Thunderstorms developed overnight across Iowa, ahead of a cold front, in an environment characterized by moderate instability and shear. The storms congealed into a line that swept across central Illinois during the early morning hours of August 11, producing scattered damaging winds before weakening after moving east of I-55. The thunderstorms produced locally heavy rainfall over 1 inch, which led to minor flooding in urban areas.

Thunderstorm Wind in LOGAN, ILLINOIS
From 11-AUG-23 07:28:00 to 11-AUG-23 07:33:00 (CST-6)
Location: LINCOLN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Four power poles were blown down along Woodland Road.

Thunderstorm Wind in SANGAMON, ILLINOIS
From 11-AUG-23 08:15:00 to 11-AUG-23 08:20:00 (CST-6)
Location: LELAND GROVE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Local Official

A few trees were blown down.

Flood in FULTON, ILLINOIS
From 11-AUG-23 06:30:00 to 11-AUG-23 09:30:00 (CST-6)
Location: FARMINGTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A few roadways in Farmington were covered in water.

Flood in TAZEWELL, ILLINOIS
From 11-AUG-23 07:00:00 to 11-AUG-23 10:00:00 (CST-6)
Location: PEKIN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Veerman Street was flooded between Willow Street and Sheridan Road.

Flood in LOGAN, ILLINOIS
From 11-AUG-23 07:55:00 to 11-AUG-23 10:55:00 (CST-6)
Location: LINCOLN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Water over the roadway along Woodlawn Road and adjacent side streets such as College Street and Union Street.

Thunderstorm Wind in FULTON, ILLINOIS
From 11-AUG-23 06:20:00 to 11-AUG-23 06:25:00 (CST-6)
Location: FARMINGTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency Manager estimated wind speeds of 60 miles per hour.

Thunderstorm Wind in KNOX, ILLINOIS
From 11-AUG-23 06:05:00 to 11-AUG-23 06:10:00 (CST-6)
Location: MAQUON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

An uprooted tree fell onto the Maquon District Public Library.

Thunderstorm Wind in PEORIA, ILLINOIS
From 11-AUG-23 06:30:00 to 11-AUG-23 06:35:00 (CST-6)
Location: HANNA CITY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Considerable damage at Wildlife Prairie Park with trees blown down and damage to vehicles.

Thunderstorm Wind in PEORIA, ILLINOIS
From 11-AUG-23 06:40:00 to 11-AUG-23 06:45:00 (CST-6)
Location: BARTONVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree branch was blown down onto the roof of a house.

Thunderstorm Wind in KNOX, ILLINOIS
From 11-AUG-23 05:45:00 to 11-AUG-23 05:50:00 (CST-6)
Location: GALESBURG
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and power lines were blown down.

Thunderstorm Wind in PEORIA, ILLINOIS
From 11-AUG-23 06:35:00 to 11-AUG-23 06:40:00 (CST-6)
Location: BELLEVUE
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in PEORIA, ILLINOIS
From 11-AUG-23 06:15:00 to 11-AUG-23 06:20:00 (CST-6)
Location: ELMWOOD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Power lines were blown down. Additionally, a large tree was split and downed over a road in Elmwood.

Thunderstorm Wind in TAZEWELL, ILLINOIS
From 11-AUG-23 06:45:00 to 11-AUG-23 06:50:00 (CST-6)
Location: PEKIN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A tree was uprooted at the intersection of 14th and Willow in Pekin.