During the late morning through the afternoon of Monday August 10th, a line of intense thunderstorms known as a derecho brought widespread severe wind damage across Iowa, northern Illinois and northern Indiana.
In north central and northeast Illinois alone, the severe winds of 60 to 100 mph downed or damaged tens of thousands of trees, as well as caused severe damage to homes, businesses, and infrastructure.  There were 10 injuries reported in north central and northeast Illinois within the NWS Chicago/Romeoville County Warning Area (CWA).  Local officials estimated that nearly one million customers lost power across northern Illinois at the height of the derecho and some people were without power for several days.  Damage was estimated to be in the hundreds of millions of dollars in north central and northeast Illinois, with several billions of dollars in damages across the entire Corn Belt region including significant damage to crops and agriculture infrastructure.  While much of the damage was due to straight line winds, there were also 14 tornadoes documented in north central and northeast Illinois.
The combination of high moisture, explosive instability and very strong atmospheric wind flow for mid-summer had developed quickly over the Corn Belt region on the morning of August 10th.  This resulted in a progressive, well-organized complex of storms for hundreds of miles and at times traveling nearly 70 mph.  After bringing extensive damage from extreme wind speeds in Iowa that morning, the damage transitioned across northern Illinois from widespread wind damage to narrow, brief and intense swaths associated with compact circulations within the thunderstorm line, some of which were associated with tornadoes.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 10-AUG-20 14:17:00 to 10-AUG-20 14:17:00 (CST-6)
Location: VERONA
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A grain bin was damaged.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 10-AUG-20 14:38:00 to 10-AUG-20 14:38:00 (CST-6)
Location: (DPA)DUPAGE CO ARPT
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A wind gust to 62 mph was measured at the DuPage Airport.

Thunderstorm Wind in LIVINGSTON, ILLINOIS
From 10-AUG-20 14:17:00 to 10-AUG-20 14:18:00 (CST-6)
Location: DWIGHT
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous metal farm buildings were damaged including roofs and metal siding blown off.  A large tree was snapped and fell onto a house.

Thunderstorm Wind in KANE, ILLINOIS
From 10-AUG-20 14:25:00 to 10-AUG-20 14:25:00 (CST-6)
Location: ST CHARLES
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A 14 inch diameter tree was split in half in St. Charles.  Power lines were also blown down.

Thunderstorm Wind in LAKE, ILLINOIS
From 10-AUG-20 14:44:00 to 10-AUG-20 14:45:00 (CST-6)
Location: ROUND LAKE HGTS
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees, tree limbs and power lines were blown down in Lake Villa.  One tree fell onto a house in unincorporated Lake Villa causing the homeowner to sustain a minor injury.  Another tree fell onto a SUV causing significant damage to the roof and windshield.  Trees and power lines were blown down blocking portions of Route 83.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 10-AUG-20 14:40:00 to 10-AUG-20 14:40:00 (CST-6)
Location: (O6C) SCHAUMBURG REGIONAL AIRPORT
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Large tree limbs were blown down west of Roselle.

Thunderstorm Wind in WILL, ILLINOIS
From 10-AUG-20 14:45:00 to 10-AUG-20 14:45:00 (CST-6)
Location: BRISBANE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Traffic signals and a large tree were damaged near Delaney and Cedar Roads.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:56:00 to 10-AUG-20 14:56:00 (CST-6)
Location: DUNNING
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A large sign for an auto dealer was blown down from south to north onto a car parked on Irving Park Road.

Thunderstorm Wind in KANE, ILLINOIS
From 10-AUG-20 14:23:00 to 10-AUG-20 14:23:00 (CST-6)
Location: GENEVA
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

An Oak tree was blown down blocking Fulton Street.

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 10-AUG-20 15:04:00 to 10-AUG-20 15:05:00 (CST-6)
Location: ST ANNE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Tree limbs and power lines were blown down in St. Anne.  The worst damage was outside the village, in St. Anne Township.

Hail in KENDALL, ILLINOIS
From 10-AUG-20 14:30:00 to 10-AUG-20 14:30:00 (CST-6)
Location: OSWEGO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Nickel to quarter size hail was reported in Oswego.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 10-AUG-20 14:17:00 to 10-AUG-20 14:17:00 (CST-6)
Location: VERONA
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two utility poles were snapped along Verona Road.

Thunderstorm Wind in LEE, ILLINOIS
From 10-AUG-20 13:25:00 to 10-AUG-20 13:25:00 (CST-6)
Location: HARMON
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several tree limbs were blown down.  Exterior siding of a house was peeled away.

Thunderstorm Wind in KENDALL, ILLINOIS
From 10-AUG-20 14:20:00 to 10-AUG-20 14:20:00 (CST-6)
Location: YORKVILLE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several trees and large tree limbs were blown down.

Thunderstorm Wind in MCHENRY, ILLINOIS
From 10-AUG-20 14:30:00 to 10-AUG-20 14:30:00 (CST-6)
Location: RICHMOND
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tree over one foot in diameter was snapped near Route 12 and Route 173.

Thunderstorm Wind in MCHENRY, ILLINOIS
From 10-AUG-20 14:19:00 to 10-AUG-20 14:20:00 (CST-6)
Location: WOODSTOCK ARPT
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Tree limbs and power lines were blown down in Woodstock with some roads blocked.

Thunderstorm Wind in WINNEBAGO, ILLINOIS
From 10-AUG-20 13:39:00 to 10-AUG-20 13:46:00 (CST-6)
Location: RCKFRD COTTONWOOD AR
Magnitude: 74.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Widespread tree damage occurred in Rockford with trees snapped and uprooted and large tree limbs blown down.  At least 150 utility poles were damaged along with power lines blown down.  Hundreds of homes were damaged by falling tree limbs.

Tornado in KENDALL, ILLINOIS
From 10-AUG-20 14:15:00 to 10-AUG-20 14:26:00 (CST-6)
Location: YORKVILLE
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado with peak winds of 105 mph touched down near Walsh Drive, just north of Route 71.  A pergola was destroyed, siding was ripped off a house and parts of a fence and a tree were thrown over a road.  Eyewitness accounts indicated the debris was lifted and twirled.  The tornado continued moving east southeast producing damage to trees along Route 126.  The most significant damage was found east of Schlapp Road along Wheeler Road where trees were mangled, a farm building was destroyed with debris deposited in a nearby field and a large grain bin was bent inward.  Wood panels were thrown into the ground leaving scour marks in the grass.  Six utility poles were snapped along Ridge Road and a 1000-1500 pound auger was moved about 50 feet.  This is where the tornado likely reached peak intensity.  The tornado continued southeast crossing into Will County just south of Renwick Road.

Hail in COOK, ILLINOIS
From 10-AUG-20 14:50:00 to 10-AUG-20 15:00:00 (CST-6)
Location: GLENCOE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Nickel size hail fell across Glencoe for 10 minutes.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:58:00 to 10-AUG-20 14:59:00 (CST-6)
Location: FLOSSMOOR
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Tree limbs and power lines were blown down in Flossmoor.

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 10-AUG-20 15:11:00 to 10-AUG-20 15:13:00 (CST-6)
Location: WICHERT
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees, tree limbs and power lines were blown down in Pembroke Township.  Almost everyone lost power.

Tornado in COOK, ILLINOIS
From 10-AUG-20 14:59:00 to 10-AUG-20 15:04:00 (CST-6)
Location: LINCOLNWOOD
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado with peak winds of 110 mph touched down in the Lincolnwood neighborhood of Chicago near the intersection of Lunt and Hamlin Avenues.  Tree damage occurred along most of the path of the tornado.  At least two city blocks were impassable due to fallen trees.  Numerous cars were totaled after trees fell on them.  Utility poles were leaning along Touhy Avenue, just east of St. Louis Avenue.  Significant tree damage including snapped trees, large trees uprooted and trees and tree limbs on vehicles, occurred between California Avenue and Rogers Phillip Park.  The most intense damage occurred approximately one mile west of Lake Michigan where widespread tree damage occurred including large trees 1 to 2 feet in diameter snapped and uprooted.  Minor roof damage also occurred in this area.  The tornado continued east to the Lake Michigan shore where it became a waterspout as it moved east of Fargo Beach Park.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 10-AUG-20 14:18:00 to 10-AUG-20 14:18:00 (CST-6)
Location: VERONA
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several metal panels of a large shed were blown in on one side and blown out on another side.

Thunderstorm Wind in OGLE, ILLINOIS
From 10-AUG-20 13:40:00 to 10-AUG-20 13:40:00 (CST-6)
Location: KINGS
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A large tree limb was blown down.

Thunderstorm Wind in LIVINGSTON, ILLINOIS
From 10-AUG-20 14:30:00 to 10-AUG-20 14:30:00 (CST-6)
Location: FORREST
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Tree damage was reported in Forrest.

Thunderstorm Wind in WILL, ILLINOIS
From 10-AUG-20 14:41:00 to 10-AUG-20 14:41:00 (CST-6)
Location: LOCKPORT LEWIS ARPT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

A wind gust to 58 mph was measured at the National Weather Service office in Romeoville.  Small tree limbs were observed flying past the window at the time of the peak gust.

Thunderstorm Wind in LAKE, ILLINOIS
From 10-AUG-20 14:49:00 to 10-AUG-20 14:49:00 (CST-6)
Location: HALFDAY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Milwaukee Avenue was closed between Route 22 and Old Half Day Road due do a power line blown down.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 10-AUG-20 14:21:00 to 10-AUG-20 14:21:00 (CST-6)
Location: MAZON
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

One grain bin was destroyed and a second grain bin was damaged.  Nearby corn fields had partial damage with stalks blown down near Mazon.

Tornado in WILL, ILLINOIS
From 10-AUG-20 14:26:00 to 10-AUG-20 14:30:00 (CST-6)
Location: CATON FARM
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down in central Kendall County and moved southeast crossing into Will County just south of Renwick Road.  Tree damage occurred along the path in Will County including a tree blown down near Caton Farm and Drauden Road.  Minor roof damage occurred with some shingles blown off and some fences were blown down.  One house lost half of the shingles on its roof with vents torn off, just east of Route 59.  The tornado lifted near Caton Farm Road, just west of Interstate 55.

Thunderstorm Wind in DE KALB, ILLINOIS
From 10-AUG-20 14:05:00 to 10-AUG-20 14:06:00 (CST-6)
Location: SANDWICH
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Tree limbs and power lines were blown down in Sandwich.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 15:00:00 to 10-AUG-20 15:01:00 (CST-6)
Location: MATTESON
Magnitude: 75.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees, tree limbs and power lines were blown down in Park Forest.  Multiple vehicles were damaged by fallen trees.  Several homes had roof or siding damage.  Part of a brick wall collapsed off a house.  Widespread tree damage occurred in forest preserve areas near Park Forest.

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 10-AUG-20 14:50:00 to 10-AUG-20 14:53:00 (CST-6)
Location: WEST KANKAKEE
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Numerous trees were blown down and uprooted in Kankakee.  Tree limbs and power lines were also blown down.  Many trees fell onto roofs and garages causing damage.  The hardest hit areas were on the west side of Kankakee and the Riverview neighborhood where streets were blocked by the fallen trees.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:57:00 to 10-AUG-20 14:58:00 (CST-6)
Location: ALBANY PARK
Magnitude: 83.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A corridor of significant wind damage occurred in Chicago, starting immediately east of Interstate 90/94 near Berteau and Kildare Avenues and continued northeast to near Montrose and Lawndale Avenues.  Significant tree damage occurred in this corridor with many trees snapped or uprooted.  Roof damage occurred to a few apartment buildings along Kedvale Avenue, just south of Cullom Avenue.  One building suffered damage to a brick wall.  Damage occurred to the top of a brick business at the southeast corner of Pulaski Road and Elston Avenue.  Vehicles were damaged by the falling bricks.  Several roofs sustained damage northeast of Elston Avenue, just south of Montrose Avenue and a window was blown out of a house.  Two utility poles were damaged near Avers Avenue.  Three buildings along Montrose Avenue suffered significant roof damage just east of Hamlin Avenue.  Two buildings had west and south facing windows blown out near Montrose Avenue and Lawndale Avenue.  The damage in this corridor indicates peak winds of 95 mph.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 10-AUG-20 14:19:00 to 10-AUG-20 14:19:00 (CST-6)
Location: MAZON
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Minor roof damage occurred to a house along Burkhart Road.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 10-AUG-20 13:43:00 to 10-AUG-20 13:43:00 (CST-6)
Location: (VYS) ILLINOIS VALLEY REGIONAL AIRPORT
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A semi truck was blown over on Route 251, north of Peru.  The driver was injured.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:55:00 to 10-AUG-20 14:55:00 (CST-6)
Location: (MDW) CHICAGO MIDWAY AIRPORT
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A wind gust to 72 mph was measured at Midway Airport.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:39:00 to 10-AUG-20 14:39:00 (CST-6)
Location: SCHAUMBURG
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated between 60 mph and 70 mph in Schaumburg.

Thunderstorm Wind in KANE, ILLINOIS
From 10-AUG-20 14:30:00 to 10-AUG-20 14:31:00 (CST-6)
Location: CARPENTERSVILLE
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Several whole trees were uprooted in Carpentersville along with numerous healthy 6 inch diameter tree limbs blown down.  Fire crews responded to 14 reports of power lines blown down.  One of these power lines started a fire in a detached garage on Golfview Lane.  A tree fell onto a roof of a house on Wakefield Drive, leaving the house uninhabitable.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 10-AUG-20 14:26:00 to 10-AUG-20 14:26:00 (CST-6)
Location: EAST BROOKLYN
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A pontoon boat was flipped over near Gardener.

Thunderstorm Wind in WILL, ILLINOIS
From 10-AUG-20 14:41:00 to 10-AUG-20 14:41:00 (CST-6)
Location: FOREST PARK
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

A large and old brick and concrete structure that held a movie screen at an outdoor drive-in movie theater was destroyed with about 80 percent of the structure collapsed.  Most of the debris fell in place and crushed a semi trailer that had been parked near the structure.

Thunderstorm Wind in KENDALL, ILLINOIS
From 10-AUG-20 14:11:00 to 10-AUG-20 14:12:00 (CST-6)
Location: PLANO
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Tree limbs and power lines were blown down in Plano.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 10-AUG-20 13:52:00 to 10-AUG-20 13:54:00 (CST-6)
Location: UTICA
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees were blown down in Starved Rock State Park, blocking roads and trails.

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 10-AUG-20 14:52:00 to 10-AUG-20 14:52:00 (CST-6)
Location: KANKAKEE GTR ARPT
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

A semi truck was blown over in the Kankakee Walmart parking lot.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:57:00 to 10-AUG-20 14:57:00 (CST-6)
Location: EDGEWATER
Magnitude: 74.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust to 85 mph was measured.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 10-AUG-20 14:19:00 to 10-AUG-20 14:19:00 (CST-6)
Location: MAZON
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large trees were snapped and numerous tree limbs were blown down near Gardener and Dwight Roads.

Hail in WINNEBAGO, ILLINOIS
From 10-AUG-20 13:53:00 to 10-AUG-20 13:54:00 (CST-6)
Location: SAMUELSON CORNERS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in WILL, ILLINOIS
From 10-AUG-20 15:00:00 to 10-AUG-20 15:01:00 (CST-6)
Location: STEGER
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Widespread wind damage was reported throughout Steger including trees blown down, trees on power lines and broken utility poles.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 15:02:00 to 10-AUG-20 15:04:00 (CST-6)
Location: SKOKIE
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous trees were snapped and uprooted in Evanston.

Thunderstorm Wind in LAKE, ILLINOIS
From 10-AUG-20 14:39:00 to 10-AUG-20 14:39:00 (CST-6)
Location: DEER PARK
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees and power lines were blown down on Ela Road north of Lake Cook Road.

Thunderstorm Wind in DE KALB, ILLINOIS
From 10-AUG-20 14:02:00 to 10-AUG-20 14:02:00 (CST-6)
Location: SANDWICH
Magnitude: 78.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Seven large and new utility poles were snapped about 10 feet up from their base along Somonauk Road, just south of Chicago Road.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:36:00 to 10-AUG-20 14:36:00 (CST-6)
Location: HANOVER PARK
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A B-Class truck with a trailer was blown over at Irving Park Road and Schaumburg Road.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 10-AUG-20 13:57:00 to 10-AUG-20 13:58:00 (CST-6)
Location: LELAND
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Tree limbs and power lines were blown down in Leland.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 10-AUG-20 14:43:00 to 10-AUG-20 14:44:00 (CST-6)
Location: ELMHURST
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Tree limbs and power lines were blown down in Elmhurst.

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 10-AUG-20 15:00:00 to 10-AUG-20 15:00:00 (CST-6)
Location: ST ANNE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tree damage was reported along E 7500S Road.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:59:00 to 10-AUG-20 14:59:00 (CST-6)
Location: ALBANY PARK
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Large tree limbs fell onto a small car near Catalpa Avenue and Spaulding Avenue, trapping the occupants in the car.  Firefighters had to cut the tree limbs away before the people could exit the car.  No injuries were reported.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 10-AUG-20 14:19:00 to 10-AUG-20 14:19:00 (CST-6)
Location: MAZON
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A utility pole was snapped.

Hail in BOONE, ILLINOIS
From 10-AUG-20 14:00:00 to 10-AUG-20 14:01:00 (CST-6)
Location: BELVIDERE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in IROQUOIS, ILLINOIS
From 10-AUG-20 14:51:00 to 10-AUG-20 14:51:00 (CST-6)
Location: DANFORTH
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A semi truck was overturned on Interstate 57 near mile marker 287.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 10-AUG-20 14:40:00 to 10-AUG-20 14:40:00 (CST-6)
Location: WILLOWBROOK
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Considerable tree damage was reported along Main Street, north of 75th Street.

Thunderstorm Wind in LAKE, ILLINOIS
From 10-AUG-20 14:40:00 to 10-AUG-20 14:40:00 (CST-6)
Location: VOLO
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Tree limbs 8 to 10 inches in diameter were blown down near Sullivan Lake Boulevard and Game Trail.  Some of the tree limbs were 20 feet in length.  Siding was blown off of an apartment building.

Thunderstorm Wind in DE KALB, ILLINOIS
From 10-AUG-20 14:02:00 to 10-AUG-20 14:02:00 (CST-6)
Location: SOMONAUK
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Several trees were blown down, a grain bin was damaged and the roof of a shed was blown off.

Thunderstorm Wind in KENDALL, ILLINOIS
From 10-AUG-20 14:26:00 to 10-AUG-20 14:26:00 (CST-6)
Location: OSWEGO
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Damage to siding of a house was reported along with small tree limbs blown down nearby.

Thunderstorm Wind in DE KALB, ILLINOIS
From 10-AUG-20 13:55:00 to 10-AUG-20 13:56:00 (CST-6)
Location: SHABBONA
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Tree limbs and power lines were blown down in Shabbona.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 10-AUG-20 14:43:00 to 10-AUG-20 14:45:00 (CST-6)
Location: WESTMONT
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Large tree limbs were blown down in Clarendon Hills and Hinsdale.  The worst of the damage was north of the railroad tracks in Clarendon Hills where roads were blocked.  The worst damage in Hinsdale appeared to be in the northeast part of the village.

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 10-AUG-20 14:50:00 to 10-AUG-20 14:51:00 (CST-6)
Location: ALTORF
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Several trees and power lines were blown down in Bourbonnais.  At least two homes were damaged by trees falling through the roof.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:51:00 to 10-AUG-20 14:52:00 (CST-6)
Location: HOLLYWOOD
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Scattered tree limbs were blown down across Riverside.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 10-AUG-20 14:20:00 to 10-AUG-20 14:20:00 (CST-6)
Location: MAZON
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large tree limbs were blown down.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 10-AUG-20 14:02:00 to 10-AUG-20 14:04:00 (CST-6)
Location: STREATOR WEST
Magnitude: 74.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees, tree limbs and power lines were blown down in Streator.  Some trees were uprooted, including at City Park.  Many roads were blocked by fallen trees.  A tree fell onto three cars near 7th Street, crushing two of the cars.  Part of the roof of the YMCA was blown off and nearby, a metal roof was partially blown off of a drive-in restaurant.  Numerous utility poles were damaged and much of the city lost power.

Tornado in WINNEBAGO, ILLINOIS
From 10-AUG-20 13:37:00 to 10-AUG-20 13:38:00 (CST-6)
Location: RCKFRD COTTONWOOD AR
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A brief tornado with peak winds of 75 mph touched down near the intersection of Pierpont Avenue and Montague Road and continued northeast into the southwest side of Rockford.  The tornado ended near the intersection of Ferguson and Loomis Streets.  All of the damage was to trees along the tornado path.

Thunderstorm Wind in WILL, ILLINOIS
From 10-AUG-20 14:37:00 to 10-AUG-20 14:41:00 (CST-6)
Location: RAYNOR PARK
Magnitude: 74.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Local Official

Widespread tree damage occurred in Crest Hill with the east side of town hit the hardest.  Numerous large tree limbs were blown down along with some trees, blocking several roads.  Powerlines were also blown down.  A roof of an apartment building on Arbor Lane was partially blown off, displacing 10 families who lived there.

Thunderstorm Wind in LAKE, ILLINOIS
From 10-AUG-20 14:46:00 to 10-AUG-20 14:46:00 (CST-6)
Location: BUFFALO GROVE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees and power lines were blown down along Route 83 in Buffalo Grove.

Thunderstorm Wind in DE KALB, ILLINOIS
From 10-AUG-20 14:00:00 to 10-AUG-20 14:02:00 (CST-6)
Location: SOMONAUK
Magnitude: 78.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Widespread tree damage occurred in Somonauk with a few trees snapped very near their base and minor damage to houses, consisting mainly of a few shingles blown off.

Funnel Cloud in WILL, ILLINOIS
From 10-AUG-20 14:45:00 to 10-AUG-20 14:45:00 (CST-6)
Location: FAIRMONT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A funnel cloud was observed from Caton Farm Road and Route 53.

Thunderstorm Wind in WILL, ILLINOIS
From 10-AUG-20 14:36:00 to 10-AUG-20 14:40:00 (CST-6)
Location: (JOT) JOLIET DISTRIC
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Scattered tree damage occurred in Joliet with broken tree limbs in several intersections along Jefferson Street.  At least one car was damaged by a large tree in the Cathedral Area in Joliet, where power lines were blown down.  Numerous other tree limbs were blown down.

Tornado in COOK, ILLINOIS
From 10-AUG-20 14:54:00 to 10-AUG-20 14:59:00 (CST-6)
Location: GOESELVILLE
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado with peak winds of 100 mph touched just east of Harlem Avenue in Oak Forest then moved nearly due east along 151st Street producing tree damage and minor structural damage before lifting near the Interstate 57/294 interchange in Midlothian.  Numerous trees were uprooted between Ridgeland Avenue and Cicero Avenue.  The worst damage occurred between Cicero Avenue and Pulaski Road where several large trees and utility poles were snapped at their base.  Tree damage continued east of Pulaski Road with fences blown down before the tornado lifted.

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 10-AUG-20 14:47:00 to 10-AUG-20 14:48:00 (CST-6)
Location: LIMESTONE
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees, tree limbs and power lines were blown down in Limestone.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:52:00 to 10-AUG-20 14:52:00 (CST-6)
Location: DUNNING
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A garage collapsed near Roscoe Street and Nordica Avenue.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 10-AUG-20 14:16:00 to 10-AUG-20 14:17:00 (CST-6)
Location: VERONA
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Pockets of flattened corn stalks were reported northwest of Verona.

Thunderstorm Wind in KANE, ILLINOIS
From 10-AUG-20 14:15:00 to 10-AUG-20 14:15:00 (CST-6)
Location: KANEVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

An 8 inch diameter tree was snapped near Route 47 and Nottingham Drive.

Tornado in WINNEBAGO, ILLINOIS
From 10-AUG-20 13:47:00 to 10-AUG-20 13:59:00 (CST-6)
Location: SAMUELSON CORNERS
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado with peak winds of 100 mph touched down near Guilford Road, east of Alpine Road and traveled approximately 6 miles northeast to Argyle Road where it crossed into Boone County.  Numerous trees, power lines, utility poles and fences were blown down from where the tornado touched down through the Mulford Road and Springbrook Road area.  Significant tree damage occurred in a localized area near Rock Valley College.  Just northeast of Perryville Road, some utility poles were broken along with extensive tree damage and minor roof and siding damage occurred to some homes.  Part of the roof was blown off of a Farm and Fleet building along East Riverside Boulevard, just west of Interstate 90.  A home suffered siding and roof damage and metal wall panels were blown off a building, both along Paulson Road.

Thunderstorm Wind in WILL, ILLINOIS
From 10-AUG-20 14:30:00 to 10-AUG-20 14:38:00 (CST-6)
Location: CRYSTAL LAWNS
Magnitude: 74.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Widespread wind damage occurred across much of northwest Joliet from Caton Farm Road and Interstate 55 southeast through Larkin Avenue and Black Road.  Several hundred trees were damaged with hundreds of tree limbs blown down.  Large tree limbs blocked some roads.  A few pine trees had the top of the tree sheared off.  Power lines were blown down in many areas.  Hundreds of residential fences were damaged with many sections of fencing blown down.  Some homes suffered minor roof damage with primarily some shingles blown off.

Thunderstorm Wind in LAKE, ILLINOIS
From 10-AUG-20 14:45:00 to 10-AUG-20 14:45:00 (CST-6)
Location: GRAYSLAKE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees and power lines were blown down along Route 83 in Grayslake.

Thunderstorm Wind in DE KALB, ILLINOIS
From 10-AUG-20 13:58:00 to 10-AUG-20 14:00:00 (CST-6)
Location: DE KALB
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Multiple trees and power lines were blown down in De Kalb.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:57:00 to 10-AUG-20 14:57:00 (CST-6)
Location: RICHTON PARK
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Three utility poles were leaning near Suak Trail and Governor's Highway.

Tornado in KANKAKEE, ILLINOIS
From 10-AUG-20 15:04:00 to 10-AUG-20 15:06:00 (CST-6)
Location: GRANT PARK
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado with peak winds of 80 mph touched down along N 11000 E Road.  Tree limbs were blown down, a utility pole was damaged and crops were damaged.  The tornado moved southeast through Grant Park.  Numerous trees were damaged including some trees snapped and some trees uprooted.  Minor roof damaged occurred to a house on Park Street and to another house on Maple Street.  The tornado lifted near Lake Metonga.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 15:00:00 to 10-AUG-20 15:10:00 (CST-6)
Location: DIXMOOR
Magnitude: 78.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A corridor of significant straight line wind damage occurred from Harvey east to Calumet City.  Numerous trees were uprooted and snapped along this corridor.  Some roofs were damaged by falling trees; other roofs suffered minor shingle damage from the strong winds.  Some of the worst damage was in Harvey in an area between Sibley Boulevard to the north and 159th Street to the south.  Trees were snapped and uprooted and extensive damage occurred to utility poles and power lines, resulting in some portions of the power grid needing to be completely rebuilt.  Almost everyone in Harvey lost power.  An estimated 300 to 350 trees were blown down in Harvey.  Almost every road in Harvey was blocked by some amount of tree damage.  Significant tree damage was reported in forest preserve areas including in the Shabonna Woods Forest Preserve.  Damage was consistent with wind speeds up to 90 mph.
One day later, on August 11th, just after noon, a 59 year old man was walking in the 15000 block of Merrill Avenue in unincorporated Thornton Township near Calumet City.  He stepped on a downed power line that was live and collapsed in a grassy area where he died.

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 10-AUG-20 14:56:00 to 10-AUG-20 14:57:00 (CST-6)
Location: AROMA PARK
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees, tree limbs and power lines were blown down in Aroma Park.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:52:00 to 10-AUG-20 14:53:00 (CST-6)
Location: OAK PARK
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Numerous tree limbs were blown down in Oak Park.  More than a dozen streets were blocked by the fallen tree limbs.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 10-AUG-20 14:35:00 to 10-AUG-20 14:35:00 (CST-6)
Location: MORRIS MUNI ARPT
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

A wind gust to 59 mph was measured at the Morris Municipal Airport.

Hail in GRUNDY, ILLINOIS
From 10-AUG-20 14:27:00 to 10-AUG-20 14:28:00 (CST-6)
Location: MORRIS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in BOONE, ILLINOIS
From 10-AUG-20 13:59:00 to 10-AUG-20 14:05:00 (CST-6)
Location: CALEDONIA
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down in southeast Winnebago County and moved northeast crossing into Boone County along Argyle Road.  This tornado produced mainly tree damage in Boone County including tree limbs blown down in Caledonia.  The tornado ended on the east side of Caledonia, south of Route 173.

Thunderstorm Wind in WILL, ILLINOIS
From 10-AUG-20 14:37:00 to 10-AUG-20 14:37:00 (CST-6)
Location: IDYLSIDE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Sporadic tree limbs 6 to 12 inches in diameter were blown down along McDonough Street.

Thunderstorm Wind in LAKE, ILLINOIS
From 10-AUG-20 14:36:00 to 10-AUG-20 14:36:00 (CST-6)
Location: BARRINGTON
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees and power lines were blown down on Cuba Road east of Route 14.

Tornado in DU PAGE, ILLINOIS
From 10-AUG-20 14:39:00 to 10-AUG-20 14:42:00 (CST-6)
Location: LOMBARD
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado with peak winds of 95 mph touched down near Main and Maple Streets, just east of Lilacia Park.  The tornado moved northeast uprooting some trees and snapping other trees.  More than 200 homes in Lombard suffered some amount of damage, a few suffered significant roof damage.  The worst damage occurred near the Lombard Common just south of St. Charles Road.  Tree damage continued along the path including part of a large tree blown down near Schafer Elementary School.  A one foot diameter tree was blown down onto a house.  Another house suffered minor roof and siding damage just north of the Jefferson Middle School and the tornado lifted northeast of the Jefferson Middle School.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 15:00:00 to 10-AUG-20 15:00:00 (CST-6)
Location: PARK FOREST
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A private weather station measured a wind gust to 72 mph on Fir Street.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 10-AUG-20 13:42:00 to 10-AUG-20 13:43:00 (CST-6)
Location: (VYS) ILLINOIS VALLEY REGIONAL AIRPORT
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Wind gusts at the Illinois Valley Regional Airport reached 70 mph and then the power went out.  A worker at the airport described winds as much higher than that after the power went off.

Thunderstorm Wind in WILL, ILLINOIS
From 10-AUG-20 14:42:00 to 10-AUG-20 14:43:00 (CST-6)
Location: LOCKPORT
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Tree limbs and power lines were blown down in Lockport.

Thunderstorm Wind in IROQUOIS, ILLINOIS
From 10-AUG-20 15:06:00 to 10-AUG-20 15:09:00 (CST-6)
Location: WATSEKA
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees, tree limbs and power lines were blown down across many areas in Iroquois County including in Watseka, where some of the worst damage was in Peters Park and Hubbard Park.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 15:00:00 to 10-AUG-20 15:00:00 (CST-6)
Location: LAKEVIEW
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Roofing material was peeled off a roof just north of Waveland Avenue and just west of Lake Shore Drive with debris blown across Lake Shore Drive.

Thunderstorm Wind in DE KALB, ILLINOIS
From 10-AUG-20 13:53:00 to 10-AUG-20 13:53:00 (CST-6)
Location: SHABBONA
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated between 70 mph and 80 mph in Lee.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 10-AUG-20 14:27:00 to 10-AUG-20 14:27:00 (CST-6)
Location: WAYNE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

A tree was blown down near Nancy Lane and Powis Road.

Hail in DU PAGE, ILLINOIS
From 10-AUG-20 14:43:00 to 10-AUG-20 14:44:00 (CST-6)
Location: BUTTERFIELD WEST
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter size hail was reported near Route 53 and Roosevelt Road.

Thunderstorm Wind in KANE, ILLINOIS
From 10-AUG-20 14:16:00 to 10-AUG-20 14:16:00 (CST-6)
Location: AURORA MUNI ARPT
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree damage was reported blocking Fays Lane west of Sugar Grove.

Tornado in DE KALB, ILLINOIS
From 10-AUG-20 13:50:00 to 10-AUG-20 13:57:00 (CST-6)
Location: FAIRDALE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado with peak winds of 80 mph touched down just southeast of Fairdale and moved northeast until it ended in a field east of Myelle Road.  Drone footage showed a narrow swath of corn flattened in a convergent pattern.  A utility pole was snapped along Buck Road.  Tree damage occurred at a vocational farm along Pearl Street, just north of Wolf Road and a plastic covering was ripped off a greenhouse.  The path of this tornado was determined, in part, using high resolution satellite imagery.

Thunderstorm Wind in WILL, ILLINOIS
From 10-AUG-20 14:50:00 to 10-AUG-20 14:51:00 (CST-6)
Location: FRANKFORT
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees, tree limbs and power lines were blown down in Frankfort.  Some utility poles were damaged.

Tornado in COOK, ILLINOIS
From 10-AUG-20 14:57:00 to 10-AUG-20 14:59:00 (CST-6)
Location: PARK FOREST SOUTH
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado with peak winds of 85 mph touched down near the Will Cook County line, just west of Shabbona Drive.  This tornado produced mainly tree damage along its path.  The worst of the damage was confined to a small area near Marquette and Somonauk Parks, although very little structural damage was noted in this area.  The tornado lifted over Schubert's Woods Forest Preserve.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 10-AUG-20 13:44:00 to 10-AUG-20 13:45:00 (CST-6)
Location: OGLESBY
Magnitude: 74.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees, tree limbs and power lines were blown down in Oglesby.  A number of trees were uprooted in Memorial Park.  Several roads were blocked by fallen trees.  Most of the city lost power.

Thunderstorm Wind in WILL, ILLINOIS
From 10-AUG-20 14:39:00 to 10-AUG-20 14:40:00 (CST-6)
Location: ROMEOVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Tree limbs and power lines were blown down in Romeoville.

Thunderstorm Wind in IROQUOIS, ILLINOIS
From 10-AUG-20 15:00:00 to 10-AUG-20 15:01:00 (CST-6)
Location: CRESCENT CITY
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large trees and utility poles were blown down.  A billboard was also damaged.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 15:00:00 to 10-AUG-20 15:00:00 (CST-6)
Location: EDGEWATER
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A tree was blown down blocking the exit from Lake Shore Drive to Wilson Drive.

Thunderstorm Wind in OGLE, ILLINOIS
From 10-AUG-20 13:48:00 to 10-AUG-20 13:48:00 (CST-6)
Location: CRESTON
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large tree limbs were blown down.

Thunderstorm Wind in WILL, ILLINOIS
From 10-AUG-20 14:32:00 to 10-AUG-20 14:32:00 (CST-6)
Location: WALKER
Magnitude: 73.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust to 84 mph was measured.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:49:00 to 10-AUG-20 14:49:00 (CST-6)
Location: (ORD) CHICAGO O'HARE AIRPORT
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A wind gust was measured to 62 mph at Chicago O'Hare Airport.

Thunderstorm Wind in OGLE, ILLINOIS
From 10-AUG-20 13:15:00 to 10-AUG-20 13:20:00 (CST-6)
Location: FORRESTON
Magnitude: 87.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Straight line winds gusting to 100 mph hit the town of Forreston producing widespread tree and power line damage.  Tree and power line damage occurred across 48 blocks of the village and structural damage occurred across 13 blocks.  Several mobile homes were damaged or destroyed in two mobile home parks and five people were injured.  At least 50 people were displaced.  Significant damage occurred to a large metal building near a gas station with associated debris blown toward the northeast.  The gas station had its heating and cooling unit ripped off the roof, leaving a hole in the roof.  A cinder block wall was blown out of the east side of a building causing minor damage to a parked semi truck.  A garage partially collapsed from a fallen tree.  Several other roofs suffered some damage from falling tree limbs.  A car was damaged by a falling tree limb.

Thunderstorm Wind in DE KALB, ILLINOIS
From 10-AUG-20 13:53:00 to 10-AUG-20 13:53:00 (CST-6)
Location: KIRKLAND
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Power lines were blown down in Kirkland.

Thunderstorm Wind in IROQUOIS, ILLINOIS
From 10-AUG-20 15:03:00 to 10-AUG-20 15:03:00 (CST-6)
Location: PAPINEAU
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A private weather station measured a wind gust to 66 mph.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:59:00 to 10-AUG-20 15:01:00 (CST-6)
Location: SOUTH CHICAGO HEIGHTS
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Sporadic straight line wind damage occurred across South Chicago Heights and continued east to State Street.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 10-AUG-20 13:42:00 to 10-AUG-20 13:44:00 (CST-6)
Location: PERU
Magnitude: 74.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees, tree limbs and power lines were blown down in Peru and La Salle.  Some roads were blocked by fallen trees.

Thunderstorm Wind in WILL, ILLINOIS
From 10-AUG-20 14:46:00 to 10-AUG-20 14:47:00 (CST-6)
Location: HOMER GLEN
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Tree limbs and power lines were blown down in Homer Glen.

Thunderstorm Wind in MCHENRY, ILLINOIS
From 10-AUG-20 14:31:00 to 10-AUG-20 14:32:00 (CST-6)
Location: SPRING GROVE
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees and tree limbs were blown down in Spring Grove.  Several healthy trees were snapped near their base.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:57:00 to 10-AUG-20 14:58:00 (CST-6)
Location: AVONDALE
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

About 50 trees were knocked down or damaged along Logan Boulevard in the Logan Square neighborhood in Chicago.  Tree limbs and power lines were also blown down.

Thunderstorm Wind in KENDALL, ILLINOIS
From 10-AUG-20 14:14:00 to 10-AUG-20 14:14:00 (CST-6)
Location: FOX
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A private weather station measured a wind gust to 65 mph.

Hail in GRUNDY, ILLINOIS
From 10-AUG-20 14:29:00 to 10-AUG-20 14:31:00 (CST-6)
Location: MORRIS
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Golf ball size hail was reported near Interstate 80 and Lisbon Road.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 15:08:00 to 10-AUG-20 15:08:00 (CST-6)
Location: THORNTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated to 60 mph in Thornton.

Tornado in LAKE, ILLINOIS
From 10-AUG-20 14:41:00 to 10-AUG-20 14:45:00 (CST-6)
Location: CHANNEL LAKE
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado with peak winds of 90 mph touched down south of Route 173 and moved northeast to the state line where it crossed into Kenosha County in southeast Wisconsin.  Mainly tree damage occurred along the path in Lake County with several trees uprooted with some minor structural damage just south of the state line.

Tornado in MCHENRY, ILLINOIS
From 10-AUG-20 14:05:00 to 10-AUG-20 14:11:00 (CST-6)
Location: CORAL
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado with peak winds of 95 mph touched down just south of Harmony Road, west of Payne Road where several large tree limbs were blown down.  Tree damage occurred immediately northeast of Interstate 90.  Farm sheds were heavily damaged near Anthony and Riley Roads.  Tree limbs were blown down and corn was blown down in a convergent pattern in this area.  Two utility poles were slightly leaning along Route 23, south of Grange Road.  A single family home was heavily damaged near Maple Street.  Mainly tree limbs were blown down along the remaining path.  The tornado lifted near Coral and Dunham Roads.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:50:00 to 10-AUG-20 14:50:00 (CST-6)
Location: BROADVIEW
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

A narrow corridor of wind damage occurred along 23rd Street in North Riverside.  One large tree fell between two houses near 10th Avenue causing some damage to aluminum siding.  Another large tree near 2nd Avenue was completely uprooted, narrowly missing a house.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:55:00 to 10-AUG-20 14:55:00 (CST-6)
Location: BURBANK
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A wind gust to 65 mph was measured in Burbank.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 10-AUG-20 13:43:00 to 10-AUG-20 13:44:00 (CST-6)
Location: OGLESBY
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Two semi trucks were blown over west of Oglesby.  One was blown over on the southbound exit from Interstate 39 and the second was blown over just north of the entrance to a warehouse on Mallick Road.

Thunderstorm Wind in WILL, ILLINOIS
From 10-AUG-20 14:31:00 to 10-AUG-20 14:32:00 (CST-6)
Location: PLAINFIELD
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large trees and power lines were blown down across Plainfield.

Thunderstorm Wind in KENDALL, ILLINOIS
From 10-AUG-20 14:14:00 to 10-AUG-20 14:16:00 (CST-6)
Location: YORKVILLE
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees, tree limbs and power lines were blown down in Yorkville.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 15:02:00 to 10-AUG-20 15:02:00 (CST-6)
Location: EDGEWATER
Magnitude: 70.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts to 80 mph were measured at the Montrose Harbor Light.

Thunderstorm Wind in KANE, ILLINOIS
From 10-AUG-20 14:09:00 to 10-AUG-20 14:11:00 (CST-6)
Location: MAPLE PARK
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Multiple trees were blown down, some 20 inches in diameter.  Power lines and fences were also blown down.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 10-AUG-20 14:33:00 to 10-AUG-20 14:35:00 (CST-6)
Location: WARRENVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree limbs up to 6 inches in diameter were blown down all over Warrenville.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:55:00 to 10-AUG-20 14:55:00 (CST-6)
Location: BERWYN
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tree damage was reported in Cicero.

Thunderstorm Wind in LAKE, ILLINOIS
From 10-AUG-20 14:42:00 to 10-AUG-20 14:43:00 (CST-6)
Location: GRASS LAKE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

A 1 to 2 foot diameter tree was snapped a few feet above the ground near Woodside Avenue.  Trees and power lines were blown down on Grass Lake Road, east of Route 59.

Tornado in DU PAGE, ILLINOIS
From 10-AUG-20 14:35:00 to 10-AUG-20 14:36:00 (CST-6)
Location: WHEATON
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A brief tornado with peak winds of 90 mph touched down near Seminary Avenue and Scott Street and moved northeast where it knocked a roughly 50 foot steeple around to the north side of the College Church of Wheaton.  The tornado then produced minor tree damage before lifting near Collage Avenue and Howard Street.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:51:00 to 10-AUG-20 14:52:00 (CST-6)
Location: CONGRESS PARK
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Tree damage occurred in Brookfield with the worst of the damage north of the railroad tracks.  A corridor of widespread damage occurred along Grant Avenue where large tree limbs were blocking streets and sidewalks.  A few larger tree limbs fell onto parked cars.  A tree was split down the middle near Cleveland Avenue with part of the tree landing on the roof of a brick bungalow.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 15:02:00 to 10-AUG-20 15:02:00 (CST-6)
Location: CHICAGO HEIGHTS
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A 45 foot tall Pine tree was blown down in Chicago Heights.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 10-AUG-20 13:57:00 to 10-AUG-20 14:00:00 (CST-6)
Location: OTTAWA
Magnitude: 74.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees, tree limbs and power lines were blown down in Ottawa.  A shed was destroyed.  Multiple signs in downtown Ottawa were blown down.

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 10-AUG-20 14:36:00 to 10-AUG-20 14:37:00 (CST-6)
Location: HERSCHER
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees, tree limbs and power lines were blown down in Herscher.  Almost everyone lost power.

Thunderstorm Wind in OGLE, ILLINOIS
From 10-AUG-20 13:37:00 to 10-AUG-20 13:40:00 (CST-6)
Location: FLAGG CENTER
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree and power line damage occurred across many areas in Ogle County, from Forreston to rural Rochelle.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:51:00 to 10-AUG-20 14:53:00 (CST-6)
Location: RIVER GROVE
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees, tree limbs and power lines were blown down in River Grove and Elmwood Park.  Several cars and houses were damaged by fallen trees.  Several roads were blocked by the fallen trees.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 10-AUG-20 14:15:00 to 10-AUG-20 14:15:00 (CST-6)
Location: VERONA
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A barn had two large doors blown out along Gonnam Road.

Thunderstorm Wind in KANE, ILLINOIS
From 10-AUG-20 14:16:00 to 10-AUG-20 14:16:00 (CST-6)
Location: AURORA MUNI ARPT
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A wind gust was measured to 62 mph at the Aurora Municipal Airport.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 10-AUG-20 13:40:00 to 10-AUG-20 13:41:00 (CST-6)
Location: CEDAR PT
Magnitude: 79.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A wind gust to 91 mph was measured.  Roof damage was reported to homes; traffic signs were snapped; power lines were blown down and tree damage was reported.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 10-AUG-20 13:56:00 to 10-AUG-20 13:56:00 (CST-6)
Location: UTICA
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Damage to roofs and outside structures was reported in Utica.

Thunderstorm Wind in MCHENRY, ILLINOIS
From 10-AUG-20 14:29:00 to 10-AUG-20 14:29:00 (CST-6)
Location: CRYSTAL LAKE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

A large tree limb was blown down blocking Ellsworth Street.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 10-AUG-20 13:46:00 to 10-AUG-20 13:46:00 (CST-6)
Location: MENDOTA
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree was blown down and a tree limb was impaled into the side of a manufactured home.  Windows were also blown out of this home.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 10-AUG-20 14:59:00 to 10-AUG-20 14:59:00 (CST-6)
Location: (DPA)DUPAGE CO ARPT
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A wind gust to 60 mph was measured at the DuPage Airport.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:48:00 to 10-AUG-20 14:49:00 (CST-6)
Location: HILLSIDE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Tree limbs and power lines were blown down in Westchester.  At least one tree was struck by lightning.

Thunderstorm Wind in KANE, ILLINOIS
From 10-AUG-20 14:22:00 to 10-AUG-20 14:23:00 (CST-6)
Location: BATAVIA
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Multiple trees and power lines were blown down throughout Batavia.

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 10-AUG-20 14:38:00 to 10-AUG-20 14:39:00 (CST-6)
Location: BONFIELD
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees, tree limbs and power lines were blown down in Bonfield.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:53:00 to 10-AUG-20 14:53:00 (CST-6)
Location: HANSON PARK
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tree was blown down blocking a road in Forest Park.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:58:00 to 10-AUG-20 14:58:00 (CST-6)
Location: EDGEWATER
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree was snapped blocking Eastwood Avenue.  Other large tree limbs were blown down nearby.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 10-AUG-20 14:15:00 to 10-AUG-20 14:15:00 (CST-6)
Location: VERONA
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several trees were snapped.

Thunderstorm Wind in KANE, ILLINOIS
From 10-AUG-20 14:15:00 to 10-AUG-20 14:15:00 (CST-6)
Location: MAPLE PARK
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Damage to traffic signals and a 4 inch tree limb blown down was reported at the intersection of Meredith Road and Route 38.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 10-AUG-20 13:45:00 to 10-AUG-20 13:46:00 (CST-6)
Location: MENDOTA
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Wind gusts were estimated to 80 mph.  Several large trees were blown down.  Wind gusts to severe limits were frequent for 30 minutes after they started.

Tornado in LA SALLE, ILLINOIS
From 10-AUG-20 13:59:00 to 10-AUG-20 14:00:00 (CST-6)
Location: OTTAWA
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado with peak winds of 100 mph touched down south of Marquette Street west of La Salle Street.  The tornado impacted several businesses ripping off well anchored roofing material and snapping a utility pole at its base.  The roof of a flooring business was blown off and hit a nearby building.  It was here the tornado reached peak intensity.  The tornado continued east ripping shingles off of roofs of buildings and houses and shredding trees.  One tree was shredded badly near Canal Street and a large tree limb fell onto a new pickup truck causing significant damage.  Fallen trees and tree limbs covered most areas along the path to the Fox River.  The tornado is believed to have lifted in an inaccessible forested area east of the Fox River.  Eye witnesses indicated the tornado may have had multiple vortices with clear rising and rotating motion of debris.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:50:00 to 10-AUG-20 14:50:00 (CST-6)
Location: ROSEMONT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

A light pole was blown down along southbound River Road near Interstate 190.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 10-AUG-20 14:36:00 to 10-AUG-20 14:38:00 (CST-6)
Location: GLEN ELLYN
Magnitude: 78.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A corridor of enhanced straight line winds developed near President Street in northeast Wheaton and continued across northern Glenn Ellyn, ending northeast of Lake Ellyn.  Trees and utility poles were damaged along this corridor with the peak of the damage occurring east of Main Street and towards Lake Ellyn Park.  Damage was consistent with wind speeds up to 90 mph.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:57:00 to 10-AUG-20 14:57:00 (CST-6)
Location: OAK LAWN
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A large tree was uprooted in Oak Lawn.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:50:00 to 10-AUG-20 14:51:00 (CST-6)
Location: ORLAND PARK
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Tree limbs and power lines were blown down in Orland Park.  A fence was damaged in the Catalina subdivision.

Thunderstorm Wind in KANE, ILLINOIS
From 10-AUG-20 14:19:00 to 10-AUG-20 14:21:00 (CST-6)
Location: LOVEDALE
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees, tree limbs and power lines were blown down in Aurora.  Several roads were blocked by fallen trees.

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 10-AUG-20 15:01:00 to 10-AUG-20 15:02:00 (CST-6)
Location: MOMENCE
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees, tree limbs and power lines were blown down in Momence.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:55:00 to 10-AUG-20 14:55:00 (CST-6)
Location: KIMBERLY HGTS
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Extensive damage occurred to several Maple trees near the First Baptist Church along 179th Street in Tinley Park.  Several shingles were blown off the roof of the church.  Some of the shingles were found more than two blocks away.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:50:00 to 10-AUG-20 15:05:00 (CST-6)
Location: CHICAGO
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Widespread tree damage occurred across Chicago.  At least 11,000 trees were blown down.  Many more trees were damaged.  Dozens of vehicles were damaged by falling trees and tree limbs, some vehicles were crushed.  Numerous roads were blocked by the fallen trees.  Hundreds of power lines were blown down, some started small fires.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 10-AUG-20 14:16:00 to 10-AUG-20 14:16:00 (CST-6)
Location: VERONA
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A grain bin was blown down near State Street in Verona.  Several large tree limbs were also blown down.

Thunderstorm Wind in LEE, ILLINOIS
From 10-AUG-20 13:39:00 to 10-AUG-20 13:39:00 (CST-6)
Location: DIXON
Magnitude: 80.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A private weather station measured a wind gust to 92 mph.  Winds gusted above 50 mph for 20 to 30 minutes.

Thunderstorm Wind in WILL, ILLINOIS
From 10-AUG-20 14:48:00 to 10-AUG-20 14:48:00 (CST-6)
Location: MOKENA
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts to 65 mph were measured with small tree limbs blown down.

Tornado in KANE, ILLINOIS
From 10-AUG-20 14:12:00 to 10-AUG-20 14:14:00 (CST-6)
Location: MAPLE PARK
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tornado with peak winds of 90 mph touched down just west of Thatcher Road, northeast of Maple Park and ended near Meredith Road.  Drone footage revealed a narrow swath of corn flattened in a convergent pattern.  Damage to a barn occurred with a near complete removal of the gabled roof.  The path of this tornado was determined, in part, using high resolution satellite imagery.

Thunderstorm Wind in KANE, ILLINOIS
From 10-AUG-20 14:15:00 to 10-AUG-20 14:15:00 (CST-6)
Location: ELBURN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

A football field goal post was blown over at Kaneland High School.

Thunderstorm Wind in WILL, ILLINOIS
From 10-AUG-20 14:38:00 to 10-AUG-20 14:39:00 (CST-6)
Location: PLAINFIELD CLOW ARPT
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large tree limbs and small trees were blown down in Bolingbrook.

Thunderstorm Wind in WILL, ILLINOIS
From 10-AUG-20 14:44:00 to 10-AUG-20 14:46:00 (CST-6)
Location: NEW LENOX GEAR ARPT
Magnitude: 78.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Significant wind damage occurred in New Lenox with many trees uprooted and many roads blocked by fallen trees.  Hundreds of trees were uprooted or snapped along Cedar Road and Joliet Highway.

Thunderstorm Wind in COOK, ILLINOIS
From 10-AUG-20 14:52:00 to 10-AUG-20 14:53:00 (CST-6)
Location: HANSON PARK
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Multiple trees were damaged in River Forest.  A couple of tree limbs fell onto vehicles.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 10-AUG-20 13:47:00 to 10-AUG-20 13:48:00 (CST-6)
Location: OGLESBY
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees were blown down in Matthiessen State Park.  Three women were injured by falling trees.  One woman was treated at the scene in the Dells Area.  Two women were injured in the River Area.  One suffered head, neck and shoulder injuries but was able to walk back to a parking area to get help.  The second woman was pinned to the ground by a fallen tree and was extricated by first responders.  She was taken to a local hospital.

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 10-AUG-20 14:51:00 to 10-AUG-20 14:53:00 (CST-6)
Location: BOURBONNAIS
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees, tree limbs and power lines were blown down in Bradley.  The hardest hit areas were Blatt and Meadowview subdivisions, west of Kennedy Drive.  A 60 inch diameter tree on Marla Terrace was snapped at its base and fell onto a pickup truck, a garage and another vehicle in the garage.

Thunderstorm Wind in DE KALB, ILLINOIS
From 10-AUG-20 13:59:00 to 10-AUG-20 14:00:00 (CST-6)
Location: HART
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees, tree limbs and power lines were blown down in Genoa.  One tree fell onto a house causing damage.