On August 10th, an intense derecho brought severe to extreme winds to much of the Midwest with winds estimated as high as 130 to 140 mph in Iowa.  As the derecho neared Indiana, the storms were not quite as intense, but did produce measured winds up to 70 mph and caused significant tree damage and power outages to the local area. Over 100,000 people were without power at one point with power outages lasting several days across portions of the state.

Thunderstorm Wind in MADISON, INDIANA
From 10-AUG-20 18:33:00 to 10-AUG-20 18:33:00 (EST-5)
Location: ANDERSON
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: State Official

One tree of unknown size was blown down into a house near Anderson University by  thunderstorm winds.

Thunderstorm Wind in MARION, INDIANA
From 10-AUG-20 18:33:00 to 10-AUG-20 18:33:00 (EST-5)
Location: CAMBY
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

A pear tree was blown down by thunderstorm wind gusts.

Thunderstorm Wind in MARION, INDIANA
From 10-AUG-20 18:34:00 to 10-AUG-20 18:34:00 (EST-5)
Location: MILLERSVILLE
Magnitude: 62.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds snapped off a 36 inch diameter live tree at its base.

Thunderstorm Wind in MARION, INDIANA
From 10-AUG-20 18:34:00 to 10-AUG-20 18:34:00 (EST-5)
Location: INDIANAPOLIS INTL AR
Magnitude: 53.00 MG
Reported by: ASOS

A 61 mph thunderstorm wind gust was measured at the KIND ASOS.

Thunderstorm Wind in MADISON, INDIANA
From 10-AUG-20 18:40:00 to 10-AUG-20 18:40:00 (EST-5)
Location: WOODLAWN HGTS
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Reports of  trees and power lines downed due to thunderstorm wind gusts. Nearby a few shingles and siding were blown off a business in northern Anderson and Frankton.

Thunderstorm Wind in MADISON, INDIANA
From 10-AUG-20 18:40:00 to 10-AUG-20 18:40:00 (EST-5)
Location: LINWOOD
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Trees were blown down by thunderstorm wind gusts just west of Linwood.  Time approximate.

Thunderstorm Wind in HANCOCK, INDIANA
From 10-AUG-20 18:48:00 to 10-AUG-20 18:48:00 (EST-5)
Location: GREENFIELD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Eight to ten inch diameter trees or tree limbs were blown down by thunderstorm winds.

Thunderstorm Wind in HANCOCK, INDIANA
From 10-AUG-20 18:48:00 to 10-AUG-20 18:48:00 (EST-5)
Location: POPE ARPT
Magnitude: 54.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Amateur Radio

At the 100 block of North and Apple street there are several 10 to 12 inch diameter live tree limbs downed due to thunderstorm winds.

Thunderstorm Wind in MARION, INDIANA
From 10-AUG-20 18:45:00 to 10-AUG-20 18:45:00 (EST-5)
Location: SUNSHINE GARDENS
Magnitude: 56.00 MG
Reported by: Public

A 65 mph thunderstorm wind gust was measured at this location.

Thunderstorm Wind in DELAWARE, INDIANA
From 10-AUG-20 18:55:00 to 10-AUG-20 18:55:00 (EST-5)
Location: CROSS RDS
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A twelve inch diameter live tree was blown down at its base by thunderstorm winds near County Roads 600 W and 700 S.

Flood in MARION, INDIANA
From 10-AUG-20 18:57:00 to 10-AUG-20 19:57:00 (EST-5)
Location: INDIANAPOLIS
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

I-65 southbound at the 111.7 mile marker near I-70 right two lanes of the interstate have standing water.

Thunderstorm Wind in BROWN, INDIANA
From 10-AUG-20 19:05:00 to 10-AUG-20 19:05:00 (EST-5)
Location: PEOGA
Magnitude: 52.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Trees down into power lines at Beech Tree and Nineveh roads. 18 other reports of trees down across Brown County.

Thunderstorm Wind in SHELBY, INDIANA
From 10-AUG-20 19:09:00 to 10-AUG-20 19:09:00 (EST-5)
Location: MT AUBURN
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A 25 inch diameter live with significant rot was blown down onto a road by  thunderstorm winds.

Thunderstorm Wind in JOHNSON, INDIANA
From 10-AUG-20 19:23:00 to 10-AUG-20 19:23:00 (EST-5)
Location: EDINBURG
Magnitude: 52.00 EG
Reported by: Trained Spotter

A 60 mph thunderstorm wind gust was measured at this location.

Thunderstorm Wind in DAVIESS, INDIANA
From 10-AUG-20 19:24:00 to 10-AUG-20 19:24:00 (EST-5)
Location: FARLEN
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Twelve inch diameter tree limbs were blown down from thunderstorm winds.

Thunderstorm Wind in MARION, INDIANA
From 10-AUG-20 18:47:00 to 10-AUG-20 18:47:00 (EST-5)
Location: MILLERSVILLE
Magnitude: 52.00 EG
Reported by: Public

A 60 mph thunderstorm wind gust was estimated at this location.

Thunderstorm Wind in BARTHOLOMEW, INDIANA
From 10-AUG-20 19:39:00 to 10-AUG-20 19:39:00 (EST-5)
Location: HOPE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Power lines downed by falling tree limbs due to thunderstorm wind gusts.

Thunderstorm Wind in BARTHOLOMEW, INDIANA
From 10-AUG-20 19:30:00 to 10-AUG-20 19:30:00 (EST-5)
Location: TAYLORSVILLE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Power lines downed by tree limbs that were knocked down by thunderstorm wind gusts.

Thunderstorm Wind in JACKSON, INDIANA
From 10-AUG-20 20:08:00 to 10-AUG-20 20:08:00 (EST-5)
Location: EWING
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Numerous trees and several power lines downed by thunderstorm wind gusts across Jackson county.

Thunderstorm Wind in HENDRICKS, INDIANA
From 10-AUG-20 18:15:00 to 10-AUG-20 18:15:00 (EST-5)
Location: BROWNSBURG
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

A tree of unknown size was blown down by thunderstorm winds.

Thunderstorm Wind in HOWARD, INDIANA
From 10-AUG-20 18:00:00 to 10-AUG-20 18:00:00 (EST-5)
Location: KOKOMO
Magnitude: 54.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

An estimated 12-18 inch diameter tree was blown down into the road due to thunderstorm wind gusts. Live power lines were also downed at the 4000 block of Sycamore St.

Thunderstorm Wind in MADISON, INDIANA
From 10-AUG-20 18:27:00 to 10-AUG-20 18:48:00 (EST-5)
Location: ELWOOD
Magnitude: 55.00 EG
Property damage: 150.00K
Crop damage: 0.00K
Reported by: State Official

Over 50 reports of trees and power lines downed by thunderstorm wind gusts. Most of which were in Anderson, Alexandria, and Elwood.

Flash Flood in JACKSON, INDIANA
From 10-AUG-20 20:30:00 to 10-AUG-20 20:50:00 (EST-5)
Location: EWING
Flood cause: Heavy Rain
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flash flooding occurred around Brownstown and Washington township. Water was flowing over several roads in town with highway department closing roads.

Thunderstorm Wind in VERMILLION, INDIANA
From 10-AUG-20 17:00:00 to 10-AUG-20 17:00:00 (EST-5)
Location: GESSIE
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: COOP Observer

Gust front ahead of line of storms caused power outage.  30 to 40 mph winds continued for several minutes after initial gust of 60 mph.

Thunderstorm Wind in FOUNTAIN, INDIANA
From 10-AUG-20 17:03:00 to 10-AUG-20 17:03:00 (EST-5)
Location: RIVERSIDE
Magnitude: 61.00 EG
Reported by: Trained Spotter

A 70 mph wind thunderstorm wind gust was estimated at this location.

Thunderstorm Wind in FOUNTAIN, INDIANA
From 10-AUG-20 17:01:00 to 10-AUG-20 17:01:00 (EST-5)
Location: ATTICA RILEY FLD ARP
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

A tree of unknown size was blown over due to thunderstorm wind gusts.

Thunderstorm Wind in TIPPECANOE, INDIANA
From 10-AUG-20 17:09:00 to 10-AUG-20 17:09:00 (EST-5)
Location: BATTLE GROUND
Magnitude: 55.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Numerous trees and limbs downed due to thunderstorm wind gusts around Battle Ground Indiana. Video and lots of pics of tree damage were received. Also, widespread power outages from Battle Ground to Burrows reported with much of Delphi without power.

Thunderstorm Wind in CARROLL, INDIANA
From 10-AUG-20 17:14:00 to 10-AUG-20 17:14:00 (EST-5)
Location: NORTH DELPHI
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

Trees of unknown size downed due to thunderstorm wind gusts across Old Indiana 25 going into Delphi at the Carroll and Tippecanoe county border going down the hill.

Thunderstorm Wind in TIPPECANOE, INDIANA
From 10-AUG-20 17:13:00 to 10-AUG-20 17:13:00 (EST-5)
Location: WELBORN ARPT
Magnitude: 55.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

A 16 inch diameter tree was uprooted due to thunderstorm wind gusts at this location.

Thunderstorm Wind in CARROLL, INDIANA
From 10-AUG-20 17:24:00 to 10-AUG-20 17:24:00 (EST-5)
Location: HARLEY
Magnitude: 61.00 EG
Reported by: Public

A 70 mph thunderstorm wind gust was estimated at this location.

Thunderstorm Wind in TIPPECANOE, INDIANA
From 10-AUG-20 17:13:00 to 10-AUG-20 17:13:00 (EST-5)
Location: LAFAYETTE
Magnitude: 55.00 MG
Reported by: Public

A 63 mph thunderstorm wind gust was measured at this location.

Thunderstorm Wind in FOUNTAIN, INDIANA
From 10-AUG-20 17:10:00 to 10-AUG-20 17:10:00 (EST-5)
Location: VEEDERSBURG
Magnitude: 58.00 MG
Reported by: Broadcast Media

A 67 mph thunderstorm wind gust was measured at this location.

Thunderstorm Wind in CARROLL, INDIANA
From 10-AUG-20 17:30:00 to 10-AUG-20 17:30:00 (EST-5)
Location: DEER CREEK
Magnitude: 56.00 MG
Reported by: Trained Spotter

A 65 mph thunderstorm wind gust was measured at this location.

Thunderstorm Wind in VIGO, INDIANA
From 10-AUG-20 17:57:00 to 10-AUG-20 17:57:00 (EST-5)
Location: PRESTON
Magnitude: 61.00 EG
Reported by: Amateur Radio

A 60 to 70 mph  thunderstorm wind gust was estimated at Fruitridge Avenue and Plum Street.

Thunderstorm Wind in HOWARD, INDIANA
From 10-AUG-20 17:48:00 to 10-AUG-20 17:48:00 (EST-5)
Location: RUSSIAVILLE
Magnitude: 61.00 MG
Reported by: Amateur Radio

A 70 mph thunderstorm wind gust was measured at SR 26 and 750 W.

Thunderstorm Wind in VIGO, INDIANA
From 10-AUG-20 17:57:00 to 10-AUG-20 17:57:00 (EST-5)
Location: TERRE HAUTE
Magnitude: 50.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Power lines downed due to thunderstorm wind gusts along south 7th st and across the rest of town.

Thunderstorm Wind in HOWARD, INDIANA
From 10-AUG-20 18:00:00 to 10-AUG-20 18:00:00 (EST-5)
Location: KOKOMO
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Six to eight inch diameter tree limbs were blown down by thunderstorm winds.

Thunderstorm Wind in PUTNAM, INDIANA
From 10-AUG-20 18:00:00 to 10-AUG-20 18:00:00 (EST-5)
Location: PLEASANT GARDEN
Magnitude: 54.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

An 18 to 24 inch diameter tree downed at the 4000 block of county road 1100s near  Reelsville. 3 power poles were snapped near the location. Fire rescue made 12 downed  tree calls during the evening with 30 to 40 across the county.

Thunderstorm Wind in GREENE, INDIANA
From 10-AUG-20 18:34:00 to 10-AUG-20 18:34:00 (EST-5)
Location: HOOSIER
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A 12 inch diameter tree limb was blown down by thunderstorm winds.

Thunderstorm Wind in HENDRICKS, INDIANA
From 10-AUG-20 18:08:00 to 10-AUG-20 18:08:00 (EST-5)
Location: PITTSBORO
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A 10 inch diameter tree was blown down by thunderstorm winds at the 500 block of north maple street.

Thunderstorm Wind in HENDRICKS, INDIANA
From 10-AUG-20 18:08:00 to 10-AUG-20 18:08:00 (EST-5)
Location: PITTSBORO
Magnitude: 60.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A live 24 inch diameter tree was blown down by thunderstorm winds at the intersection of County Road 275 East and County Road 1000 North.

Thunderstorm Wind in HENDRICKS, INDIANA
From 10-AUG-20 18:04:00 to 10-AUG-20 18:04:00 (EST-5)
Location: RAINTOWN
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A 12 inch diameter tree limb was blown down by thunderstorm winds at the intersection of State Road 39 and County Road 1025 north.

Thunderstorm Wind in HENDRICKS, INDIANA
From 10-AUG-20 18:20:00 to 10-AUG-20 18:20:00 (EST-5)
Location: AVON
Magnitude: 55.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

A tree roughly 18 inches in diameter was snapped due to thunderstorm wind gusts and fell onto utility lines.

Thunderstorm Wind in HENDRICKS, INDIANA
From 10-AUG-20 18:14:00 to 10-AUG-20 18:14:00 (EST-5)
Location: BROWNSBURG
Magnitude: 54.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: NWS Employee

A six to eight inch diameter tree was blown down onto utility lines due to thunderstorm wind gusts. Power line was snapped in 4 locations due to the fallen tree with power out for more than 36 hours.

Thunderstorm Wind in HENDRICKS, INDIANA
From 10-AUG-20 18:21:00 to 10-AUG-20 18:21:00 (EST-5)
Location: PLAINFIELD
Magnitude: 54.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down a 14 to 16 inch diameter tree across the road near or at the intersection of County Road 625 East and County Road 300 South.

Thunderstorm Wind in HENDRICKS, INDIANA
From 10-AUG-20 18:25:00 to 10-AUG-20 18:25:00 (EST-5)
Location: PLAINFIELD
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

A large tree limb approximately 8 to 10 inches in diameter was blown down by thunderstorm wind gusts.

Thunderstorm Wind in HENDRICKS, INDIANA
From 10-AUG-20 18:28:00 to 10-AUG-20 18:28:00 (EST-5)
Location: PLAINFIELD
Magnitude: 54.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

A tree and power lines were blown down from thunderstorm winds at County Road 200 South and Dan Jones Road.

Thunderstorm Wind in MORGAN, INDIANA
From 10-AUG-20 18:30:00 to 10-AUG-20 18:30:00 (EST-5)
Location: WHITAKER
Magnitude: 55.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Numerous trees of unknown size were downed by thunderstorm wind gusts.