Scattered thunderstorms developed across northern Illinois during the evening hours of June 26th producing large hail and wind damage.  These thunderstorms then produced heavy rain which caused flash flooding in the southern suburbs of the Chicago Metro area into the early morning hours of June 27th.

Flash Flood in COOK, ILLINOIS
From 26-JUN-19 23:45:00 to 27-JUN-19 07:30:00 (CST-6)
Location: (IGQ) LANSING MUNICIPAL AIRPORT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Burnham Avenue was closed near Plum Creek Forest Preserve due to flooding.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 26-JUN-19 19:05:00 to 26-JUN-19 19:05:00 (CST-6)
Location: BURR RIDGE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Significant roof damage was reported to a condo in Darien which forced everyone to evacuate the building.

Heavy Rain in WILL, ILLINOIS
From 27-JUN-19 02:00:00 to 27-JUN-19 02:00:00 (CST-6)
Location: CRETE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Storm total rainfall of 4.78 inches was measured.

Heavy Rain in COOK, ILLINOIS
From 27-JUN-19 04:00:00 to 27-JUN-19 04:00:00 (CST-6)
Location: PARK FOREST SOUTH
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Storm total rainfall of 3.56 inches was measured.

Heavy Rain in COOK, ILLINOIS
From 30-JUN-19 05:00:00 to 30-JUN-19 05:00:00 (CST-6)
Location: PARK FOREST
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm total rainfall of 4.11 inches was measured.

Thunderstorm Wind in WILL, ILLINOIS
From 26-JUN-19 20:00:00 to 26-JUN-19 20:00:00 (CST-6)
Location: STEGER
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Trees, tree limbs and power lines were blown down.  Some tree limbs were blown down onto vehicles.

Heavy Rain in WILL, ILLINOIS
From 27-JUN-19 05:00:00 to 27-JUN-19 05:00:00 (CST-6)
Location: CRETE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Storm total rainfall of 3.61 inches was measured.

Flash Flood in COOK, ILLINOIS
From 27-JUN-19 00:00:00 to 27-JUN-19 03:00:00 (CST-6)
Location: PARK FOREST
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Several cars got stuck in flood waters on Sauk Trail east of Western Avenue.  One water rescue was reported where a fire truck was positioned for a driver to step into the truck.

Heavy Rain in WILL, ILLINOIS
From 27-JUN-19 01:53:00 to 27-JUN-19 01:53:00 (CST-6)
Location: FAITHORN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Storm total rainfall of 3.12 inches was measured.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 26-JUN-19 18:45:00 to 26-JUN-19 18:45:00 (CST-6)
Location: FOUR LAKES
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Several trees and tree limbs were snapped.

Hail in COOK, ILLINOIS
From 26-JUN-19 18:31:00 to 26-JUN-19 18:33:00 (CST-6)
Location: STREAMWOOD
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in COOK, ILLINOIS
From 26-JUN-19 18:35:00 to 26-JUN-19 18:37:00 (CST-6)
Location: HOFFMAN ESTATES
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in WILL, ILLINOIS
From 26-JUN-19 18:51:00 to 26-JUN-19 18:51:00 (CST-6)
Location: (1C5) BOLINGBROOK CLOW AIRPORT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WILL, ILLINOIS
From 26-JUN-19 19:30:00 to 26-JUN-19 19:30:00 (CST-6)
Location: STEGER
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flash Flood in COOK, ILLINOIS
From 27-JUN-19 00:00:00 to 27-JUN-19 07:30:00 (CST-6)
Location: CHICAGO HEIGHTS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Photos showed Thorn Creek flowing over 26th Street.

Hail in DU PAGE, ILLINOIS
From 26-JUN-19 19:30:00 to 26-JUN-19 19:31:00 (CST-6)
Location: FRONTEAC
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Quarter size hail was reported near Route 34 and Eola Road.

Hail in WILL, ILLINOIS
From 26-JUN-19 19:42:00 to 26-JUN-19 19:43:00 (CST-6)
Location: CATON FARM
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Quarter size hail was reported near Caton Farm and County Line Roads.

Thunderstorm Wind in COOK, ILLINOIS
From 26-JUN-19 19:55:00 to 26-JUN-19 19:55:00 (CST-6)
Location: MATTESON
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Numerous trees were damaged with tree limbs blown down.

Flash Flood in COOK, ILLINOIS
From 26-JUN-19 23:45:00 to 27-JUN-19 07:30:00 (CST-6)
Location: OLYMPIA FIELDS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flooding of unknown severity was reported in Matteson, Park Forest, Olympia Fields and Richton Park.

Flash Flood in WILL, ILLINOIS
From 26-JUN-19 23:30:00 to 27-JUN-19 07:30:00 (CST-6)
Location: STEGER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Widespread street and basement flooding was reported in the Steger and Crete areas.  In Crete, several intersections were closed with up to 4 feet of water.  Some vehicles were stranded in the flood waters.  In Steger, downtown was flooded.  Chicago Road was impassible with flood waters nearing structures.  A man in his 80's had to be rescued after his car stalled in flood waters on Chicago Road near 31st Street.  The public works parking lot was flooded.  Route 1 was closed at a railroad underpass near Union Avenue.