Severe thunderstorms moved across northern Illinois on May 2nd producing large hail and damaging winds.

Hail in COOK, ILLINOIS
From 02-MAY-18 15:46:00 to 02-MAY-18 15:47:00 (CST-6)
Location: MC COOK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Quarter size hail was reported in Summit.

Hail in COOK, ILLINOIS
From 02-MAY-18 15:53:00 to 02-MAY-18 15:54:00 (CST-6)
Location: (MDW)MIDWAY ARPT CHI
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter size hail was reported at Midway Airport.

Thunderstorm Wind in KENDALL, ILLINOIS
From 02-MAY-18 15:30:00 to 02-MAY-18 15:30:00 (CST-6)
Location: PLATTVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A large tree limb was blown down.

Thunderstorm Wind in WILL, ILLINOIS
From 02-MAY-18 15:45:00 to 02-MAY-18 15:45:00 (CST-6)
Location: CREST HILL
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Multiple tree limbs 2 to 6 inches in diameter were blown down.  One evergreen tree 15 to 20 inches in diameter was uprooted.

Hail in KANKAKEE, ILLINOIS
From 02-MAY-18 16:15:00 to 02-MAY-18 16:15:00 (CST-6)
Location: BOURBONNAIS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 02-MAY-18 16:15:00 to 02-MAY-18 16:15:00 (CST-6)
Location: BOURBONNAIS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated to 60 mph.

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 02-MAY-18 16:10:00 to 02-MAY-18 16:10:00 (CST-6)
Location: BOURBONNAIS
Magnitude: 65.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Twenty utility poles were blown down.  Several roofs were pulled back.  A corn crib and metal silos were blown down with debris oriented roughly toward the east.

Hail in WINNEBAGO, ILLINOIS
From 02-MAY-18 16:54:00 to 02-MAY-18 16:54:00 (CST-6)
Location: WINNEBAGO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Penny to quarter size hail was reported on the southwest side of Winnebago.

Hail in WINNEBAGO, ILLINOIS
From 02-MAY-18 17:05:00 to 02-MAY-18 17:10:00 (CST-6)
Location: (RFD)GTR ROCKFORD AR
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail ranging from 1.5 to 2.0 inches in diameter was reported from multiple locations around and to the east of Rockford Airport.

Hail in WINNEBAGO, ILLINOIS
From 02-MAY-18 17:08:00 to 02-MAY-18 17:12:00 (CST-6)
Location: ROCKFORD
Magnitude: 3.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail ranging from 2.5 to 3.0 inches in diameter was reported from multiple locations in far southeast Rockford.

Hail in LEE, ILLINOIS
From 02-MAY-18 17:00:00 to 02-MAY-18 17:00:00 (CST-6)
Location: WEST BROOKLYN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail was mainly dime to nickel size with one quarter size stone.

Hail in MCHENRY, ILLINOIS
From 02-MAY-18 20:12:00 to 02-MAY-18 20:15:00 (CST-6)
Location: RICHMOND
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Hail 2.5 to 2.75 inches in diameter was reported in Richmond.

Hail in MCHENRY, ILLINOIS
From 02-MAY-18 20:19:00 to 02-MAY-18 20:22:00 (CST-6)
Location: SPRING GROVE
Magnitude: 2.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail 2.25 inches in diameter was reported near Winn Road and Route 12.

Hail in KANE, ILLINOIS
From 02-MAY-18 18:06:00 to 02-MAY-18 18:08:00 (CST-6)
Location: GILBERTS
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Thunderstorm Wind in COOK, ILLINOIS
From 02-MAY-18 18:18:00 to 02-MAY-18 18:18:00 (CST-6)
Location: HOFFMAN ESTATES
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A 40 foot tall pine tree was blown down.  Winds were estimated to 65 mph.

Hail in BOONE, ILLINOIS
From 02-MAY-18 17:23:00 to 02-MAY-18 17:24:00 (CST-6)
Location: BELVIDERE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in OGLE, ILLINOIS
From 02-MAY-18 17:32:00 to 02-MAY-18 17:32:00 (CST-6)
Location: BYRON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in DE KALB, ILLINOIS
From 02-MAY-18 17:35:00 to 02-MAY-18 17:40:00 (CST-6)
Location: DE KALB
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter size hail was reported covering the ground near South 1st Street and Milner Avenue.

Hail in LAKE, ILLINOIS
From 02-MAY-18 20:28:00 to 02-MAY-18 20:32:00 (CST-6)
Location: ANTIOCH
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous reports of tree limbs down as well as damage to siding and cars from the hail.

Hail in LAKE, ILLINOIS
From 02-MAY-18 20:34:00 to 02-MAY-18 20:35:00 (CST-6)
Location: LINDENHURST
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Hail in LAKE, ILLINOIS
From 02-MAY-18 20:31:00 to 02-MAY-18 20:35:00 (CST-6)
Location: LAKE VILLA
Magnitude: 2.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Large hail was report at several locations including 1.75 inch diameter hail at Deep Lake Road just south of Grass Lake Road and 2.25 inch diameter hail at Fairfield and Petite Lake Road.

Flood in DU PAGE, ILLINOIS
From 02-MAY-18 22:51:00 to 03-MAY-18 02:00:00 (CST-6)
Location: ELMHURST
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A flooded underpass in downtown Elmhurst was blocked off by police.

Flood in COOK, ILLINOIS
From 02-MAY-18 22:51:00 to 03-MAY-18 02:00:00 (CST-6)
Location: AVONDALE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A viaduct was flooded with 1.5 feet of water at Irving Park Road and Ravenswood Avenue.

Thunderstorm Wind in COOK, ILLINOIS
From 02-MAY-18 15:47:00 to 02-MAY-18 16:07:00 (CST-6)
Location: MC COOK
Magnitude: 70.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A severe thunderstorm moved across south central Cook County producing widespread wind damage.  A wind gust to 67 mph was measured at Midway Airport (KMDW) at 451 pm CDT.  The City of Chicago reported 218 tree limbs blown down or broken; 43 trees were blown down and had to be removed and 15 power lines were blown down.  Near Midway Airport, damage was reported to light poles, vehicles and houses with a large section of a roof torn off.  Numerous trees were blown down and the roof of an apartment building was peeled back east of Interstate 94.  Roof damage was also reported to a building across from Washington Park at 51st and King Drive.

Hail in DE KALB, ILLINOIS
From 02-MAY-18 17:15:00 to 02-MAY-18 17:17:00 (CST-6)
Location: SHABBONA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Golf ball size hail was reported in Lee.

Thunderstorm Wind in WILL, ILLINOIS
From 02-MAY-18 15:45:00 to 02-MAY-18 15:45:00 (CST-6)
Location: LOCKPORT LEWIS ARPT
Magnitude: 55.00 MG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Six utility poles were blown down.