Scattered thunderstorms moved across portions of northern Illinois during the afternoon and evening of August 24th.

Thunderstorm Wind in OGLE, ILLINOIS
From 24-AUG-21 17:00:00 to 24-AUG-21 17:00:00 (CST-6)
Location: BYRON
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple reports of tree damage were received in the vicinity of Byron.

Hail in COOK, ILLINOIS
From 24-AUG-21 16:20:00 to 24-AUG-21 16:20:00 (CST-6)
Location: ELK GROVE VILLAGE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A photo was shared on social media of quarter size hail.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 24-AUG-21 18:36:00 to 24-AUG-21 18:36:00 (CST-6)
Location: DOWNERS GROVE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Two roughly 6 inch diameter tree limbs were blown down on Maple Avenue.

Thunderstorm Wind in KANE, ILLINOIS
From 24-AUG-21 18:17:00 to 24-AUG-21 18:17:00 (CST-6)
Location: AURORA
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Multiple trees and power lines were blown down.

Thunderstorm Wind in DE KALB, ILLINOIS
From 24-AUG-21 17:43:00 to 24-AUG-21 17:43:00 (CST-6)
Location: GENOA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Power lines were blown down.

Thunderstorm Wind in DE KALB, ILLINOIS
From 24-AUG-21 17:38:00 to 24-AUG-21 17:38:00 (CST-6)
Location: KINGSTON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Numerous tree limbs were blown down.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 24-AUG-21 16:10:00 to 24-AUG-21 16:10:00 (CST-6)
Location: BLOOMINGDALE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Large tree limbs were blown down.

Thunderstorm Wind in OGLE, ILLINOIS
From 24-AUG-21 16:53:00 to 24-AUG-21 16:53:00 (CST-6)
Location: POLO
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tree was blown down onto a house.

Thunderstorm Wind in OGLE, ILLINOIS
From 24-AUG-21 17:04:00 to 24-AUG-21 17:04:00 (CST-6)
Location: STILLMAN VALLEY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Several large tree limbs were snapped.

Thunderstorm Wind in OGLE, ILLINOIS
From 24-AUG-21 17:55:00 to 24-AUG-21 17:55:00 (CST-6)
Location: OREGON
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Multiple 12 to 18 inch diameter tree limbs were blown down in and west of Oregon along Route 64.

Thunderstorm Wind in DE KALB, ILLINOIS
From 24-AUG-21 17:40:00 to 24-AUG-21 17:40:00 (CST-6)
Location: DEKALB
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A photo shared on social media showed a tree snapped near its base near Northern Illinois University.

Thunderstorm Wind in DE KALB, ILLINOIS
From 24-AUG-21 17:40:00 to 24-AUG-21 17:40:00 (CST-6)
Location: DEKALB
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A photo shared on social media showed multiple tree limbs up to 8 inches in diameter blown down near Hillcrest Drive and Blackhawk Road.

Thunderstorm Wind in OGLE, ILLINOIS
From 24-AUG-21 17:20:00 to 24-AUG-21 17:20:00 (CST-6)
Location: ROCHELLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree limbs at least 6 inches in diameter were blown down in southern Rochelle.

Thunderstorm Wind in WINNEBAGO, ILLINOIS
From 24-AUG-21 17:12:00 to 24-AUG-21 17:12:00 (CST-6)
Location: ROCKFORD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Power lines were blown down in the 1300 block of 9th Street.

Flood in COOK, ILLINOIS
From 24-AUG-21 18:22:00 to 24-AUG-21 20:15:00 (CST-6)
Location: RAVENSWOOD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Video shared on social media showed several inches of water at the Irving Park Road underpass at Ravenswood Avenue.

Flood in COOK, ILLINOIS
From 24-AUG-21 18:09:00 to 24-AUG-21 20:15:00 (CST-6)
Location: EDGEWATER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A photo shared on social media showed several inches of standing water on a residential street in Andersonville.

Flash Flood in MCHENRY, ILLINOIS
From 24-AUG-21 17:45:00 to 24-AUG-21 19:45:00 (CST-6)
Location: HARVARD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A car was stalled in floodwaters on McKinley Street.

Flash Flood in COOK, ILLINOIS
From 24-AUG-21 19:20:00 to 24-AUG-21 20:15:00 (CST-6)
Location: EAST GARFIELD PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Cars were stalled in flood waters near Ogden Avenue and Western Avenue.

Flash Flood in COOK, ILLINOIS
From 24-AUG-21 18:30:00 to 24-AUG-21 20:15:00 (CST-6)
Location: GOOSE ISLAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A car was stalled in flood waters at an underpass near Ashland Avenue and Kinzie Street.

Flash Flood in COOK, ILLINOIS
From 24-AUG-21 18:00:00 to 24-AUG-21 20:15:00 (CST-6)
Location: EDGEWATER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Multiple photos and videos shared on social media showed flooding of underpasses along Lake Shore Drive.

Thunderstorm Wind in COOK, ILLINOIS
From 24-AUG-21 17:30:00 to 24-AUG-21 17:30:00 (CST-6)
Location: EDGEWATER
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Large tree limbs were blown down and a tree was uprooted along Ravenswood Avenue.

Thunderstorm Wind in OGLE, ILLINOIS
From 24-AUG-21 17:10:00 to 24-AUG-21 17:10:00 (CST-6)
Location: DAVIS JUNCTION
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A wind gust to 60 mph was measured.

Thunderstorm Wind in OGLE, ILLINOIS
From 24-AUG-21 17:55:00 to 24-AUG-21 17:55:00 (CST-6)
Location: OREGON
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A three foot diameter tree was blown down at the Ogle County Courthouse.

Thunderstorm Wind in OGLE, ILLINOIS
From 24-AUG-21 17:05:00 to 24-AUG-21 17:05:00 (CST-6)
Location: STILLMAN VALLEY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple reports of tree damage were received in the vicinity of Stillman Valley.

Thunderstorm Wind in WINNEBAGO, ILLINOIS
From 24-AUG-21 17:15:00 to 24-AUG-21 17:15:00 (CST-6)
Location: (RFD) ROCKFORD AIRPORT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A four inch diameter tree limb was blown down east of Sandy Hollow Golf Course.

Thunderstorm Wind in DE KALB, ILLINOIS
From 24-AUG-21 17:45:00 to 24-AUG-21 17:45:00 (CST-6)
Location: SYCAMORE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree limbs 2 to 3 inches in diameter were blown down.

Thunderstorm Wind in WINNEBAGO, ILLINOIS
From 24-AUG-21 17:05:00 to 24-AUG-21 17:05:00 (CST-6)
Location: ROCKFORD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A photo shared on social media showed small tree limbs blown down near State Street and Kilburn Avenue.

Thunderstorm Wind in WINNEBAGO, ILLINOIS
From 24-AUG-21 17:08:00 to 24-AUG-21 17:08:00 (CST-6)
Location: ROCKFORD
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees and power lines were blown down on the west side of Rockford.  One tree fell onto a house on Albert Avenue.

Thunderstorm Wind in DE KALB, ILLINOIS
From 24-AUG-21 17:45:00 to 24-AUG-21 17:45:00 (CST-6)
Location: (DKB) DEKALB TAYLOR MUNICIPAL AIRPORT
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A wind gust to 68 mph was measured with a hand held anemometer near the DeKalb Airport.