Strong thunderstorms, some supercells, developed over northeast Illinois from early afternoon through early evening in a very unstable airmass.  The first storm pounded Kankakee county with hail up to golfball size.  Other storms quickly developed in northern Cook, and in McHenry and Lake counties.  Golfball size hail hit the areas of Buffalo Grove, Wheeling, and Deerfield along Lake-Cook Road.  The hail damaged police cars and cracked the windshield of a vehicle in Wheeling.  A car was dented in Deerfield.  This storm also blew down tree limbs in Deerfield.  Another storm in Ottawa in LaSalle county produced hail the size of golfballs, injuring a person at Chambers and Glover Streets.  60 mph winds in and near Ottawa damaged corn crops and blew tree limbs down on the road.  A bolt of lightning struck a tree in Ottawa causing the tree to fall onto a fence and pool which were damaged.  A storm dropped hail in southern Grundy and southwest Will counties.  Hail damaged crops from north and east of Kinsman to just west of Verona, just east of Mazon, north and east of Gardner, and north of Morris in Grundy county.  Trees, large limbs and power lines were blown down in Gardner.  Hail also fell from near Wilmington in Will county into Kankakee county near Essex.  Another storm in northern Will county dropped hail up to 1.25 inches in diameter from the far west side of Joliet and Plainfiled near Drauden and Caton Farm, across I-55 and Route 30, to I-55 and Weber Road in Romeoville and Bolingbrook.  This storm also caused tree damage in Lemont in Cook county.  Later in the afternoon a storm dropped hail 1 to 2 inches in diameter across DuPage county. Some locations included Army Trail and Gary in Bloomingdale, 2 miles north of Route 64 and 59 in West Chicago, Route 83 and Grand in Addison, Glendale Heights, Wheaton and Lombard.  The biggest hail report was 2 inches at Carol Stream.  Other storms produced hail near Ashkum in Iroquois county and into northwest Indiana.  Storms produced more hail in southern Cook and northern Will counties in the early evening before ending.  Tree branches were also blown down around Orland Park and Oak Forest.

Hail in WILL, ILLINOIS
From 06-JUL-03 17:35:00 to 06-JUL-03 17:40:00 (CST)
Location: JOLIET
Magnitude: 0.75 
Reported by: EMERGENCY MANAGER

Hail in WILL, ILLINOIS
From 06-JUL-03 17:47:00 to 06-JUL-03 17:52:00 (CST)
Location: JOLIET
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Larkin and Ingalls, and at I-55 and Black Road.

Hail in WILL, ILLINOIS
From 06-JUL-03 18:10:00 to 06-JUL-03 18:15:00 (CST)
Location: JOLIET
Magnitude: 0.88 
Reported by: LAW ENFORCEMENT

52 and Laraway Road.

Hail in LEE, ILLINOIS
From 06-JUL-03 19:40:00 to 06-JUL-03 19:45:00 (CST)
Location: HARMON
Magnitude: 0.75 
Reported by: GOVT OFFICIAL

Thunderstorm Wind in GRUNDY, ILLINOIS
From 06-JUL-03 14:05:00 to 06-JUL-03 14:05:00 (CST)
Location: GARDNER
Magnitude: 52 EG
Reported by: NEWSPAPER

Lightning in LA SALLE, ILLINOIS
From 06-JUL-03 13:35:00 to 06-JUL-03 13:35:00 (CST)
Location: OTTAWA
Reported by: NEWSPAPER

Hail in LAKE, ILLINOIS
From 06-JUL-03 14:15:00 to 06-JUL-03 14:20:00 (CST)
Location: LAKE BLUFF
Magnitude: 1.75 
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in COOK, ILLINOIS
From 06-JUL-03 14:15:00 to 06-JUL-03 14:15:00 (CST)
Location: LEMONT
Magnitude: 50 EG
Reported by: GENERAL PUBLIC

Hail in DU PAGE, ILLINOIS
From 06-JUL-03 16:17:00 to 06-JUL-03 16:30:00 (CST)
Location: BLOOMINGDALE
Magnitude: 2.00 
Reported by: TRAINED SPOTTER

Hail in COOK, ILLINOIS
From 06-JUL-03 17:00:00 to 06-JUL-03 17:15:00 (CST)
Location: CICERO
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Hail in COOK, ILLINOIS
From 06-JUL-03 17:26:00 to 06-JUL-03 17:31:00 (CST)
Location: CHICAGO
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Thunderstorm Wind in COOK, ILLINOIS
From 06-JUL-03 17:45:00 to 06-JUL-03 17:45:00 (CST)
Location: ORLAND PARK
Magnitude: 50 EG
Reported by: LAW ENFORCEMENT

Hail in IROQUOIS, ILLINOIS
From 06-JUL-03 17:15:00 to 06-JUL-03 17:20:00 (CST)
Location: ASHKUM
Magnitude: 0.88 
Reported by: LAW ENFORCEMENT

Hail in KANKAKEE, ILLINOIS
From 06-JUL-03 11:39:00 to 06-JUL-03 11:44:00 (CST)
Location: KANKAKEE
Magnitude: 1.00 
Reported by: LAW ENFORCEMENT

Hail in KANKAKEE, ILLINOIS
From 06-JUL-03 12:07:00 to 06-JUL-03 12:12:00 (CST)
Location: REDDICK
Magnitude: 1.75 
Reported by: AMATEUR RADIO

Hail in KANKAKEE, ILLINOIS
From 06-JUL-03 12:30:00 to 06-JUL-03 12:50:00 (CST)
Location: KANKAKEE
Magnitude: 0.75 
Reported by: AMATEUR RADIO

Hail in MCHENRY, ILLINOIS
From 06-JUL-03 12:55:00 to 06-JUL-03 13:10:00 (CST)
Location: WOODSTOCK
Magnitude: 1.00 
Reported by: OFFICIAL NWS OBS.

Hail in GRUNDY, ILLINOIS
From 06-JUL-03 13:23:00 to 06-JUL-03 13:33:00 (CST)
Location: MORRIS
Magnitude: 0.88 
Reported by: EMERGENCY MANAGER

Hail in LA SALLE, ILLINOIS
From 06-JUL-03 13:33:00 to 06-JUL-03 13:38:00 (CST)
Location: OTTAWA
Magnitude: 1.75 
Reported by: GENERAL PUBLIC

Hail in COOK, ILLINOIS
From 06-JUL-03 12:59:00 to 06-JUL-03 13:06:00 (CST)
Location: ARLINGTON HGTS
Magnitude: 1.75 
Reported by: TRAINED SPOTTER

Arlington Heights and Dundee Road and at Milwaukee and Dundee Road.

Hail in LAKE, ILLINOIS
From 06-JUL-03 13:02:00 to 06-JUL-03 13:09:00 (CST)
Location: BUFFALO GROVE
Magnitude: 1.75 
Reported by: AMATEUR RADIO

Lake Cook Road.

Thunderstorm Wind in LAKE, ILLINOIS
From 06-JUL-03 13:20:00 to 06-JUL-03 13:20:00 (CST)
Location: DEERFIELD
Magnitude: 50 EG
Reported by: GENERAL PUBLIC

Hail in LAKE, ILLINOIS
From 06-JUL-03 13:30:00 to 06-JUL-03 13:42:00 (CST)
Location: DEERFIELD
Magnitude: 1.75 
Reported by: GENERAL PUBLIC

Gilmer and Fairfield in Wauconda.

Hail in LA SALLE, ILLINOIS
From 06-JUL-03 13:48:00 to 06-JUL-03 13:53:00 (CST)
Location: MARSEILLES
Magnitude: 0.75 
Reported by: NWS EMPLOYEE(OFF DUTY)

Hail in LA SALLE, ILLINOIS
From 06-JUL-03 13:57:00 to 06-JUL-03 14:02:00 (CST)
Location: OTTAWA
Magnitude: 0.75 
Reported by: AMATEUR RADIO

Thunderstorm Wind in LA SALLE, ILLINOIS
From 06-JUL-03 13:33:00 to 06-JUL-03 13:38:00 (CST)
Location: OTTAWA
Magnitude: 52 EG
Reported by: AMATEUR RADIO

Hail in GRUNDY, ILLINOIS
From 06-JUL-03 13:53:00 to 06-JUL-03 14:10:00 (CST)
Location: MAZON
Magnitude: 1.00 
Reported by: AMATEUR RADIO

Hail in WILL, ILLINOIS
From 06-JUL-03 13:55:00 to 06-JUL-03 14:10:00 (CST)
Location: PLAINFIELD
Magnitude: 1.25 
Reported by: TRAINED SPOTTER

Hail in WILL, ILLINOIS
From 06-JUL-03 14:00:00 to 06-JUL-03 14:13:00 (CST)
Location: WILMINGTON
Magnitude: 1.00 
Reported by: LAW ENFORCEMENT

Hail in KANKAKEE, ILLINOIS
From 06-JUL-03 14:10:00 to 06-JUL-03 14:15:00 (CST)
Location: ESSEX
Magnitude: 1.75 
Reported by: AMATEUR RADIO