Several supercell thunderstorms moved across northern Illinois during the evening hours of May 30th.  Several tornadoes formed with these supercells with the strongest tornadoes and most extensive damage across Joliet and Lockport in Will counties.  In addition to the tornadoes, wind damage was also reported across the area.  Trees were blown down in Silver Springs State Park west of Yorkville in Kendall county.  Trees and power lines were reported down in Somonauk in Dekalb county.  Several trees and power lines were blown down near Lake Holiday in far northwest La Salle county and windows were blown out of some mobile homes near the Lake Holiday area.  Large trees and power lines were blown down from Plainfield to Joliet.  One tree fell onto a house.  A gust to 80 mph was reported between Central Ave and Cicero Ave near 53rd in Chicago.  Trees were reported down in Manteno in Kankakee county.  Tree limbs were blown down across parts of McHenry county.  In Paxton in Ford county, high winds damaged a farm shed, causing the roof to fall onto a tractor.  A large tree fell onto a van, causing significant damage and the roof of a grain bin was damaged.

Tornado in KENDALL, ILLINOIS
From 30-MAY-03 18:42:00 to 30-MAY-03 18:47:00 (CST)
Location: MILLINGTON
Tornado F-scale: F0
Reported by: NWS STORM SURVEY

A tornado touched down about 3.5 miles east-northeast of Millington.  A tree was damaged at Hollenback Road and Route 71.  A large tree was snapped at Walker Road and Helmar Road.  A large farm building collapased just south of Walker Road and east of Lisbon Road.  The tornado lifted about 5 miles south-southwest of Yorkville.

Thunderstorm Wind in KENDALL, ILLINOIS
From 30-MAY-03 18:40:00 to 30-MAY-03 18:40:00 (CST)
Location: YORKVILLE
Magnitude: 60 EG
Reported by: LAW ENFORCEMENT

Tornado in LA SALLE, ILLINOIS
From 30-MAY-03 18:35:00 to 30-MAY-03 18:38:00 (CST)
Location: SHERIDAN
Tornado F-scale: F0
Reported by: NWS STORM SURVEY

A tornado touched down about 3 miles northwest of Millington (5.5 miles north-northeast of Sheridan) near County Roads 2900 East and 4550 North.  The tornado caused damage to outbuildings and trees at 2 farms.  Barn debris was spread across a field.  The tornado crossed the border into Kendall county about 2.5 miles north of Millington (6.5 miles northeast of Sheridan).

Thunderstorm Wind in DE KALB, ILLINOIS
From 30-MAY-03 18:08:00 to 30-MAY-03 18:08:00 (CST)
Location: DE KALB
Magnitude: 65 EG
Reported by: LAW ENFORCEMENT

A troopers car was lifted and and moved by high winds at Interstate 88 and Route 72.

Tornado in WILL, ILLINOIS
From 30-MAY-03 19:25:00 to 30-MAY-03 19:32:00 (CST)
Location: JOLIET
Tornado F-scale: F1
Property damage: 60K
Reported by: NWS STORM SURVEY

A second tornado touched down two miles north of downtown Joliet, near the Des Plaines River, about a half mile south of Bruce Road.  The tornado continued east and lifted about four miles southeast of Lockport near Cedar and Bruce Roads.  The tornado severely damaged commercial buildings on Route 171 south of Bruce Road.  It ripped apart cinder block and metal buildings and some of the debris was deposited over 100 yards away.  A house one the east side of 171 was damaged.  Tree limbs were blown down in the Fairmont neighborhood.  Outbuildings were damaged on Briggs street near Oak Street.  There was also tree damage eastward to a subdivision south of Bruce Street west of Cedar Road.

Tornado in LEE, ILLINOIS
From 30-MAY-03 17:36:00 to 30-MAY-03 17:43:00 (CST)
Location: FRANKLIN GROVE
Tornado F-scale: F0
Reported by: STORM CHASER

A tornado touched down 2 miles southeast of Franklin Grove near County Road 1700 North and Pine Hill Road.  It continued east southeast for about 4 miles to near Middlebury Road, south of 1700 North.  Tree damage was reported at a couple farms.

Tornado in KENDALL, ILLINOIS
From 30-MAY-03 18:38:00 to 30-MAY-03 18:40:00 (CST)
Location: MILLINGTON
Tornado F-scale: F0
Reported by: NWS STORM SURVEY

A tornado touched down about 3 miles northwest of Millington in LaSalle county at 735 pm.  The tornado crossed the LaSalle/Kendall county line at 838pm, about 2.5 miles north of Millington.  The tornado continued east for about one mile and lifted about 3 miles north-northeast of Millington at Finnie Road near the Fox River.  Total path length was about 2.5 miles.

Tornado in WILL, ILLINOIS
From 30-MAY-03 19:31:00 to 30-MAY-03 19:32:00 (CST)
Location: WILMINGTON
Tornado F-scale: F0
Reported by: TRAINED SPOTTER

A weak tornado touched down in a field about 2 miles east of Wilmington near Old Chicago Road.  No damage was reported.

Hail in MCHENRY, ILLINOIS
From 30-MAY-03 18:25:00 to 30-MAY-03 18:25:00 (CST)
Location: WOODSTOCK
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Thunderstorm Wind in COOK, ILLINOIS
From 30-MAY-03 19:47:00 to 30-MAY-03 19:47:00 (CST)
Location: CHICAGO
Magnitude: 70 MG
Reported by: LAW ENFORCEMENT

Tornado in WINNEBAGO, ILLINOIS
From 30-MAY-03 17:25:00 to 30-MAY-03 17:26:00 (CST)
Location: SHIRLAND
Tornado F-scale: F0
Reported by: TRAINED SPOTTER

A tornado dissipated near the Sugar River just north of the state line in Rock County, Wisconsin. The parent thunderstorm produced another brief tornado in far northern Winnebago county. A spotter observed the tornado north of Shirland but there was no damage.

Thunderstorm Wind in WILL, ILLINOIS
From 30-MAY-03 19:10:00 to 30-MAY-03 19:20:00 (CST)
Location: PLAINFIELD
Magnitude: 65 EG
Reported by: NWS EMPLOYEE(OFF DUTY)

Tornado in KANKAKEE, ILLINOIS
From 30-MAY-03 19:34:00 to 30-MAY-03 19:37:00 (CST)
Location: DESELM
Tornado F-scale: F0
Reported by: LAW ENFORCEMENT

A weak tornado touched down near Warner Bridge Road along the Will/Kankakee line.  The tornado remained mainly in fields and did no damage. The tornado was observed and videotaped by a Kankakee police Sgt. and by a resident in Deselm.

Tornado in WINNEBAGO, ILLINOIS
From 30-MAY-03 17:33:00 to 30-MAY-03 17:41:00 (CST)
Location: ROCKTON
Tornado F-scale: F0
Reported by: TRAINED SPOTTER

A tornado touched down west of Rockton near the bend in the Rock River and continued southeast, and lifted northwest of Roscoe.  A gas station near 151 and Elevator Road had damage to glass and a wall.  No other damage was reported.

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 30-MAY-03 19:53:00 to 30-MAY-03 19:53:00 (CST)
Location: MANTENO
Magnitude: 55 EG
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in LAKE, ILLINOIS
From 30-MAY-03 18:55:00 to 30-MAY-03 18:55:00 (CST)
Location: FOX LAKE
Magnitude: 63 MG
Reported by: TRAINED SPOTTER

Thunderstorm Wind in LA SALLE, ILLINOIS
From 30-MAY-03 18:35:00 to 30-MAY-03 18:40:00 (CST)
Location: SHERIDAN
Magnitude: 65 EG
Reported by: TRAINED SPOTTER

Hail in LA SALLE, ILLINOIS
From 30-MAY-03 19:00:00 to 30-MAY-03 19:00:00 (CST)
Location: STREATOR
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Tornado in WILL, ILLINOIS
From 30-MAY-03 19:20:00 to 30-MAY-03 19:23:00 (CST)
Location: JOLIET
Tornado F-scale: F1
Reported by: NWS STORM SURVEY

A tornado touched down on the west side of Joliet from the Dupage River, one half mile north of Black Road to near Ingalls and Gael Roads, about five miles northwest of downtown Joliet.  The tornado broke tree limbs and uprooted a couple of trees in subdivisions between Frontage Road along Interstate 55 and Essington Roads.  A garage was damaged and roofs of some homes were damaged.  An apartment building roof was torn off north of Ingalls Street, east of Essington Road.

Tornado in COOK, ILLINOIS
From 30-MAY-03 19:30:00 to 30-MAY-03 19:31:00 (CST)
Location: LEMONT
Tornado F-scale: F0
Reported by: TRAINED SPOTTER

A weak tornado touched down near Route 83 and Archer Roads in the Forest Preserve.  No damage was reported.

Thunderstorm Wind in FORD, ILLINOIS
From 30-MAY-03 20:20:00 to 30-MAY-03 20:20:00 (CST)
Location: PAXTON
Magnitude: 65 EG
Reported by: NEWSPAPER

Hail in LEE, ILLINOIS
From 30-MAY-03 18:10:00 to 30-MAY-03 18:10:00 (CST)
Location: PAW PAW
Magnitude: 0.88 
Reported by: GENERAL PUBLIC

Thunderstorm Wind in DE KALB, ILLINOIS
From 30-MAY-03 18:30:00 to 30-MAY-03 18:30:00 (CST)
Location: SOMONAUK
Magnitude: 50 EG
Reported by: GENERAL PUBLIC

Tornado in LA SALLE, ILLINOIS
From 30-MAY-03 18:16:00 to 30-MAY-03 18:17:00 (CST)
Location: PERU
Tornado F-scale: F0
Reported by: GENERAL PUBLIC

A weak tornado touched down about two miles north of Peru and lasted one minute.  Some debris was reported along Route 251.