Scattered strong to severe thunderstorms moved across northern Illinois during the afternoon of June 12th producing sporadic hail and wind damage.  A more widespread area of wind damage occurred across portions of Iroquois County, where a brief gustnado was observed near Onarga.

Thunderstorm Wind in IROQUOIS, ILLINOIS
From 12-JUN-21 16:40:00 to 12-JUN-21 16:41:00 (CST-6)
Location: IDAVILLE CORNER
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Video of a gustnado was shared on social media.  The gustnado moved south through fields approximately 6 miles southeast of Onarga.  No damage was reported.

Hail in COOK, ILLINOIS
From 12-JUN-21 13:15:00 to 12-JUN-21 13:16:00 (CST-6)
Location: ELK GROVE VILLAGE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter size hail was reported near Arlington Heights Road and Landmeier Road.

Thunderstorm Wind in COOK, ILLINOIS
From 12-JUN-21 13:47:00 to 12-JUN-21 13:47:00 (CST-6)
Location: (MDW) CHICAGO MIDWAY AIRPORT
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in COOK, ILLINOIS
From 12-JUN-21 13:45:00 to 12-JUN-21 13:45:00 (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 IROQUOIS, ILLINOIS
From 12-JUN-21 16:15:00 to 12-JUN-21 16:15:00 (CST-6)
Location: DANFORTH
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A box truck was blown over on Interstate 57 near mile marker 290.  No injuries were reported.

Thunderstorm Wind in IROQUOIS, ILLINOIS
From 12-JUN-21 16:44:00 to 12-JUN-21 16:44:00 (CST-6)
Location: BUCKLEY
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Ten utility poles were snapped at their base along 700N Road, west of Interstate 57.

Thunderstorm Wind in IROQUOIS, ILLINOIS
From 12-JUN-21 16:47:00 to 12-JUN-21 16:47:00 (CST-6)
Location: CISSNA PARK
Magnitude: 65.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A personal weather station measured a gust to 75 mph.

Hail in KANE, ILLINOIS
From 12-JUN-21 13:54:00 to 12-JUN-21 13:55:00 (CST-6)
Location: BATAVIA
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A photo of half dollar size hail was shared on social media.

Hail in IROQUOIS, ILLINOIS
From 12-JUN-21 16:50:00 to 12-JUN-21 16:51:00 (CST-6)
Location: BUCKLEY
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm Wind in IROQUOIS, ILLINOIS
From 12-JUN-21 16:45:00 to 12-JUN-21 16:45:00 (CST-6)
Location: BUCKLEY
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A large healthy tree was snapped at the trunk.

Thunderstorm Wind in IROQUOIS, ILLINOIS
From 12-JUN-21 16:45:00 to 12-JUN-21 16:45:00 (CST-6)
Location: BUCKLEY
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A tree was blown down in Buckley.  Power outages were reported.

Thunderstorm Wind in IROQUOIS, ILLINOIS
From 12-JUN-21 16:48:00 to 12-JUN-21 16:48:00 (CST-6)
Location: CISSNA PARK
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Two large corrugated metal hog feed tanks (silos) were blown over.  The tanks were anchored to the ground.

Thunderstorm Wind in IROQUOIS, ILLINOIS
From 12-JUN-21 16:50:00 to 12-JUN-21 16:50:00 (CST-6)
Location: CISSNA PARK
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A portion of a metal roof was blown off of a 30 by 50 foot farm outbuilding.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 12-JUN-21 13:24:00 to 12-JUN-21 13:24:00 (CST-6)
Location: ITASCA
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A wind gust to 61 mph was measured with a hand held anemometer.

Hail in KANE, ILLINOIS
From 12-JUN-21 13:29:00 to 12-JUN-21 13:30:00 (CST-6)
Location: CARPENTERSVILLE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy Rain in COOK, ILLINOIS
From 12-JUN-21 13:10:00 to 12-JUN-21 13:40:00 (CST-6)
Location: BROOKFIELD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Rainfall of 1.80 inches was reported in 30 minutes.

Heavy Rain in COOK, ILLINOIS
From 12-JUN-21 12:56:00 to 12-JUN-21 13:36:00 (CST-6)
Location: SCHAUMBURG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Rainfall of 1.98 inches was reported in 40 minutes.

Hail in KANE, ILLINOIS
From 12-JUN-21 14:38:00 to 12-JUN-21 14:39:00 (CST-6)
Location: AURORA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel to quarter size hail was reported.

Flood in COOK, ILLINOIS
From 12-JUN-21 13:30:00 to 12-JUN-21 14:30:00 (CST-6)
Location: ELK GROVE VILLAGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Minor street flooding was reported.  Rainfall of 2.49 inches was reported, which occurred over approximately 2 hours.