Strong to severe thunderstorms moved across parts of northern Illinois during the afternoon and evening hours of September 21st.

Thunderstorm Wind in WILL, ILLINOIS
From 21-SEP-10 18:14:00 to 21-SEP-10 18:14:00 (CST-6)
Location: LOCKPORT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

One large tree limb was blown down across a road.

Thunderstorm Wind in COOK, ILLINOIS
From 21-SEP-10 17:15:00 to 21-SEP-10 17:15:00 (CST-6)
Location: NORTHBROOK
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Numerous tree limbs 15 to 20 feet in length were blown down in the area of Thornwood and Laurel Lanes and Keystone and Keist Avenues.

Thunderstorm Wind in COOK, ILLINOIS
From 21-SEP-10 17:15:00 to 21-SEP-10 17:15:00 (CST-6)
Location: NORTH NORTHFIELD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A large tree limb was blown off a willow tree near the 2700 block of Sanders Road.

Thunderstorm Wind in LAKE, ILLINOIS
From 21-SEP-10 17:10:00 to 21-SEP-10 17:10:00 (CST-6)
Location: MUNDELEIN
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees 15 to 20 inches in diameter were blown down.

Thunderstorm Wind in COOK, ILLINOIS
From 21-SEP-10 17:09:00 to 21-SEP-10 17:09:00 (CST-6)
Location: PALATINE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A 12 inch diameter tree was blown down along with numerous tree limbs.

Thunderstorm Wind in LAKE, ILLINOIS
From 21-SEP-10 17:10:00 to 21-SEP-10 17:10:00 (CST-6)
Location: PRAIRIE VIEW
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Lightning in LAKE, ILLINOIS
From 21-SEP-10 17:10:00 to 21-SEP-10 17:10:00 (CST-6)
Location: MUNDELEIN
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

An 18 inch diameter tree was struck by lightning on High Street.  Part of the tree fell onto a house.

Thunderstorm Wind in COOK, ILLINOIS
From 21-SEP-10 17:10:00 to 21-SEP-10 17:10:00 (CST-6)
Location: DUNHURST
Magnitude: 70.00 EG
Property damage: 1.00M
Crop damage: 0.00K
Reported by: Newspaper

Roofs were blown off three industrial buildings on Glenn Avenue between Chaddick Drive and Shepard Avenue.  Vehicle windows were smashed and some trees were completely snapped off.

Thunderstorm Wind in COOK, ILLINOIS
From 21-SEP-10 17:12:00 to 21-SEP-10 17:12:00 (CST-6)
Location: GOLDEN ACRES
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree limbs were blown down with estimated wind gusts between 65 mph and 70 mph near Golf and Rand Roads.

Thunderstorm Wind in OGLE, ILLINOIS
From 21-SEP-10 15:30:00 to 21-SEP-10 15:30:00 (CST-6)
Location: MT MORRIS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Wind gusts were estimated to 60 mph in Mount Morris.

Thunderstorm Wind in LEE, ILLINOIS
From 21-SEP-10 15:31:00 to 21-SEP-10 15:31:00 (CST-6)
Location: DIXON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A seven inch diameter tree limb was blown down.

Thunderstorm Wind in OGLE, ILLINOIS
From 21-SEP-10 15:40:00 to 21-SEP-10 15:40:00 (CST-6)
Location: OREGON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

An eight inch diameter tree limb was blown down.

Thunderstorm Wind in WINNEBAGO, ILLINOIS
From 21-SEP-10 15:51:00 to 21-SEP-10 15:51:00 (CST-6)
Location: WEST END
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A tree was blown down blocking a lane near 7800 West State Street.

Thunderstorm Wind in KANE, ILLINOIS
From 21-SEP-10 16:47:00 to 21-SEP-10 16:47:00 (CST-6)
Location: ELGIN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Wind gusts were estimated to 60 mph.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 21-SEP-10 16:50:00 to 21-SEP-10 16:50:00 (CST-6)
Location: BARTLETT
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Two large trees were blown down across roads.

Hail in MCHENRY, ILLINOIS
From 21-SEP-10 16:50:00 to 21-SEP-10 16:54:00 (CST-6)
Location: LAKE IN THE HILLS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LA SALLE, ILLINOIS
From 21-SEP-10 13:33:00 to 21-SEP-10 13:35:00 (CST-6)
Location: OTTAWA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LA SALLE, ILLINOIS
From 21-SEP-10 13:52:00 to 21-SEP-10 13:54:00 (CST-6)
Location: OTTAWA
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WINNEBAGO, ILLINOIS
From 21-SEP-10 15:25:00 to 21-SEP-10 15:27:00 (CST-6)
Location: PECATONICA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in COOK, ILLINOIS
From 21-SEP-10 17:00:00 to 21-SEP-10 17:00:00 (CST-6)
Location: FLOSSMOOR
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Power lines and small tree limbs were blown down.

Thunderstorm Wind in COOK, ILLINOIS
From 21-SEP-10 17:00:00 to 21-SEP-10 17:00:00 (CST-6)
Location: CALUMET
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Six inch diameter tree limbs were blown down near 183rd Street and Hardwood Avenue.

Thunderstorm Wind in COOK, ILLINOIS
From 21-SEP-10 17:05:00 to 21-SEP-10 17:05:00 (CST-6)
Location: ARLINGTON HGTS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Six inch diameter tree limbs were blown down blocking Wilke Road, about one half mile south of Northwest Highway.

Thunderstorm Wind in LAKE, ILLINOIS
From 21-SEP-10 17:10:00 to 21-SEP-10 17:10:00 (CST-6)
Location: MUNDELEIN
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees and tree limbs up to 18 inches in diameter were blown down along High Street between Route 45 and Walnut Court.  Other tree limbs were blown down in parts of Mundelein.

Thunderstorm Wind in MCHENRY, ILLINOIS
From 21-SEP-10 16:52:00 to 21-SEP-10 16:52:00 (CST-6)
Location: HUNTLEY
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two large trees were blown down on Route 62 blocking the eastbound right lane, just west of Lakewood Road.  Wind gusts were measured to 72 mph.

Thunderstorm Wind in WINNEBAGO, ILLINOIS
From 21-SEP-10 15:58:00 to 21-SEP-10 15:59:00 (CST-6)
Location: LOVES PARK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

A man was struck and injured by a falling tree while exercising in his back yard.

Thunderstorm Wind in COOK, ILLINOIS
From 21-SEP-10 17:05:00 to 21-SEP-10 17:05:00 (CST-6)
Location: CLABURN
Magnitude: 65.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several trees, tree limbs and power lines were blown down in the Hegewisch neighborhood of Chicago.  Considerable damage was reported between 131st and 135th Streets.

Hail in MCHENRY, ILLINOIS
From 21-SEP-10 16:40:00 to 21-SEP-10 16:42:00 (CST-6)
Location: GREENWOOD GALT ARPT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Nickel size hail was reported at Galt Airport.