A line of severe thunderstorms moved across northern Illinois during the late morning of August 11th producing wind damage in many areas.  Winds gusted to near severe limits for as much as 20 minutes in some areas behind the line of storms.

Thunderstorm Wind in KENDALL, ILLINOIS
From 11-AUG-21 08:28:00 to 11-AUG-21 08:28:00 (CST-6)
Location: OSWEGO
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree limb was blown down and a fence was blown over.  Half of another tree was snapped at its fork.

Thunderstorm Wind in WILL, ILLINOIS
From 11-AUG-21 08:36:00 to 11-AUG-21 08:36:00 (CST-6)
Location: PLAINFIELD
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Wind gusts were estimated to 65 mph.  A fence panel was blown over.

Thunderstorm Wind in DE KALB, ILLINOIS
From 11-AUG-21 08:15:00 to 11-AUG-21 08:15:00 (CST-6)
Location: WATERMAN
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Siding was ripped off the side of a building in Waterman.

Thunderstorm Wind in KENDALL, ILLINOIS
From 11-AUG-21 08:18:00 to 11-AUG-21 08:20:00 (CST-6)
Location: PLANO
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several trees were snapped or blown down between Sandwich and Plano, including one tree blown down on Little Rock Road.

Thunderstorm Wind in DE KALB, ILLINOIS
From 11-AUG-21 08:17:00 to 11-AUG-21 08:18:00 (CST-6)
Location: SANDWICH
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous trees and power lines were blown down throughout Sandwich.

Thunderstorm Wind in KENDALL, ILLINOIS
From 11-AUG-21 08:24:00 to 11-AUG-21 08:39:00 (CST-6)
Location: PLANO
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A private weather station measured wind gusts above 60 mph for 15 minutes with a peak gust to 68 mph.

Thunderstorm Wind in MCHENRY, ILLINOIS
From 11-AUG-21 09:01:00 to 11-AUG-21 09:01:00 (CST-6)
Location: WOODSTOCK
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree was snapped halfway up.

Thunderstorm Wind in MCHENRY, ILLINOIS
From 11-AUG-21 09:04:00 to 11-AUG-21 09:04:00 (CST-6)
Location: VILLAGE OF LAKEWOOD
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree was snapped.

Thunderstorm Wind in MCHENRY, ILLINOIS
From 11-AUG-21 09:05:00 to 11-AUG-21 09:05:00 (CST-6)
Location: PRAIRIE GROVE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Parts of large trees were snapped off.

Thunderstorm Wind in COOK, ILLINOIS
From 11-AUG-21 09:03:00 to 11-AUG-21 09:03:00 (CST-6)
Location: SCHAUMBURG
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A 9 inch diameter tree limb was blown down.

Thunderstorm Wind in COOK, ILLINOIS
From 11-AUG-21 09:09:00 to 11-AUG-21 09:09:00 (CST-6)
Location: OAK PARK
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Half of a tree was snapped at its fork.

Thunderstorm Wind in LAKE, ILLINOIS
From 11-AUG-21 09:13:00 to 11-AUG-21 09:13:00 (CST-6)
Location: WAUCONDA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Power lines were blown down onto roads.

Thunderstorm Wind in LAKE, ILLINOIS
From 11-AUG-21 09:16:00 to 11-AUG-21 09:16:00 (CST-6)
Location: INGLESIDE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree was blown down onto a fence.

Thunderstorm Wind in LAKE, ILLINOIS
From 11-AUG-21 09:17:00 to 11-AUG-21 09:17:00 (CST-6)
Location: GRAYSLAKE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree was uprooted.

Thunderstorm Wind in LAKE, ILLINOIS
From 11-AUG-21 09:18:00 to 11-AUG-21 09:18:00 (CST-6)
Location: FOX LAKE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several trees were snapped or blown down.

Thunderstorm Wind in LAKE, ILLINOIS
From 11-AUG-21 09:26:00 to 11-AUG-21 09:26:00 (CST-6)
Location: ANTIOCH
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Siding was ripped off of a house and a fence was blown down.

Thunderstorm Wind in KANE, ILLINOIS
From 11-AUG-21 08:38:00 to 11-AUG-21 08:38:00 (CST-6)
Location: BATAVIA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Tree limbs 8 inches in diameter and power lines were blown down.

Thunderstorm Wind in LAKE, ILLINOIS
From 11-AUG-21 09:14:00 to 11-AUG-21 09:14:00 (CST-6)
Location: LIBERTYVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Multiple large tree limbs were blown down.

Thunderstorm Wind in LEE, ILLINOIS
From 11-AUG-21 07:50:00 to 11-AUG-21 07:50:00 (CST-6)
Location: SUBLETTE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Large tree limbs were blown down.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 11-AUG-21 07:54:00 to 11-AUG-21 07:54:00 (CST-6)
Location: MENDOTA
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Numerous trees were blown down.

Thunderstorm Wind in KANE, ILLINOIS
From 11-AUG-21 08:35:00 to 11-AUG-21 08:35:00 (CST-6)
Location: AURORA
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A 12 inch diameter tree limb was blown down.

Thunderstorm Wind in KENDALL, ILLINOIS
From 11-AUG-21 08:35:00 to 11-AUG-21 08:35:00 (CST-6)
Location: MONTGOMERY
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust to 68 mph was measured by a personal weather station.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 11-AUG-21 08:01:00 to 11-AUG-21 08:06:00 (CST-6)
Location: EARLVILLE
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Widespread significant wind damage occurred across portions of northern La Salle County consisting of snapped trees near their base, snapped utility poles, flattened corn and damage to farm buildings.  Winds were estimated to at least 80 mph.

Thunderstorm Wind in KANE, ILLINOIS
From 11-AUG-21 08:26:00 to 11-AUG-21 08:52:00 (CST-6)
Location: (ARR) AURORA MUNICIPAL AIRPORT
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Winds gusted to 58 mph or higher for 26 minutes with a peak gust to 64 mph.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 11-AUG-21 08:08:00 to 11-AUG-21 08:08:00 (CST-6)
Location: LELAND
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Trees and tree limbs were blown down.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 11-AUG-21 08:19:00 to 11-AUG-21 08:19:00 (CST-6)
Location: MILLINGTON
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Trees and power lines were blown down.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 11-AUG-21 08:46:00 to 11-AUG-21 08:46:00 (CST-6)
Location: NAPERVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Tree debris on a road caused it to be closed.

Thunderstorm Wind in WINNEBAGO, ILLINOIS
From 11-AUG-21 08:36:00 to 11-AUG-21 08:38:00 (CST-6)
Location: ROCKFORD
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple reports of tree damage in Rockford were received.

Thunderstorm Wind in LEE, ILLINOIS
From 11-AUG-21 07:56:00 to 11-AUG-21 07:56:00 (CST-6)
Location: COMPTON
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A wind turbine blade was blown off.

Thunderstorm Wind in LEE, ILLINOIS
From 11-AUG-21 08:01:00 to 11-AUG-21 08:01:00 (CST-6)
Location: COMPTON
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust to 67 mph was measured by a personal weather station in Compton.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 11-AUG-21 07:58:00 to 11-AUG-21 07:58:00 (CST-6)
Location: PRAIRIE CENTER
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Part of the roof of a farm building was peeled off.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 11-AUG-21 08:06:00 to 11-AUG-21 08:06:00 (CST-6)
Location: EARLVILLE
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust to 69 mph was measured by a personal weather station east of Earlville.

Thunderstorm Wind in COOK, ILLINOIS
From 11-AUG-21 09:04:00 to 11-AUG-21 09:04:00 (CST-6)
Location: (MDW) CHICAGO MIDWAY AIRPORT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in WINNEBAGO, ILLINOIS
From 11-AUG-21 09:08:00 to 11-AUG-21 09:08:00 (CST-6)
Location: ROCKFORD
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A tree fell onto a mobile home in the Riverview Mobile Home Park.  Three occupants were rescued.  One of the rescued, a 55 year old woman, died from her injuries.

Thunderstorm Wind in KENDALL, ILLINOIS
From 11-AUG-21 08:22:00 to 11-AUG-21 08:22:00 (CST-6)
Location: LITTLE ROCK
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large oak tree was snapped at its base.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 11-AUG-21 08:37:00 to 11-AUG-21 08:37:00 (CST-6)
Location: MINOOKA
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree was blown down.

Thunderstorm Wind in KANE, ILLINOIS
From 11-AUG-21 08:38:00 to 11-AUG-21 08:38:00 (CST-6)
Location: BATAVIA
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree limb was blown down.

Thunderstorm Wind in KANE, ILLINOIS
From 11-AUG-21 08:43:00 to 11-AUG-21 08:43:00 (CST-6)
Location: GENEVA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A fence was blown down.

Thunderstorm Wind in DE KALB, ILLINOIS
From 11-AUG-21 08:10:00 to 11-AUG-21 08:10:00 (CST-6)
Location: SOMONAUK
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Part of a large tree was snapped off.

Thunderstorm Wind in WINNEBAGO, ILLINOIS
From 11-AUG-21 08:30:00 to 11-AUG-21 08:30:00 (CST-6)
Location: (RFD) ROCKFORD AIRPORT
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in KENDALL, ILLINOIS
From 11-AUG-21 08:30:00 to 11-AUG-21 08:30:00 (CST-6)
Location: BOULDER HILL
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Multiple large tree limbs were blown down.

Thunderstorm Wind in KANE, ILLINOIS
From 11-AUG-21 08:33:00 to 11-AUG-21 08:33:00 (CST-6)
Location: AURORA
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree limb was blown down in Wilder Park.  A nearby utility pole was tilted.

Thunderstorm Wind in WILL, ILLINOIS
From 11-AUG-21 08:54:00 to 11-AUG-21 08:54:00 (CST-6)
Location: NEW LENOX
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple trees were blown down.

Thunderstorm Wind in KANE, ILLINOIS
From 11-AUG-21 08:54:00 to 11-AUG-21 08:54:00 (CST-6)
Location: SOUTH ELGIN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree limb was blown down.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 11-AUG-21 08:47:00 to 11-AUG-21 08:47:00 (CST-6)
Location: WINFIELD
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Part of a large tree was snapped at its base.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 11-AUG-21 08:55:00 to 11-AUG-21 08:55:00 (CST-6)
Location: LISLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several large tree limbs were blown down along Maple Avenue.

Thunderstorm Wind in BOONE, ILLINOIS
From 11-AUG-21 08:49:00 to 11-AUG-21 08:51:00 (CST-6)
Location: BELVIDERE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and power lines were blown down in various locations in and around Belvidere.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 11-AUG-21 08:55:00 to 11-AUG-21 08:55:00 (CST-6)
Location: DOWNERS GROVE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Part of a tree was snapped off.

Thunderstorm Wind in KANE, ILLINOIS
From 11-AUG-21 09:00:00 to 11-AUG-21 09:00:00 (CST-6)
Location: SLEEPY HOLLOW
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree was uprooted.

Thunderstorm Wind in KANE, ILLINOIS
From 11-AUG-21 08:59:00 to 11-AUG-21 08:59:00 (CST-6)
Location: ELGIN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree limb was blown down.

Thunderstorm Wind in MCHENRY, ILLINOIS
From 11-AUG-21 09:09:00 to 11-AUG-21 09:09:00 (CST-6)
Location: WONDER LAKE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several trees were blown down in Wonder Lake.

Thunderstorm Wind in BOONE, ILLINOIS
From 11-AUG-21 08:55:00 to 11-AUG-21 08:55:00 (CST-6)
Location: TIMBERLANE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down onto power lines.

Thunderstorm Wind in LAKE, ILLINOIS
From 11-AUG-21 09:29:00 to 11-AUG-21 09:29:00 (CST-6)
Location: (UGN) WAUKEGAN AIRPORT
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in LAKE, ILLINOIS
From 11-AUG-21 09:30:00 to 11-AUG-21 09:30:00 (CST-6)
Location: BEACH PARK
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several large trees were blown down.

Thunderstorm Wind in WILL, ILLINOIS
From 11-AUG-21 08:38:00 to 11-AUG-21 08:38:00 (CST-6)
Location: PLAINFIELD
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A tree was blown down onto a fence.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 11-AUG-21 08:09:00 to 11-AUG-21 08:09:00 (CST-6)
Location: OTTAWA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree limbs 6 to 8 inches in diameter were blown down.

Thunderstorm Wind in COOK, ILLINOIS
From 11-AUG-21 09:08:00 to 11-AUG-21 09:08:00 (CST-6)
Location: HOMEWOOD
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two large trees approximately 20 inches in diameter were blown down.

Thunderstorm Wind in KANE, ILLINOIS
From 11-AUG-21 08:34:00 to 11-AUG-21 08:34:00 (CST-6)
Location: NORTH AURORA
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree was snapped.

Thunderstorm Wind in KANE, ILLINOIS
From 11-AUG-21 08:28:00 to 11-AUG-21 08:28:00 (CST-6)
Location: (ARR) AURORA MUNICIPAL AIRPORT
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A large tree was snapped.