The morning of May 30 started out with a line of showers and thunderstorms moving into north-central Illinois.  Other thunderstorms developed over portions of east central Illinois and northwest Indiana. The major threat was heavy rain which produced widespread street flooding.  There were also reports of thunderstorm wind damage.  The line of thunderstorms continued to march east through northeast Illinois and northwest Indiana and by early afternoon the line had pushed east of the region.  By mid afternoon a second line of thunderstorms crossed the Mississippi river into western Illinois and other storms developed over east central Illinois and northwest Indiana. The storms continued to move through the area into early evening.   The two lines of thunderstorms produced widespread tree damage.  There were also a few reports of lightning damage associated with these storms.  Flash flooding was a serious problem as a considerable amount of rain had fallen recently in addition to heavy rains associated with these storms.  The storms produced several weak tornadoes over Livingston County Illinois.

Thunderstorm Wind in FORD, ILLINOIS
From 30-MAY-04 17:50:00 to 30-MAY-04 17:50:00 (CST)
Location: GIBSON CITY
Magnitude: 55 EG
Reported by: EMERGENCY MANAGER

Tree limbs were down.  A drive-in movie theater movie screen was damaged and signs were blown down.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 30-MAY-04 17:51:00 to 30-MAY-04 17:51:00 (CST)
Location: COAL CITY
Magnitude: 50 EG
Reported by: GENERAL PUBLIC

Tree limbs and power lines were down.

Thunderstorm Wind in COOK, ILLINOIS
From 30-MAY-04 18:10:00 to 30-MAY-04 18:10:00 (CST)
Location: STREAMWOOD
Magnitude: 50 EG
Reported by: GENERAL PUBLIC

Trees, tree limbs and power lines were down.

Thunderstorm Wind in WILL, ILLINOIS
From 30-MAY-04 18:00:00 to 30-MAY-04 18:00:00 (CST)
Location: JOLIET
Magnitude: 50 EG
Reported by: EMERGENCY MANAGER

Power poles were blown down.

Thunderstorm Wind in DU PAGE, ILLINOIS
From 30-MAY-04 18:00:00 to 30-MAY-04 18:00:00 (CST)
Location: LOMBARD
Magnitude: 50 EG
Reported by: EMERGENCY MANAGER

Trees were blown down.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 30-MAY-04 17:45:00 to 30-MAY-04 17:45:00 (CST)
Location: OTTAWA
Magnitude: 50 EG
Reported by: TRAINED SPOTTER

Trees were blown down at the water tower.

Thunderstorm Wind in KENDALL, ILLINOIS
From 30-MAY-04 17:38:00 to 30-MAY-04 17:38:00 (CST)
Location: YORKVILLE
Magnitude: 53 EG
Reported by: EMERGENCY MANAGER

Trees and tree limbs were blown down at the Kendall County Government Center at the intersection of Route 34 and Cannonball Road.

Thunderstorm Wind in KENDALL, ILLINOIS
From 30-MAY-04 17:41:00 to 30-MAY-04 17:41:00 (CST)
Location: PLANO
Magnitude: 50 EG
Reported by: EMERGENCY MANAGER

A tree was down on a car with a person trapped inside.

Thunderstorm Wind in IROQUOIS, ILLINOIS
From 30-MAY-04 17:05:00 to 30-MAY-04 17:05:00 (CST)
Location: CRESCENT CITY
Magnitude: 50 EG
Reported by: TRAINED SPOTTER

Silos were damaged north of town.

Flash Flood in LA SALLE, ILLINOIS
From 30-MAY-04 17:45:00 to 30-MAY-04 18:45:00 (CST)
Location: MENDOTA
Reported by: NWS EMPLOYEE(OFF DUTY)

Street flooding was reported and creeks overflowed their banks. A total of 1.5 inches of rain fell in 1 hour and 45 minutes.

Hail in KANKAKEE, ILLINOIS
From 30-MAY-04 17:37:00 to 30-MAY-04 17:42:00 (CST)
Location: REDDICK
Magnitude: 0.75 
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in LIVINGSTON, ILLINOIS
From 30-MAY-04 17:25:00 to 30-MAY-04 17:25:00 (CST)
Location: PONTIAC
Magnitude: 55 EG
Reported by: TRAINED SPOTTER

Trees were uprooted.

Thunderstorm Wind in KANE, ILLINOIS
From 30-MAY-04 18:05:00 to 30-MAY-04 18:05:00 (CST)
Location: CARPENTERSVILLE
Magnitude: 55 MG
Reported by: TRAINED SPOTTER

A wind gust measured with unoffical equipment. Also, trees were blown down.

Thunderstorm Wind in DE KALB, ILLINOIS
From 30-MAY-04 17:25:00 to 30-MAY-04 17:25:00 (CST)
Location: DE KALB
Magnitude: 55 EG
Reported by: TRAINED SPOTTER

Trees were snapped off south of Bethany Road and west of State Road 23.  Tree branches were down north of Route 38.  A shopping center under construction on the north side of De Kalb was damaged.

Thunderstorm Wind in FORD, ILLINOIS
From 30-MAY-04 17:50:00 to 30-MAY-04 17:50:00 (CST)
Location: PIPER CITY
Magnitude: 60 EG
Reported by: NWS STORM SURVEY

Downburst winds damaged large trees in northern Ford County at County Roads 1300 East and 3400 North.  This is about 2.5 miles northeast of Cullom.

Thunderstorm Wind in KANE, ILLINOIS
From 30-MAY-04 18:00:00 to 30-MAY-04 18:00:00 (CST)
Location: BATAVIA
Magnitude: 50 EG
Reported by: EMERGENCY MANAGER

Trees were blown down.

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 30-MAY-04 18:10:00 to 30-MAY-04 18:10:00 (CST)
Location: BONFIELD
Magnitude: 50 EG
Reported by: EMERGENCY MANAGER

A large tree was blown down.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 30-MAY-04 18:30:00 to 30-MAY-04 18:30:00 (CST)
Location: COAL CITY
Magnitude: 50 EG
Reported by: GENERAL PUBLIC

Trees were blown down.

Thunderstorm Wind in KENDALL, ILLINOIS
From 30-MAY-04 17:40:00 to 30-MAY-04 17:45:00 (CST)
Location: COUNTYWIDE
Magnitude: 50 EG
Reported by: EMERGENCY MANAGER

Trees and tree limbs were blown down.  Also, trees were down at campground east of Millbrook. Tree limbs were down on a power line in Yorkville.  A tree was down on a car in Little Rock. Another tree was down on a power line 3 miles south of Plano.

Thunderstorm Wind in MCHENRY, ILLINOIS
From 30-MAY-04 18:25:00 to 30-MAY-04 18:25:00 (CST)
Location: CARY
Magnitude: 50 EG
Reported by: GENERAL PUBLIC

Large tree limbs were blown down.

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 30-MAY-04 18:25:00 to 30-MAY-04 18:25:00 (CST)
Location: AROMA PARK
Magnitude: 50 EG
Reported by: EMERGENCY MANAGER

Several trees were blown down south and east of Aroma Park.

Thunderstorm Wind in COOK, ILLINOIS
From 30-MAY-04 18:44:00 to 30-MAY-04 18:44:00 (CST)
Location: CHICAGO
Magnitude: 50 EG
Reported by: GENERAL PUBLIC

Large tree limbs were blown down and shingles were blown off a roof at 54th Street and Kedvale Road.

Thunderstorm Wind in IROQUOIS, ILLINOIS
From 30-MAY-04 18:48:00 to 30-MAY-04 18:48:00 (CST)
Location: CRESCENT CITY
Magnitude: 55 EG
Reported by: GENERAL PUBLIC

Towers and antennas were bent.

Thunderstorm Wind in WILL, ILLINOIS
From 30-MAY-04 18:30:00 to 30-MAY-04 18:30:00 (CST)
Location: MONEE
Magnitude: 50 EG
Reported by: EMERGENCY MANAGER

Large trees were down on Stuenkel Road, north of Monee.

Flash Flood in LIVINGSTON, ILLINOIS
From 30-MAY-04 17:30:00 to 30-MAY-04 18:30:00 (CST)
Location: DWIGHT
Reported by: AMATEUR RADIO

Roads were closed due to flooding.

Flash Flood in COOK, ILLINOIS
From 30-MAY-04 17:52:00 to 30-MAY-04 19:30:00 (CST)
Location: COUNTYWIDE
Reported by: AMATEUR RADIO

Flooding was reported at Gaelic Park in Oak Forest. Water was up to the hoods of cars. In Streamwood, Poplar Creek was out of its banks. Street flooding occurred at Rand Road and Kennicott Avenue in Arlington Heights. Tinley Park had street flooding and 1.45 inches of rain fell in one hour. Standing water in roads was reported in Oak Forest.

Thunderstorm Wind in KENDALL, ILLINOIS
From 30-MAY-04 17:35:00 to 30-MAY-04 17:35:00 (CST)
Location: YORKVILLE
Magnitude: 50 EG
Reported by: TRAINED SPOTTER

Trees were blown down at the intersection of Route 47 and Route 126.

Hail in KANKAKEE, ILLINOIS
From 30-MAY-04 17:58:00 to 30-MAY-04 18:03:00 (CST)
Location: ESSEX
Magnitude: 1.75 
Reported by: AMATEUR RADIO

Thunderstorm Wind in KANE, ILLINOIS
From 30-MAY-04 17:55:00 to 30-MAY-04 17:55:00 (CST)
Location: AURORA
Magnitude: 50 EG
Reported by: EMERGENCY MANAGER

Trees were uprooted at the intersection of Dugan Avenue and Route 30.

Hail in LIVINGSTON, ILLINOIS
From 30-MAY-04 17:07:00 to 30-MAY-04 17:12:00 (CST)
Location: BLACKSTONE
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Reported at the intersection of Routes 170 and 17.

Thunderstorm Wind in KANE, ILLINOIS
From 30-MAY-04 17:58:00 to 30-MAY-04 17:58:00 (CST)
Location: ELGIN
Magnitude: 50 EG
Reported by: GENERAL PUBLIC

Power lines were blown down.

Flash Flood in KENDALL, ILLINOIS
From 30-MAY-04 18:00:00 to 30-MAY-04 19:00:00 (CST)
Location: YORKVILLE
Reported by: EMERGENCY MANAGER

Roads were flooded.

Flash Flood in WILL, ILLINOIS
From 30-MAY-04 18:40:00 to 30-MAY-04 19:40:00 (CST)
Location: MONEE
Reported by: TRAINED SPOTTER

Flooding occurred at the intersection of Route 53 and Manhattan Road.

Thunderstorm Wind in COOK, ILLINOIS
From 30-MAY-04 18:42:00 to 30-MAY-04 18:42:00 (CST)
Location: HOMEWOOD
Magnitude: 50 EG
Reported by: AMATEUR RADIO

Large tree limbs were blown down.

Hail in KANE, ILLINOIS
From 30-MAY-04 18:05:00 to 30-MAY-04 18:10:00 (CST)
Location: CARPENTERSVILLE
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Flash Flood in LAKE, ILLINOIS
From 30-MAY-04 18:05:00 to 30-MAY-04 19:05:00 (CST)
Location: GURNEE
Reported by: TRAINED SPOTTER

Street flooding occurred.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 30-MAY-04 17:05:00 to 30-MAY-04 17:05:00 (CST)
Location: SHERIDAN
Magnitude: 55 EG
Reported by: AMATEUR RADIO

The roof was torn off of a log home on County Road 2551 East.

Thunderstorm Wind in LIVINGSTON, ILLINOIS
From 30-MAY-04 17:25:00 to 30-MAY-04 17:25:00 (CST)
Location: PONTIAC
Magnitude: 50 EG
Reported by: TRAINED SPOTTER

Trees were blown down on Route 116 east of Lafayette Street, and trees were down in various location in Pontiac.

Tornado in LIVINGSTON, ILLINOIS
From 30-MAY-04 17:11:00 to 30-MAY-04 17:26:00 (CST)
Location: PONTIAC
Tornado F-scale: F1
Reported by: NWS STORM SURVEY

This event was a series of short tornado segments south of Pontiac.  It began 8 miles southwest of Pontiac near County Roads 1400 North and 900 East.  A barn roof was torn off and a large tree was snapped near 1000 East.  Trees and limbs were blown down and farm outbuildings were damaged along County Road 1400 North.  The damage ended at Pike Creek about one half mile west of 1200 East, where doors of a shed were blown out.  Additional damage began just east of Interstate 55, north of County Road 1400 North.  Trees and limbs were down at County Road 1325 East and near a nursing home on Old Route 66.  Damage occurred again near County Road 1700 East, north of County Road 1400 North, where a house had roof damage and trees were blown down.  Tree limbs were damaged on County Roads 1775 East and 1800 East.  The most intense damage was on Billet Rd., about 1/2 mile north of County Road 1400 North, near the Vermillion River.  About 1 dozen large trees were snapped in this area.  The damage path was up to 50 yards wide at this point and the tornado was rated F1.  The damage ended near County Roads 2000 East and 1500 North, where an old barn was blown down.  This is 5 miles southeast of Pontiac.  The total path was 12 miles.

Thunderstorm Wind in KANKAKEE, ILLINOIS
From 30-MAY-04 18:35:00 to 30-MAY-04 18:35:00 (CST)
Location: MOMENCE
Magnitude: 50 EG
Reported by: EMERGENCY MANAGER

Several tree limbs were blown down.

Tornado in LIVINGSTON, ILLINOIS
From 30-MAY-04 17:12:00 to 30-MAY-04 17:12:00 (CST)
Location: DWIGHT
Tornado F-scale: F0
Reported by: TRAINED SPOTTER

An experienced storm spotter and chaser reported a tornado 6 miles southwest of Dwight.  Trees were damaged in this area.  It had a brief narrow path.

Thunderstorm Wind in LIVINGSTON, ILLINOIS
From 30-MAY-04 17:35:00 to 30-MAY-04 17:35:00 (CST)
Location: DWIGHT
Magnitude: 50 EG
Reported by: TRAINED SPOTTER

Trees were blown down on Route 17.

Flash Flood in WILL, ILLINOIS
From 30-MAY-04 18:25:00 to 30-MAY-04 19:25:00 (CST)
Location: CHANNAHON
Reported by: EMERGENCY MANAGER

A park was under water.

Tornado in LIVINGSTON, ILLINOIS
From 30-MAY-04 17:32:00 to 30-MAY-04 17:32:00 (CST)
Location: SAUNEMIN
Tornado F-scale: F0
Reported by: TRAINED SPOTTER

A trained spotter reported and photographed a tornado west of Saunemin.  Trees were knocked down on the north side of State Road 116 near 2500 East, about 3 miles west of Saunemin.

Tornado in LIVINGSTON, ILLINOIS
From 30-MAY-04 17:40:00 to 30-MAY-04 17:42:00 (CST)
Location: CULLOM
Tornado F-scale: F0
Reported by: EMERGENCY MANAGER

A brief, narrow tornado occurred along a 1 mile path on County Road 1700 North, from County Road 3100 East to about 3200 East.  This is about 3.5 to 2.5 miles west of Cullom.  There was minor damage to trees and a farm building.

Hail in LA SALLE, ILLINOIS
From 30-MAY-04 17:10:00 to 30-MAY-04 17:15:00 (CST)
Location: RANSOM
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Thunderstorm Wind in COOK, ILLINOIS
From 30-MAY-04 18:34:00 to 30-MAY-04 18:34:00 (CST)
Location: HOMEWOOD
Magnitude: 55 EG
Reported by: TRAINED SPOTTER

Two inch diameter tree limbs were down.