Magnitude: 57.00 MG
Reported by: ASOS

Thunderstorm Wind in MINNEHAHA, SOUTH DAKOTA
From 20-JUL-19 07:20:00 to 20-JUL-19 07:22:00 (CST-6)
Location: EAST SIOUX FALLS
Magnitude: 52.00 EG
Reported by: Public

Wind split a small maple tree.

Thunderstorm Wind in LINCOLN, SOUTH DAKOTA
From 20-JUL-19 07:35:00 to 20-JUL-19 07:37:00 (CST-6)
Location: CANTON MUNI ARPT
Magnitude: 51.00 MG
Reported by: Mesonet

Hail in MINNEHAHA, SOUTH DAKOTA
From 20-JUL-19 09:30:00 to 20-JUL-19 09:32:00 (CST-6)
Location: (FSD)JOE FOSS FLD SI
Magnitude: 0.75 
Reported by: Official NWS Observations

Hail in MINNEHAHA, SOUTH DAKOTA
From 20-JUL-19 09:42:00 to 20-JUL-19 09:44:00 (CST-6)
Location: CORSON
Magnitude: 0.75 
Reported by: Social Media

Thunderstorm Wind in BEADLE, SOUTH DAKOTA
From 20-JUL-19 05:07:00 to 20-JUL-19 05:07:00 (CST-6)
Location: (HON)HURON ARPT
Magnitude: 57.00 MG
Reported by: ASOS

Thunderstorm Wind in BEADLE, SOUTH DAKOTA
From 20-JUL-19 04:43:00 to 20-JUL-19 04:45:00 (CST-6)
Location: WOLSEY
Magnitude: 65.00 MG
Reported by: Department of Highways

Measured by RWIS station.

Thunderstorm Wind in JERAULD, SOUTH DAKOTA
From 20-JUL-19 04:54:00 to 20-JUL-19 04:58:00 (CST-6)
Location: CROW LAKE
Magnitude: 61.00 EG
Reported by: Public

Winds uprooted big trees and downed large branches. Corn and wheat flattened.

Thunderstorm Wind in BEADLE, SOUTH DAKOTA
From 20-JUL-19 04:54:00 to 20-JUL-19 04:55:00 (CST-6)
Location: BLOOMFIELD
Magnitude: 63.00 MG
Reported by: Social Media

Measured on personal weather station.  Damage to trees.

Thunderstorm Wind in BEADLE, SOUTH DAKOTA
From 20-JUL-19 05:00:00 to 20-JUL-19 05:02:00 (CST-6)
Location: (HON)HURON ARPT
Magnitude: 56.00 EG
Reported by: Public

Large branches down.

Thunderstorm Wind in BRULE, SOUTH DAKOTA
From 20-JUL-19 05:08:00 to 20-JUL-19 05:09:00 (CST-6)
Location: (9V9)CHAMBERLAIN ARP
Magnitude: 50.00 MG
Reported by: ASOS

Thunderstorm Wind in AURORA, SOUTH DAKOTA
From 20-JUL-19 05:25:00 to 20-JUL-19 05:27:00 (CST-6)
Location: PLANKINTON
Magnitude: 52.00 EG
Reported by: Emergency Manager

Strong thunderstorm winds produced tree damage.

Thunderstorm Wind in AURORA, SOUTH DAKOTA
From 20-JUL-19 05:29:00 to 20-JUL-19 05:30:00 (CST-6)
Location: PLANKINTON
Magnitude: 55.00 MG
Reported by: Department of Highways

Wind measured by RWIS station.

Thunderstorm Wind in KINGSBURY, SOUTH DAKOTA
From 20-JUL-19 05:38:00 to 20-JUL-19 05:40:00 (CST-6)
Location: IROQUOIS
Magnitude: 64.00 MG
Reported by: Emergency Manager

Thunderstorm winds brought down large trees.

Thunderstorm Wind in SANBORN, SOUTH DAKOTA
From 20-JUL-19 05:39:00 to 20-JUL-19 05:41:00 (CST-6)
Location: FORESTBURG
Magnitude: 65.00 MG
Reported by: Department of Highways

Thunderstorm winds measured by RWIS station.

Thunderstorm Wind in DAVISON, SOUTH DAKOTA
From 20-JUL-19 05:45:00 to 20-JUL-19 05:46:00 (CST-6)
Location: (MHE)MITCHELL ARPT
Magnitude: 51.00 MG
Reported by: ASOS

Thunderstorm Wind in BEADLE, SOUTH DAKOTA
From 20-JUL-19 05:04:00 to 20-JUL-19 05:04:00 (CST-6)
Location: (HON)HURON ARPT
Magnitude: 54.00 MG
Reported by: ASOS

Thunderstorm Wind in DAVISON, SOUTH DAKOTA
From 20-JUL-19 05:47:00 to 20-JUL-19 05:48:00 (CST-6)
Location: (MHE)MITCHELL ARPT
Magnitude: 56.00 MG
Reported by: ASOS

Thunderstorm Wind in AURORA, SOUTH DAKOTA
From 20-JUL-19 06:00:00 to 20-JUL-19 06:01:00 (CST-6)
Location: PLANKINTON
Magnitude: 52.00 MG
Reported by: Emergency Manager

Thunderstorm Wind in DAVISON, SOUTH DAKOTA
From 20-JUL-19 06:04:00 to 20-JUL-19 06:05:00 (CST-6)
Location: (MHE)MITCHELL ARPT
Magnitude: 59.00 MG
Reported by: ASOS

Thunderstorm Wind in AURORA, SOUTH DAKOTA
From 20-JUL-19 05:54:00 to 20-JUL-19 05:55:00 (CST-6)
Location: PLANKINTON
Magnitude: 63.00 MG
Reported by: Department of Highways

Measured by RWIS station.

Thunderstorm Wind in HANSON, SOUTH DAKOTA
From 20-JUL-19 06:14:00 to 20-JUL-19 06:15:00 (CST-6)
Location: ALEXANDRIA
Magnitude: 64.00 MG
Reported by: Department of Highways

Measured by RWIS station.

Thunderstorm Wind in AURORA, SOUTH DAKOTA
From 20-JUL-19 06:15:00 to 20-JUL-19 06:18:00 (CST-6)
Location: PLANKINTON
Magnitude: 61.00 EG
Reported by: Emergency Manager

Five to six inch diameter branches down across Plankinton.

Thunderstorm Wind in AURORA, SOUTH DAKOTA
From 20-JUL-19 06:16:00 to 20-JUL-19 06:16:00 (CST-6)
Location: STICKNEY
Magnitude: 65.00 EG
Property damage: 20.00K
Reported by: Emergency Manager

Extensive tree damage in Stickney. A tree fell onto power lines near a transformer, causing a power outage in town.

Thunderstorm Wind in LAKE, SOUTH DAKOTA
From 20-JUL-19 06:19:00 to 20-JUL-19 06:21:00 (CST-6)
Location: JUNIUS
Magnitude: 63.00 MG
Reported by: Trained Spotter

Thunderstorm Wind in MCCOOK, SOUTH DAKOTA
From 20-JUL-19 06:31:00 to 20-JUL-19 06:33:00 (CST-6)
Location: SALEM
Magnitude: 57.00 MG
Reported by: Emergency Manager

Thunderstorm Wind in MCCOOK, SOUTH DAKOTA
From 20-JUL-19 06:32:00 to 20-JUL-19 06:35:00 (CST-6)
Location: CANISTOTA
Magnitude: 65.00 EG
Reported by: Social Media

Heavy damage to the grain elevator in Canistota.

Thunderstorm Wind in BROOKINGS, SOUTH DAKOTA
From 20-JUL-19 06:33:00 to 20-JUL-19 06:34:00 (CST-6)
Location: (BKX)BROOKINGS MUNI
Magnitude: 65.00 MG
Reported by: AWOS

Thunderstorm Wind in LAKE, SOUTH DAKOTA
From 20-JUL-19 06:35:00 to 20-JUL-19 06:38:00 (CST-6)
Location: SMITHS PARK
Magnitude: 65.00 EG
Property damage: 10.00K
Reported by: Trained Spotter

Four boats were lifted off their racks along the south shore of Lake Madison.

Thunderstorm Wind in MCCOOK, SOUTH DAKOTA
From 20-JUL-19 06:38:00 to 20-JUL-19 06:40:00 (CST-6)
Location: CANISTOTA
Magnitude: 61.00 EG
Property damage: 10.00K
Reported by: Emergency Manager

Metal roof panels were ripped off a small apartment building.

Thunderstorm Wind in MCCOOK, SOUTH DAKOTA
From 20-JUL-19 06:54:00 to 20-JUL-19 06:56:00 (CST-6)
Location: MONTROSE
Magnitude: 63.00 MG
Reported by: Department of Highways

Measured by RWIS station.

Thunderstorm Wind in DAVISON, SOUTH DAKOTA
From 20-JUL-19 06:57:00 to 20-JUL-19 06:58:00 (CST-6)
Location: (MHE)MITCHELL ARPT
Magnitude: 61.00 MG
Reported by: ASOS