Severe thunderstorms developed during the afternoon hours and moved northeast across parts northern and central Illinois.  Three tornadoes were confirmed during this event.

Thunderstorm Wind in LIVINGSTON, ILLINOIS
From 19-AUG-09 15:10:00 to 19-AUG-09 15:10:00 (CST-6)
Location: PONTIAC
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in LA SALLE, ILLINOIS
From 19-AUG-09 15:18:00 to 19-AUG-09 15:20:00 (CST-6)
Location: STREATOR WEST
Magnitude: 70.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous trees, tree limbs and power lines were blown down across much of Streator.  One tree fell onto a house on Washington Street.  Wind gusts were estimated as high as 80 mph.

Flood in LA SALLE, ILLINOIS
From 19-AUG-09 16:20:00 to 19-AUG-09 20:00:00 (CST-6)
Location: MENDOTA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Yard and street flooding was reported north of Mendota with a storm total rainfall of 2.49 inches.

Hail in KANE, ILLINOIS
From 19-AUG-09 17:17:00 to 19-AUG-09 17:19:00 (CST-6)
Location: PINGREE GROVE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in WILL, ILLINOIS
From 19-AUG-09 15:45:00 to 19-AUG-09 15:45:00 (CST-6)
Location: LORENZO
Magnitude: 65.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A mobile home was overturned just south of Lorenzo Road.

Tornado in IROQUOIS, ILLINOIS
From 19-AUG-09 17:00:00 to 19-AUG-09 17:07:00 (CST-6)
Location: PITTWOOD
Tornado F-scale: EF1
Property damage: 100.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down along County Road 2100 East, north of the intersection of County Roads 2100 North and 2100 East.  The initial touchdown was in a corn field where the corn was laid down in a convergent pattern.  At this location, the tornado was approximately 20 yards wide.  The tornado then crossed County Road 2100 North where it caused damage to trees and a small corn silo next to a farm house.  Just behind this farm house, several large trees were broken near their base with one tree uprooted.  Most of these trees were around three feet in diameter.  Some internal rot was noted in a few of the trees making them more susceptible to wind damage.  The tornado then appears to have lifted briefly before touching down again just behind a home along County Road 2200 East, between County Roads 2100 North and 2150 North.  At this location, significant tree damage was observed with multiple limbs between one and two feet in diameter being broken and falling in a convergent manner.  Also at this location, a detached garage was destroyed with debris being scattered 50 to 100 feet to the northeast.  This appears to be the point along the damage path where the tornado reached its maximum intensity with an estimated peak wind speed of 105 mph and a width of 50 yards.  The tornado then crossed County Road 2100 East causing damage to corn along both County Road 2100 East and County Road 2150 North.  After crossing County Road 2150 North, the tornado destroyed a barn housing farming equipment, measuring 44 by 72 feet.  Debris from this barn was scattered in all directions from the barn's original location.  Several pieces of farm equipment estimated to weigh between 5,000 and 15,000 pounds were moved several feet north and northeast of their original location including a grain wagon which was lifted and placed on top of other farm equipment.  After destroying the barn, the tornado moved northeast through a corn field where additional crop damage was observed.  The tornado then again briefly lifted before striking a home and a detached garage along County Road 2340 East.  Siding and minor roof and shingle damage was observed on the house and the detached garage lost its roof and suffered a collapse of the south wall.  At this location, the tornado was estimated to be about 40 yards wide.  The tornado appears to have lifted as it crossed County Road 2340 East.

Thunderstorm Wind in LA SALLE, ILLINOIS
From 19-AUG-09 15:05:00 to 19-AUG-09 15:05:00 (CST-6)
Location: OGLESBY
Magnitude: 50.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Newspaper

A delivery truck and trailer were blown against a guard shack and destroyed just west of Interstate 39 in Oglesby.  Another trailer was tipped over and the roof of thrid trailer was blown off.

Tornado in KANE, ILLINOIS
From 19-AUG-09 17:00:00 to 19-AUG-09 17:02:00 (CST-6)
Location: ELBURN
Tornado F-scale: EF1
Property damage: 25.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down just north of Route 38.  At this location, a field of corn was flattened in a covergent manner towards the northwest.  Damage was rated EF0 with winds near 65 mph and a path width of 20 yards.  The tornado moved northwest and intensified as it moved along Route 47 where it snapped off and uprooted multiple large hardwood and softwood trees.  The damage at this location was blown in a convergent pattern to the northwest.  EF1 damage was observed with winds estimated near 105 mph and a path width of 40 yards.  The tornado continued to the northwest maintaining its strength causing more tree damage along Route 47.  Several trees were snapped off and consistently blown in the same direction to the northwest.  Several cars were damaged by falling tree limbs.  Damage was rated EF1 at this location with winds near 105 mph and a path width of 40 yards.  Several residences along Route 47 continued to receive damage to many trees on their property even as the tornado was weakening.  The last of the damage observed was in a corn field just to the west of Route 47.  Here corn was flattened and twisted before the the tornado lifted with the damage rated EF0 with winds near 65 mph.

Thunderstorm Wind in WILL, ILLINOIS
From 19-AUG-09 15:40:00 to 19-AUG-09 15:40:00 (CST-6)
Location: BRAIDWOOD
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Damage was reported to a storage trailer and to the roof of a gas station near Interstate 55.

Tornado in KANE, ILLINOIS
From 19-AUG-09 17:15:00 to 19-AUG-09 17:16:00 (CST-6)
Location: LILY LAKE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down in a subdivision about a half mile north of Route 64.  At this location, several large hardwood tree limbs were snapped and twisted off.  Damage here was rated EF0 with winds near 75 mph and a path width of 30 yards.  The tornado quickly moved to the northeast where it continued to cause damage to multiple large trees in this subdivision.  The tornado began to weaken and produced the last of its damage about a quarter mile north of Route 64 where several large tree limbs were snapped off.  Damage was rated EF0 with winds near 70 mph and a path width of 30 yards.