Convectively enhanced vorticity max lead to initiation of storms overnight Sunday across southern South Dakota. These initial storms grew upscale given concurrent downstream destabilization through northeast Nebraska and northwest Iowa. Widespread 80-100 mph winds developed through central/eastern Iowa as this derecho matured. Northern bookend and advection wing forcing led to some supercell structures across northern Illinois/southwest Wisconsin. Northern bookend turned northeast as it moved across Lake Michigan and tracked into western Michigan. As this occurred, attendant post convective wake low weakened as it crossed the lake. Thus the local area did not experience the 80 to 100 mph winds that N IL/E IA experienced. However the resultant slowing and breakup of the line as it moved across northwest Indiana/SW Michigan, yielded a LEWP and subsequent multiple small scale circulations developing along the line. These meso-vortices were associated with pockets of enhanced wind damage and brief tornado occurrences.

Thunderstorm Wind in HUNTINGTON, INDIANA
From 10-AUG-20 18:16:00 to 10-AUG-20 18:17:00 (EST-5)
Location: MAHON
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported a 25 foot tall tree was snapped two to three from the ground, landing onto a fence.

Thunderstorm Wind in HUNTINGTON, INDIANA
From 10-AUG-20 18:16:00 to 10-AUG-20 18:17:00 (EST-5)
Location: ROANOKE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management officials reported mature corn was blown down in a field.

Thunderstorm Wind in HUNTINGTON, INDIANA
From 10-AUG-20 18:19:00 to 10-AUG-20 18:20:00 (EST-5)
Location: ROANOKE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported large trees down on private property.

Thunderstorm Wind in NOBLE, INDIANA
From 10-AUG-20 18:17:00 to 10-AUG-20 18:18:00 (EST-5)
Location: BAKERTOWN
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement officials reported a large tree was blown down.

Thunderstorm Wind in WHITLEY, INDIANA
From 10-AUG-20 18:20:00 to 10-AUG-20 18:21:00 (EST-5)
Location: LAUD
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management officials reported a tree was blown down onto a home, with notable damage to the residence.

Thunderstorm Wind in WHITLEY, INDIANA
From 10-AUG-20 18:21:00 to 10-AUG-20 18:22:00 (EST-5)
Location: CHURUBUSCO
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management officials reported power poles were blown down.

Thunderstorm Wind in HUNTINGTON, INDIANA
From 10-AUG-20 18:23:00 to 10-AUG-20 18:24:00 (EST-5)
Location: ROANOKE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management officials reported numerous large tree branches down onto a home.

Thunderstorm Wind in WHITLEY, INDIANA
From 10-AUG-20 18:23:00 to 10-AUG-20 18:24:00 (EST-5)
Location: CHURUBUSCO
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a tree was blown down onto a home.

Thunderstorm Wind in HUNTINGTON, INDIANA
From 10-AUG-20 18:20:00 to 10-AUG-20 18:21:00 (EST-5)
Location: SIMPSON
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported several trees down blocking the road near County Road 900 North and 300 East. Damage was also noted to a home.

Thunderstorm Wind in ST. JOSEPH, INDIANA
From 10-AUG-20 17:36:00 to 10-AUG-20 17:37:00 (EST-5)
Location: GLENWOOD
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters reported several trees were blown down.

Thunderstorm Wind in KOSCIUSKO, INDIANA
From 10-AUG-20 17:40:00 to 10-AUG-20 17:41:00 (EST-5)
Location: MENTONE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management officials reported several large trees were blown down. One of these trees fell onto a residence. No one was injured.

Thunderstorm Wind in ELKHART, INDIANA
From 10-AUG-20 17:44:00 to 10-AUG-20 17:45:00 (EST-5)
Location: NAPPANEE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported several large trees were blown down in Nappanee.

Thunderstorm Wind in MIAMI, INDIANA
From 10-AUG-20 17:48:00 to 10-AUG-20 17:49:00 (EST-5)
Location: PERU
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported large trees were blown down in Peru.

Thunderstorm Wind in ELKHART, INDIANA
From 10-AUG-20 17:35:00 to 10-AUG-20 17:36:00 (EST-5)
Location: (EKM)ELKHART MUNI AR
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported a tree as well as power line down over a local road.

Thunderstorm Wind in KOSCIUSKO, INDIANA
From 10-AUG-20 17:54:00 to 10-AUG-20 17:55:00 (EST-5)
Location: WARSAW
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Local media shared pictures of several large tree branches blown down.

Thunderstorm Wind in KOSCIUSKO, INDIANA
From 10-AUG-20 17:50:00 to 10-AUG-20 17:51:00 (EST-5)
Location: OSWEGO
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

An off duty NWS employee reported a large tree limb, over 2 feet in diameter, was blown down onto North County Road 300 East, south of East County Road 750 North. Rot was noted on the tree where it broke off.

Thunderstorm Wind in KOSCIUSKO, INDIANA
From 10-AUG-20 17:54:00 to 10-AUG-20 17:55:00 (EST-5)
Location: LEESBURG
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported several large tree limbs down in the town of Leesburg.

Thunderstorm Wind in KOSCIUSKO, INDIANA
From 10-AUG-20 17:50:00 to 10-AUG-20 17:51:00 (EST-5)
Location: LEESBURG
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Local media shared a picture of a large tree branch down across State Route 15, just south of Leesburg. Some signs of rot were visible.

Thunderstorm Wind in ALLEN, INDIANA
From 10-AUG-20 18:45:00 to 10-AUG-20 18:46:00 (EST-5)
Location: BROOKSIDE ESTATES
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A mobile home rolled due to a failure of 1 or more properly secured straps from strong winds. A 74 year old woman was  critically injured and later died at a nearby hospital. The woman was holding a 4 year old boy that only suffered minor injuries. The home rolled into an adjacent double wide mobile home. The initial mobile home was destroyed but all debris remained near the site. The adjacent mobile home suffered damage to the side and roof due to the home striking it. Other damage in the area was limited to some skirting of the mobile homes.

Thunderstorm Wind in KOSCIUSKO, INDIANA
From 10-AUG-20 17:57:00 to 10-AUG-20 17:58:00 (EST-5)
Location: BARBEE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

An off duty NWS employee reported a large tree was blown down.

Thunderstorm Wind in NOBLE, INDIANA
From 10-AUG-20 18:05:00 to 10-AUG-20 18:06:00 (EST-5)
Location: CROMWELL
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees were reported down by trained spotters.

Thunderstorm Wind in HUNTINGTON, INDIANA
From 10-AUG-20 18:14:00 to 10-AUG-20 18:15:00 (EST-5)
Location: GOBLESVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management officials shared a picture of a healthy tree snapped at the base.

Thunderstorm Wind in WHITLEY, INDIANA
From 10-AUG-20 18:05:00 to 10-AUG-20 18:06:00 (EST-5)
Location: SOUTH WHITLEY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management officials reported trees and power lines were blown down.

Thunderstorm Wind in HUNTINGTON, INDIANA
From 10-AUG-20 18:14:00 to 10-AUG-20 18:15:00 (EST-5)
Location: GOBLESVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management officials reported an empty grain bin was toppled.

Thunderstorm Wind in HUNTINGTON, INDIANA
From 10-AUG-20 18:16:00 to 10-AUG-20 18:17:00 (EST-5)
Location: HUNTINGTON
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management officials reported a large portion of a tree was down per a shared picture.

Thunderstorm Wind in STARKE, INDIANA
From 10-AUG-20 16:10:00 to 10-AUG-20 16:11:00 (CST-6)
Location: BREMS
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The automated weather observation system at the Starke County airport recorded a 63 mph wind gust.

Thunderstorm Wind in ALLEN, INDIANA
From 10-AUG-20 18:30:00 to 10-AUG-20 18:31:00 (EST-5)
Location: FT WAYNE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Dispatch reported trees and power lines down across mainly the northern parts of Fort Wayne.

Thunderstorm Wind in HUNTINGTON, INDIANA
From 10-AUG-20 18:23:00 to 10-AUG-20 18:24:00 (EST-5)
Location: ROANOKE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management officials reported a new barn that was under construction sustained significant roof and wall damage.

Tornado in ST. JOSEPH, INDIANA
From 10-AUG-20 17:32:00 to 10-AUG-20 17:37:00 (EST-5)
Location: WYATT
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado began west of the intersection of Riley Road and Dogwood Road in southeast St. Joseph County.  It then tracked along and south of Riley Road. Widespread tree and structural damage occurred through this path.  Grain bins were toppled and farm outbuildings sustained damage.  The tornado tracked through several cornfields that resulted in significant crop damage. The tornado lifted east of Beech Road. Maximum winds were estimated at 110 mph.

Thunderstorm Wind in ALLEN, INDIANA
From 10-AUG-20 18:35:00 to 10-AUG-20 18:36:00 (EST-5)
Location: BROOKSIDE ESTATES
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported the top half of a one foot diameter was snapped at the intersection of Leo Road and Arapaho Passover.

Thunderstorm Wind in ALLEN, INDIANA
From 10-AUG-20 18:38:00 to 10-AUG-20 18:39:00 (EST-5)
Location: NINE MILE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Amateur radio operators reported a semi was blown onto it side.

Thunderstorm Wind in ALLEN, INDIANA
From 10-AUG-20 18:32:00 to 10-AUG-20 18:33:00 (EST-5)
Location: PRAIRIE SWITCH
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter measured a 69 mph wind gust.

Tornado in KOSCIUSKO, INDIANA
From 10-AUG-20 17:55:00 to 10-AUG-20 18:00:00 (EST-5)
Location: NORTH WEBSTER
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Trees were snapped west of State Route 13 as the tornado touched down. The tornado pushed over 2 power poles as it crossed SR 13, then continued southeast, causing a notable path of snapped trees and broken limbs. The debris was scattered throughout a nearby church parking lot. The church sustained minor loss of roof covering. Additional areas of tree damage were noted farther to the east-southeast. Some homes sustained damage as a result of falling trees and branches. The tornado crossed Webster Lake, coming onshore around EMS W17 Lane, where extensive tree damage occurred. Some residence damage was noted, both from the winds and falling trees. The tornado crossed East Backwater Road/East County Road 600 North and dissipated.

Tornado in KOSCIUSKO, INDIANA
From 10-AUG-20 18:43:00 to 10-AUG-20 18:44:00 (EST-5)
Location: BURKET
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tornado touched down just west of the intersection of South County Road 700 North and South Beaver Dam Road, causing damage to trees to properties on either side of that intersection, with debris left on the roadway. A local fire chief witnessed the tornado lift over two structures and a grain bin with no noted damage. The tornado then touched down just east of the intersection in a mature corn field where it flattened a 100 to 150 foot circle in the corn, lifted briefly and then touched down again, causing the same type of damage before lifting again. The funnel attempted to touch down a third time but dissipated near a row of trees. Debris was still visible in the air. Maximum winds were estimated at 80 mph.

Thunderstorm Wind in ALLEN, INDIANA
From 10-AUG-20 18:57:00 to 10-AUG-20 18:58:00 (EST-5)
Location: TAYLOR ARPT
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Amateur radio operators reported a semi was overturned on US 24, northeast of Fort Wayne.

Thunderstorm Wind in ST. JOSEPH, INDIANA
From 10-AUG-20 01:43:00 to 10-AUG-20 01:44:00 (EST-5)
Location: ROSELAND
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Local media shared a photo of a healthy looking, partially snapped tree.

Thunderstorm Wind in LA PORTE, INDIANA
From 10-AUG-20 15:48:00 to 10-AUG-20 15:49:00 (CST-6)
Location: HASKELLS
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported a large tree was blown down.

Thunderstorm Wind in WHITE, INDIANA
From 10-AUG-20 17:05:00 to 10-AUG-20 17:06:00 (EST-5)
Location: GUERNSEY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported a roughly one foot diameter tree was blown down across Lowes Road Bridge, blocking traffic.

Thunderstorm Wind in WABASH, INDIANA
From 10-AUG-20 17:55:00 to 10-AUG-20 17:56:00 (EST-5)
Location: NORTH MANCHESTER
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management officials reported large tree limbs were blown down in North Manchester.

Thunderstorm Wind in WHITE, INDIANA
From 10-AUG-20 17:08:00 to 10-AUG-20 17:09:00 (EST-5)
Location: SITKA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported a power line was blown down at County Road 500 North and 700 East.

Thunderstorm Wind in WHITE, INDIANA
From 10-AUG-20 17:10:00 to 10-AUG-20 17:11:00 (EST-5)
Location: IDAVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported a tree was blown down across a road with a power line entangled in it.

Thunderstorm Wind in WHITE, INDIANA
From 10-AUG-20 17:10:00 to 10-AUG-20 17:11:00 (EST-5)
Location: SITKA
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported a one to two foot diameter tree was blown down and blocking the road on East County Road 400 North, bear Raccoon Circle.

Thunderstorm Wind in KOSCIUSKO, INDIANA
From 10-AUG-20 17:45:00 to 10-AUG-20 17:46:00 (EST-5)
Location: MONOQUET
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

An off duty NWS employee reported tree damage in the Northwest woods subdivision. Three healthy, one to two foot diameter trees were blown down. Numerous small to medium limbs (three to eight inches) were also blown down.

Thunderstorm Wind in FULTON, INDIANA
From 10-AUG-20 17:30:00 to 10-AUG-20 17:31:00 (EST-5)
Location: LAKE MANITOU
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters reported several trees were blown down.

Thunderstorm Wind in MARSHALL, INDIANA
From 10-AUG-20 17:30:00 to 10-AUG-20 17:31:00 (EST-5)
Location: BOURBON
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Amateur radio operators reported trees and power lines were down in the area.

Thunderstorm Wind in MARSHALL, INDIANA
From 10-AUG-20 17:30:00 to 10-AUG-20 17:31:00 (EST-5)
Location: PLYMOUTH
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported numerous trees and power lines down across Plymouth.

Thunderstorm Wind in NOBLE, INDIANA
From 10-AUG-20 18:29:00 to 10-AUG-20 18:30:00 (EST-5)
Location: KENDALLVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported a large tree was blown down and power lines down in Kendallville.

Thunderstorm Wind in STEUBEN, INDIANA
From 10-AUG-20 18:33:00 to 10-AUG-20 18:34:00 (EST-5)
Location: FLINT
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management officials reported a power pole snapped in the Lake Arrowhead area.

Thunderstorm Wind in DE KALB, INDIANA
From 10-AUG-20 18:40:00 to 10-AUG-20 18:41:00 (EST-5)
Location: CEDAR
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Local law enforcement reported multiple trees and large tree branches down across State Route 327, between County Roads 56 and 64.