Strong to severe thunderstorms moved across parts of central Illinois during the morning hours of June 20th.

Flash Flood in LA SALLE, ILLINOIS
From 20-JUN-11 08:45:00 to 20-JUN-11 10:45:00 (CST-6)
Location: TWIN BLUFFS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water more than 6 inches deep was moving cars as it flowed over portions of Route 71 near North 2401 Road and North 2650 Road.

Thunderstorm Wind in GRUNDY, ILLINOIS
From 20-JUN-11 05:00:00 to 20-JUN-11 05:01:00 (CST-6)
Location: MORRIS
Magnitude: 55.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees and power lines were blown down in Morris.  The most significant was on Liberty Street, where a tree fell onto a house causing damage.  Another tree fell and blocked Cemetery Road.

Lightning in KANKAKEE, ILLINOIS
From 20-JUN-11 05:00:00 to 20-JUN-11 05:00:00 (CST-6)
Location: BOURBONNAIS
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Newspaper

A large tree was struck by lightning in an alley near Kennedy Drive and North Street.  The tree then fell on to three cars, destroying two of them.  Power lines were also brought down by the falling tree.

Lightning in COOK, ILLINOIS
From 20-JUN-11 06:00:00 to 20-JUN-11 06:00:00 (CST-6)
Location: CONGRESS PARK
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

Lightning struck the chimney of a brick building near La Grange Road and Burlington Avenue.  Bricks and debris were scattered across the street and on sidewalks.

Flash Flood in LA SALLE, ILLINOIS
From 20-JUN-11 05:15:00 to 20-JUN-11 12:00:00 (CST-6)
Location: OTTAWA ARPT
Flood cause: Heavy Rain
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Newspaper

Street and basement flooding was reported in Ottawa.  Water in some basements was several feet deep.  A sink hole was found next to a driveway on Main Street.

Tornado in KANKAKEE, ILLINOIS
From 20-JUN-11 05:14:00 to 20-JUN-11 05:17:00 (CST-6)
Location: LEHIGH
Tornado F-scale: EF0
Property damage: 100.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The survey team reported a housing residence along Route 17 that had a shed completely destroyed, with the walls collapsed and the roof blown approximately 25 feet away.  There was extensive hardwood tree damage for most of the damage path.  Most of the trees damaged were either uprooted or snapped off at the base.  These were large, mostly healthy trees.  There were several trees where the break was a third to half of the way up the tree trunk.  One of the housing structures along 7000W had a glass window blown out.  An additional building had damage in the siding from a branch piercing the outer wall.  Along 2000N, there were several occurrences of damage to man-made objects at several homesteads.  The door on a large tin barn was blown into the structure and several panels of the siding collapsed.  On the same property, a wooden corn shed was completely destroyed, and a house sustained shingle damage.  A metal siding fence also blew down on the property line, as well as a chain link fence.  Another property on 2000N incurred heavy structural damage due to fallen trees.  Along the damage path, there were convergent wind patterns in several corn and wheat fields.  In addition, the fallen trees laid in a convergent pattern.  Many branches were speared into the ground in a convergent pattern, as well.  The nature of this damage was consistent with an EF1 tornado with winds of 100 to 110 mph.

Thunderstorm Wind in LIVINGSTON, ILLINOIS
From 20-JUN-11 04:45:00 to 20-JUN-11 04:45:00 (CST-6)
Location: PONTIAC
Magnitude: 51.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree limbs and power lines were blown down.