Severe thunderstorms moved across northern Illinois during the evening hours of Saturday, March 31st, producing winds in excess of 60 mph across many locations.

Thunderstorm Wind in DE KALB, ILLINOIS
From 31-MAR-07 20:00:00 to 31-MAR-07 20:22:00 (CST-6)
Location: DE KALB
Magnitude: 65.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A large tree was blown down at Route 23 and Lucerne Lane, two blocks north of Interstate 88.  Several branches were blown down from this location north to Route 38.  A tree was blown down at Route 23 and Hillcrest.  At Hopkins Park on Royal Drive, 19 trees were blown down along with numerous large limbs.  In a wooded area south of the Park, another 9 trees were blown down.  Across from Hopkins Park, a utility pole was blown down at Route 23 across from Hopkins Park.  Two pine trees across from Ranger Road were snapped.  Trees were blown down in Greenwood Acres just southwest of Route 23 and Bethany Road.  A building under construction collapsed at Route 23 and Mercantile Road in Sycamore.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 31-MAR-07 20:49:00 to 31-MAR-07 20:49:00 (CST-6)
Location: CAROL STREAM
Magnitude: 83.00 EG
Property damage: 1.00M
Crop damage: 0.00K
Reported by: NWS Storm Survey

A microburst caused significant wind damage in Carol Stream and Glendale Heights.  The damage occurred across an area about one half mile long and 250 yards wide, just to the east of Schmale Road near the intersection with North Avenue.
The most severe damage occurred at an apartment complex east of Schmale Road between Willow Woods Drive and Burns Street in Carol Stream.  Here a three story apartment building had a substantial portion of its roof entirely peeled off by winds and many windows were blown out.  Two other apartment buildings lost significant portions of their roofs, while six other buildings sustained significant roof damage.  Many large trees were uprooted around the grounds.
Located adjacent to and to the north of the apartment complex, a church sustained significant damage to its roof.  This structure was formally a large discount store.  Debris from the apartments was strewn throughout the church's parking lot and onto North Avenue.  Further to the north, across North Avenue, a few large trees were uprooted or blown down.  There was also significant damage to the roof at a manufacturing company in Glendale Heights.  Here a 60 by 80 foot section of roof was peeled off on the southeast corner of the structure.  There were also two or three holes about 8 to 10 feet across punched in the roof.
Located to the south of the apartment complex, there was damage to the roof facade on a medical office building located along the south side of St. Charles Road just east of Schmale Road. Further south, there were trees blown down and shingles and small sections of siding peeled up from roofs at two other apartment complexes.

Thunderstorm Wind in KANE, ILLINOIS
From 31-MAR-07 20:50:00 to 31-MAR-07 20:50:00 (CST-6)
Location: MARYWOOD
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A utility shed and a farmhouse were damaged at Farnsworth and Indian Trail roads.

Hail in LA SALLE, ILLINOIS
From 31-MAR-07 19:39:00 to 31-MAR-07 19:41:00 (CST-6)
Location: OTTAWA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Penny size hail was reported on Route 23, just south of Interstate 80.

Thunderstorm Wind in WILL, ILLINOIS
From 31-MAR-07 20:29:00 to 31-MAR-07 20:29:00 (CST-6)
Location: CRYSTAL LAWNS
Magnitude: 54.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in COOK, ILLINOIS
From 31-MAR-07 20:52:00 to 31-MAR-07 20:52:00 (CST-6)
Location: HANOVER PARK
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in MCHENRY, ILLINOIS
From 31-MAR-07 20:55:00 to 31-MAR-07 20:55:00 (CST-6)
Location: HUNTLEY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Thunderstorm Wind in DU PAGE, ILLINOIS
From 31-MAR-07 20:59:00 to 31-MAR-07 20:59:00 (CST-6)
Location: NORTH LAKE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Thunderstorm Wind in WILL, ILLINOIS
From 31-MAR-07 21:07:00 to 31-MAR-07 21:07:00 (CST-6)
Location: CRETE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Tree limbs blown down.

Thunderstorm Wind in COOK, ILLINOIS
From 31-MAR-07 21:17:00 to 31-MAR-07 21:17:00 (CST-6)
Location: LANSING
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Flood in KENDALL, ILLINOIS
From 31-MAR-07 21:25:00 to 31-MAR-07 21:25:00 (CST-6)
Location: OSWEGO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Four to five inches of water on Minkler and Reservation Roads.

Thunderstorm Wind in KANE, ILLINOIS
From 31-MAR-07 20:25:00 to 31-MAR-07 20:25:00 (CST-6)
Location: AURORA
Magnitude: 70.00 EG
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Newspaper

A maintenance building and two condo buildings were damaged by high winds.  Ten large trees were also uprooted.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 31-MAR-07 19:58:00 to 31-MAR-07 19:58:00 (CST-6)
Location: SHERIDAN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large tree limbs were blown down.

Thunderstorm Wind in KENDALL, ILLINOIS
From 31-MAR-07 20:11:00 to 31-MAR-07 20:11:00 (CST-6)
Location: NEWARK
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree limbs blown down.

Thunderstorm Wind in KANE, ILLINOIS
From 31-MAR-07 20:25:00 to 31-MAR-07 20:25:00 (CST-6)
Location: AURORA
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Tree limbs blown down.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 31-MAR-07 20:37:00 to 31-MAR-07 20:37:00 (CST-6)
Location: WARRENVILLE
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Tree limbs blown down.

Thunderstorm Wind in KANE, ILLINOIS
From 31-MAR-07 20:40:00 to 31-MAR-07 20:40:00 (CST-6)
Location: BATAVIA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree limbs blown down.

Thunderstorm Wind in DE KALB, ILLINOIS
From 31-MAR-07 20:20:00 to 31-MAR-07 20:20:00 (CST-6)
Location: DE KALB
Magnitude: 61.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Public

At South Pointe off Gurler Road, a large portion of a roof was blown off including the roof liner, insulation and roofing.  Two trees were blown down onto Gurler Road.

Thunderstorm Wind in BOONE, ILLINOIS
From 31-MAR-07 20:44:00 to 31-MAR-07 20:44:00 (CST-6)
Location: CAPRON
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down on Burr Oak Road in Leroy Township.  Another tree was blown down on Caledonia Road in Caledonia Township and wires were blown down on Denny Road in Bonus Township.

Thunderstorm Wind in WILL, ILLINOIS
From 31-MAR-07 20:45:00 to 31-MAR-07 20:45:00 (CST-6)
Location: BRAIDWOOD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree limbs blown down on roadways.

Thunderstorm Wind in MCHENRY, ILLINOIS
From 31-MAR-07 20:55:00 to 31-MAR-07 20:55:00 (CST-6)
Location: HUNTLEY
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Tree limbs blown down.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 31-MAR-07 20:57:00 to 31-MAR-07 20:57:00 (CST-6)
Location: BENSENVILLE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Four trees blown down at White Pines and Pine Grove.

Thunderstorm Wind in LAKE, ILLINOIS
From 31-MAR-07 21:01:00 to 31-MAR-07 21:01:00 (CST-6)
Location: LAKE ZURICH
Magnitude: 56.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree limb fell on a car and broke the windshield.

Thunderstorm Wind in MCHENRY, ILLINOIS
From 31-MAR-07 21:10:00 to 31-MAR-07 21:10:00 (CST-6)
Location: MARENGO
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree limbs were blown down.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 31-MAR-07 19:14:00 to 31-MAR-07 19:14:00 (CST-6)
Location: RUTLAND
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in LA SALLE, ILLINOIS
From 31-MAR-07 19:39:00 to 31-MAR-07 19:39:00 (CST-6)
Location: TROY GROVE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree limbs blown down.

Thunderstorm Wind in LEE, ILLINOIS
From 31-MAR-07 19:40:00 to 31-MAR-07 19:40:00 (CST-6)
Location: THE BURG
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree limbs blown down.

Thunderstorm Wind in LEE, ILLINOIS
From 31-MAR-07 19:46:00 to 31-MAR-07 19:46:00 (CST-6)
Location: PAW PAW
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in KANE, ILLINOIS
From 31-MAR-07 20:23:00 to 31-MAR-07 20:23:00 (CST-6)
Location: MONTGOMERY
Magnitude: 68.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in KANE, ILLINOIS
From 31-MAR-07 20:28:00 to 31-MAR-07 20:28:00 (CST-6)
Location: SUGAR GROVE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in KENDALL, ILLINOIS
From 31-MAR-07 20:19:00 to 31-MAR-07 20:19:00 (CST-6)
Location: BRISTOL STATION
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A gust to 70 mph was measured in Bristol.