Severe thunderstorms developed during the early afternoon hours of August 1st across the Chicago Metro Area.  The storms produced dozens of reports of large hail as well as wind damage.  Minor hail damage was reported to roofs and house trim in Streamwood.  A large tree was blown down on Madelyn Drive in Des Plaines.  Tree limbs were blown down in Bloomingdale and trees were blown down in Lombard, where one tree fell onto a house.  Tree limbs were blown down in Elmhurst and trees and large limbs were blown down in Glen Ellyen, both in Dupage county.  Several trees were blown down on the south side of the city of Chicago.  A two foot diameter tree limb was blown down in Worth in Cook county.  The tree limb  destroyed a camper.  Winds gusted to 70 mph in Lansing where many trees were blown down and a barn was destroyed.  A wind gust to 60 mph was reported in Marseilles and large tree limbs were blown down in Seneca, both in LaSalle county.  Tree limbs were blown down in Bolingbrook and trees were blown down in Channahon, both in Will county.  A roof of a stage was blown down at the Joliet race track where the stage was being built for a concert.  Trees, large tree limbs and power lines were blown down across many parts of Grundy county.  Power lines were blown down in Leland in LaSalle county.  In addition to the hail and wind damage, flooding was also reported across Route 47 in Morris and parts of Grundy county received 2 to 3 inches of rain.  Minor flooding was reported across parts of Kane, Dupage and Cook counites as well.

Hail in KANE, ILLINOIS
From 01-AUG-03 13:48:00 to 01-AUG-03 13:53:00 (CST)
Location: ELGIN
Magnitude: 1.00 
Reported by: EMERGENCY MANAGER

Reported at US Route 20 and Illinois Route 31.

Hail in COOK, ILLINOIS
From 01-AUG-03 14:38:00 to 01-AUG-03 14:42:00 (CST)
Location: DES PLAINES
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in DU PAGE, ILLINOIS
From 01-AUG-03 14:52:00 to 01-AUG-03 14:57:00 (CST)
Location: BENSENVILLE
Magnitude: 0.88 
Reported by: LAW ENFORCEMENT

Reported along Irving Park Road.

Hail in LAKE, ILLINOIS
From 01-AUG-03 12:15:00 to 01-AUG-03 12:20:00 (CST)
Location: LONG GROVE
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in DU PAGE, ILLINOIS
From 01-AUG-03 14:40:00 to 01-AUG-03 14:50:00 (CST)
Location: ROSELLE
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Hail in COOK, ILLINOIS
From 01-AUG-03 12:28:00 to 01-AUG-03 12:40:00 (CST)
Location: ROLLING MEADOWS
Magnitude: 1.00 
Reported by: GENERAL PUBLIC

Reported at Algonquin Road and Route 53.

Hail in COOK, ILLINOIS
From 01-AUG-03 12:45:00 to 01-AUG-03 12:50:00 (CST)
Location: SCHAUMBURG
Magnitude: 1.75 
Reported by: LAW ENFORCEMENT

Golf ball size hail was reported at Golf and Algonquin Roads.

Thunderstorm Wind in COOK, ILLINOIS
From 01-AUG-03 12:45:00 to 01-AUG-03 12:45:00 (CST)
Location: DES PLAINES
Magnitude: 52 EG
Reported by: GENERAL PUBLIC

Hail in COOK, ILLINOIS
From 01-AUG-03 12:25:00 to 01-AUG-03 12:35:00 (CST)
Location: SCHAUMBURG
Magnitude: 1.00 
Reported by: GENERAL PUBLIC

Reported at Golf and Meacham Roads and also along Interstate 90.

Hail in COOK, ILLINOIS
From 01-AUG-03 12:27:00 to 01-AUG-03 12:32:00 (CST)
Location: STREAMWOOD
Magnitude: 1.00 
Reported by: GENERAL PUBLIC

Hail in COOK, ILLINOIS
From 01-AUG-03 14:49:00 to 01-AUG-03 14:54:00 (CST)
Location: ELK GROVE VLG
Magnitude: 1.75 
Reported by: AMATEUR RADIO

Golf ball size hail was reported at Elmhurst and Touhy Roads.

Hail in COOK, ILLINOIS
From 01-AUG-03 14:45:00 to 01-AUG-03 14:55:00 (CST)
Location: STREAMWOOD
Magnitude: 0.75 
Reported by: AMATEUR RADIO

Hail in COOK, ILLINOIS
From 01-AUG-03 14:20:00 to 01-AUG-03 14:30:00 (CST)
Location: SCHAUMBURG
Magnitude: 1.75 
Reported by: TRAINED SPOTTER

Hail ranged from the size of quarters to golf balls and covered the ground in some areas.

Hail in COOK, ILLINOIS
From 01-AUG-03 12:32:00 to 01-AUG-03 12:37:00 (CST)
Location: ARLINGTON HGTS
Magnitude: 1.00 
Reported by: AMATEUR RADIO

Reported at Golf and Arlington Heights Roads.

Hail in COOK, ILLINOIS
From 01-AUG-03 12:44:00 to 01-AUG-03 13:00:00 (CST)
Location: MT PROSPECT
Magnitude: 1.00 
Reported by: EMERGENCY MANAGER

Hail in COOK, ILLINOIS
From 01-AUG-03 12:47:00 to 01-AUG-03 12:52:00 (CST)
Location: ARLINGTON HGTS
Magnitude: 1.25 
Reported by: AMATEUR RADIO

Reported at Algonquin and Dempster Roads.

Hail in COOK, ILLINOIS
From 01-AUG-03 14:01:00 to 01-AUG-03 14:06:00 (CST)
Location: HANOVER PARK
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Reported at Barrington and Irving Park Roads.

Hail in COOK, ILLINOIS
From 01-AUG-03 14:26:00 to 01-AUG-03 14:31:00 (CST)
Location: HANOVER PARK
Magnitude: 1.75 
Reported by: TRAINED SPOTTER

Golf ball size hail was reported at Barrington Road and Highway 20.

Hail in COOK, ILLINOIS
From 01-AUG-03 14:19:00 to 01-AUG-03 14:27:00 (CST)
Location: STREAMWOOD
Magnitude: 1.75 
Reported by: GENERAL PUBLIC

Hail in COOK, ILLINOIS
From 01-AUG-03 14:00:00 to 01-AUG-03 14:05:00 (CST)
Location: STREAMWOOD
Magnitude: 1.00 
Reported by: GENERAL PUBLIC

Hail in DU PAGE, ILLINOIS
From 01-AUG-03 14:30:00 to 01-AUG-03 14:35:00 (CST)
Location: HANOVER PARK
Magnitude: 1.75 
Reported by: GENERAL PUBLIC

Hail in COOK, ILLINOIS
From 01-AUG-03 14:25:00 to 01-AUG-03 14:30:00 (CST)
Location: ARLINGTON HGTS
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in COOK, ILLINOIS
From 01-AUG-03 14:30:00 to 01-AUG-03 14:35:00 (CST)
Location: BARTLETT
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Quarter size hail was reported covering the ground.

Hail in KANE, ILLINOIS
From 01-AUG-03 13:59:00 to 01-AUG-03 14:08:00 (CST)
Location: ELGIN
Magnitude: 1.75 
Reported by: AMATEUR RADIO

Golf ball size hail in downtown Elgin and along Randall Road near St. Joseph Hospital.

Hail in COOK, ILLINOIS
From 01-AUG-03 12:40:00 to 01-AUG-03 12:50:00 (CST)
Location: DES PLAINES
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Hail in DU PAGE, ILLINOIS
From 01-AUG-03 15:10:00 to 01-AUG-03 15:20:00 (CST)
Location: BLOOMINGDALE
Magnitude: 1.00 
Reported by: GENERAL PUBLIC

Hail in DU PAGE, ILLINOIS
From 01-AUG-03 15:55:00 to 01-AUG-03 16:00:00 (CST)
Location: DOWNERS GROVE
Magnitude: 0.75 
Reported by: GENERAL PUBLIC

Hail in DU PAGE, ILLINOIS
From 01-AUG-03 15:13:00 to 01-AUG-03 15:18:00 (CST)
Location: WHEATON
Magnitude: 0.88 
Reported by: AMATEUR RADIO

Reported at Gary Avenue and Geneva Street.

Hail in KENDALL, ILLINOIS
From 01-AUG-03 15:58:00 to 01-AUG-03 16:00:00 (CST)
Location: OSWEGO
Magnitude: 1.00 
Reported by: EMERGENCY MANAGER

Reported at the intersection of US 30 and US 34.

Hail in DU PAGE, ILLINOIS
From 01-AUG-03 15:23:00 to 01-AUG-03 15:28:00 (CST)
Location: GLENDALE HGTS
Magnitude: 1.75 
Reported by: AMATEUR RADIO

Golf ball size hail was reported at Interstate 355 and North Avenue.

Hail in COOK, ILLINOIS
From 01-AUG-03 14:53:00 to 01-AUG-03 14:56:00 (CST)
Location: (ORD)O'HARE INTL ARP
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Flash Flood in GRUNDY, ILLINOIS
From 01-AUG-03 16:12:00 to 01-AUG-03 19:00:00 (CST)
Location: MORRIS
Reported by: TRAINED SPOTTER

Hail in COOK, ILLINOIS
From 01-AUG-03 16:08:00 to 01-AUG-03 16:12:00 (CST)
Location: CICERO
Magnitude: 1.00 
Reported by: GENERAL PUBLIC

Thunderstorm Wind in WILL, ILLINOIS
From 01-AUG-03 16:10:00 to 01-AUG-03 16:15:00 (CST)
Location: CHANNAHON
Magnitude: 57 EG
Reported by: NWS EMPLOYEE(OFF DUTY)

Thunderstorm Wind in COOK, ILLINOIS
From 01-AUG-03 16:15:00 to 01-AUG-03 16:15:00 (CST)
Location: WORTH
Magnitude: 57 EG
Reported by: NEWSPAPER

Thunderstorm Wind in DU PAGE, ILLINOIS
From 01-AUG-03 16:54:00 to 01-AUG-03 16:54:00 (CST)
Location: GLEN ELLYN
Magnitude: 52 EG
Reported by: TRAINED SPOTTER

Hail in WILL, ILLINOIS
From 01-AUG-03 16:30:00 to 01-AUG-03 16:35:00 (CST)
Location: MANHATTAN
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Hail in COOK, ILLINOIS
From 01-AUG-03 13:10:00 to 01-AUG-03 13:15:00 (CST)
Location: STREAMWOOD
Magnitude: 1.25 
Reported by: GENERAL PUBLIC

Thunderstorm Wind in LA SALLE, ILLINOIS
From 01-AUG-03 17:15:00 to 01-AUG-03 17:15:00 (CST)
Location: LELAND
Magnitude: 50 EG
Reported by: LAW ENFORCEMENT

Hail in KENDALL, ILLINOIS
From 01-AUG-03 16:15:00 to 01-AUG-03 16:20:00 (CST)
Location: BOULDER HILL
Magnitude: 0.88 
Reported by: AMATEUR RADIO

Reported along Route 125.

Hail in COOK, ILLINOIS
From 01-AUG-03 16:15:00 to 01-AUG-03 16:20:00 (CST)
Location: EVERGREEN PARK
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Hail in WILL, ILLINOIS
From 01-AUG-03 15:45:00 to 01-AUG-03 15:50:00 (CST)
Location: BOLINGBROOK
Magnitude: 1.00 
Reported by: EMERGENCY MANAGER

Reported at Route 53 and Montrose Roads.

Hail in KANE, ILLINOIS
From 01-AUG-03 15:15:00 to 01-AUG-03 15:20:00 (CST)
Location: AURORA
Magnitude: 0.75 
Reported by: GENERAL PUBLIC

Reported along Fifth Avenue.

Hail in WILL, ILLINOIS
From 01-AUG-03 16:15:00 to 01-AUG-03 16:20:00 (CST)
Location: CREST HILL
Magnitude: 0.75 
Reported by: GENERAL PUBLIC

Reported at Weber and Renwick Roads.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 01-AUG-03 16:00:00 to 01-AUG-03 16:00:00 (CST)
Location: SENECA
Magnitude: 52 EG
Reported by: AMATEUR RADIO

Hail in DU PAGE, ILLINOIS
From 01-AUG-03 16:30:00 to 01-AUG-03 16:35:00 (CST)
Location: ELMHURST
Magnitude: 0.75 
Reported by: GENERAL PUBLIC

Hail in DU PAGE, ILLINOIS
From 01-AUG-03 16:29:00 to 01-AUG-03 16:33:00 (CST)
Location: CLARENDON HILLS
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Thunderstorm Wind in DU PAGE, ILLINOIS
From 01-AUG-03 16:30:00 to 01-AUG-03 16:30:00 (CST)
Location: ELMHURST
Magnitude: 52 EG
Reported by: GENERAL PUBLIC

Thunderstorm Wind in WILL, ILLINOIS
From 01-AUG-03 15:45:00 to 01-AUG-03 15:45:00 (CST)
Location: BOLINGBROOK
Magnitude: 50 EG
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in LA SALLE, ILLINOIS
From 01-AUG-03 15:42:00 to 01-AUG-03 15:42:00 (CST)
Location: MARSEILLES
Magnitude: 52 EG
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in DU PAGE, ILLINOIS
From 01-AUG-03 15:42:00 to 01-AUG-03 15:42:00 (CST)
Location: ELMHURST
Magnitude: 50 EG
Reported by: TRAINED SPOTTER

Hail in COOK, ILLINOIS
From 01-AUG-03 14:45:00 to 01-AUG-03 14:55:00 (CST)
Location: FRANKLIN PARK
Magnitude: 0.75 
Reported by: AMATEUR RADIO

Thunderstorm Wind in DU PAGE, ILLINOIS
From 01-AUG-03 15:22:00 to 01-AUG-03 15:30:00 (CST)
Location: LOMBARD
Magnitude: 57 EG
Reported by: TRAINED SPOTTER

Hail in WILL, ILLINOIS
From 01-AUG-03 15:32:00 to 01-AUG-03 15:38:00 (CST)
Location: ROMEOVILLE
Magnitude: 1.00 
Reported by: METEOROLOGIST(NON NWS)

Quarter size hail was reported at Airport and Weber Roads and at Weber and 135th Street.

Hail in KANE, ILLINOIS
From 01-AUG-03 15:15:00 to 01-AUG-03 15:20:00 (CST)
Location: MONTGOMERY
Magnitude: 0.75 
Reported by: GENERAL PUBLIC

Thunderstorm Wind in DU PAGE, ILLINOIS
From 01-AUG-03 15:20:00 to 01-AUG-03 15:20:00 (CST)
Location: BLOOMINGDALE
Magnitude: 50 EG
Reported by: GENERAL PUBLIC

Hail in WILL, ILLINOIS
From 01-AUG-03 16:30:00 to 01-AUG-03 16:35:00 (CST)
Location: NAPERVILLE
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Thunderstorm Wind in GRUNDY, ILLINOIS
From 01-AUG-03 16:05:00 to 01-AUG-03 16:05:00 (CST)
Location: MORRIS MUNI ARPT
Magnitude: 56 MG
Reported by: AWOS,ASOS,MESONET,ETC

The Morris AWOS measured a gust to 56 knots, 64 mph.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 01-AUG-03 15:50:00 to 01-AUG-03 16:15:00 (CST)
Location: COUNTYWIDE
Magnitude: 61 EG
Reported by: TRAINED SPOTTER

Hail in GRUNDY, ILLINOIS
From 01-AUG-03 16:02:00 to 01-AUG-03 16:07:00 (CST)
Location: MORRIS
Magnitude: 1.00 
Reported by: AMATEUR RADIO

Reported at Route 47 and US 6.

Hail in LA SALLE, ILLINOIS
From 01-AUG-03 15:42:00 to 01-AUG-03 15:45:00 (CST)
Location: MARSEILLES
Magnitude: 1.00 
Reported by: LAW ENFORCEMENT

Hail in LAKE, ILLINOIS
From 01-AUG-03 17:23:00 to 01-AUG-03 17:28:00 (CST)
Location: WADSWORTH
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Reported at US 41 and Illinois Route 173.

Thunderstorm Wind in COOK, ILLINOIS
From 01-AUG-03 16:52:00 to 01-AUG-03 16:52:00 (CST)
Location: LANSING
Magnitude: 61 EG
Reported by: LAW ENFORCEMENT

Hail in DU PAGE, ILLINOIS
From 01-AUG-03 15:22:00 to 01-AUG-03 15:30:00 (CST)
Location: LOMBARD
Magnitude: 1.75 
Reported by: TRAINED SPOTTER

Hail ranged from the size of pennies at Illinois Route 64 and Route 53 to golf ball size hail along Main Street.

Thunderstorm Wind in COOK, ILLINOIS
From 01-AUG-03 15:30:00 to 01-AUG-03 15:35:00 (CST)
Location: CHICAGO
Magnitude: 57 EG
Reported by: GOVT OFFICIAL