Heavy rain fell across parts of northern Illinois, including Rockford, causing significant flooding.

Flash Flood in MCHENRY, ILLINOIS
From 07-AUG-07 02:25:00 to 07-AUG-07 08:00:00 (CST-6)
Location: WOODSTOCK
Flood cause: Heavy Rain
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Intersection of Route 47 and 120 closed due to two feet of standing water.  Willow and Clay Streets closed due to waist deep water.  Police conducting rescues from stranded vehicles. Basement flooding was reported throughout Woodstock, and as many as 10 properties were flooded as a creek overflowed its banks in McHenry, IL.

Flood in MCHENRY, ILLINOIS
From 07-AUG-07 08:00:00 to 07-AUG-07 20:00:00 (CST-6)
Location: UNION
Flood cause: Heavy Rain
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flooding continued from heavy rain and flash flooding from earlier on August 7th.  Boot Creek overflowed at Hemmingson Road.  Picnic tables floating near a car barn in three feet of water.  Water flowing over the railway station platform.  Many streets are closed due to flooding in Union.  Marengo measured 5.10 inches of rain and Woodstock measured 4.35 inches of rain.

Flash Flood in LAKE, ILLINOIS
From 07-AUG-07 04:00:00 to 07-AUG-07 08:00:00 (CST-6)
Location: LAKE BLUFF
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

Up to 4 inches of rain fell in a short time in the early morning hours. Some low lying roads had more than 2 feet of standing water. US41 near the Route 176 viaduct was closed due to flooding. One man had to be rescued from his vehicle. Route 176 was also closed at Sheridan Road due to flooding and buckling of pavement.

Flash Flood in WINNEBAGO, ILLINOIS
From 07-AUG-07 01:00:00 to 07-AUG-07 07:00:00 (CST-6)
Location: ROCKFORD
Flood cause: Heavy Rain
Property damage: 1.00M
Crop damage: 0.00K
Reported by: Law Enforcement

Over 6 inches of rain fell over southeast Rockford in a three hour period. The runoff quickly overwhelmed Keith and Madigan Creeks in Rockford as well as other streams across eastern Winnebago County. Hardest hit areas included the Keith Creek watershed in southeast Rockford, the same area that experienced flash flooding on Labor Day 2006. Twenty intersections flooded in Rockford with six cars stranded in flood waters.  Illinois Central railroad tracks washed out at Malford Road just south of Harrison.

Flash Flood in BOONE, ILLINOIS
From 07-AUG-07 01:30:00 to 07-AUG-07 04:00:00 (CST-6)
Location: BELVIDERE
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Newspaper

Several roads and many basements were flooded after 4 to 6 inches of rain fell over southern Boone County in a short period of time. Motorists flooded on Appleton Road near Route 20.

Flood in WINNEBAGO, ILLINOIS
From 07-AUG-07 07:00:00 to 07-AUG-07 22:00:00 (CST-6)
Location: WINNEBAGO
Flood cause: Heavy Rain
Property damage: 2.00M
Crop damage: 0.00K
Reported by: Emergency Manager

Flooding continued from heavy rains and flash flooding earlier on August 7th.  In Rockford, multiple roads closed due to flooding inlcuding Valencia, Avalon, and Churchill Grove from 9th to 20th. City officials in Rockford feared that water flowing over the spillway at the Alpine dam in Rockford would result in structural failure of the 65 year old dam. Residents in a 1200 home area immediately downstream of the dam along Keith Creek were evacuated as a precaution. Flood waters up to the first level of some houses and as many as 12 basement collapses were reported as a result of the flooding. Water came within 2 feet of flowing over the Alpine dam spillway at around 1130 AM. Severe flooding occurred within the Churchill Park area. Significant flooding also occurred along Madigan Creek in the Cherry Valley area. More than 40 residents along the creek were evacuated. About 30 homes along the creek sustained flood damage. Rainfall totals include 6.84 inches 3 miles southeast of Rockford, 6.79 inches northwest of Rockford and 4.70 inches 3 miles northeast of Rockford. The city of Rockford and Winnebago County were declared a state disaster area as a result of the flash flooding and flooding.