Isolated thunderstorms developed along a warm front during the evening of August 28th.  Due to the slow-movement of the storms and copious amounts of moisture contained within the atmosphere, very high rainfall rates occurred.  Rainfall totals across portions of Sangamon, Logan, and Menard counties generally ranged from 2 to 4 inches, with the highest amount of 5.10 being reported on the southeast side of Springfield.  As a result of this rainfall over a short amount of time, widespread flash flooding was reported.  Over 200 water rescues were performed in Springfield.

Flash Flood in SANGAMON, ILLINOIS
From 28-AUG-14 21:00:00 to 29-AUG-14 00:00:00 (CST-6)
Location: LANESVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A slow moving thunderstorm produced 2.50 to 4.00 inches of rain in less than two hours across a small part of rural, eastern Sangamon County. Most rural roads were impassable between Illiopolis and Mechanicsburg. Parts of I-72 between mileposts 117 and 120 had standing water and lane closures. The flooding quickly subsided by Midnight local time.

Flash Flood in SANGAMON, ILLINOIS
From 28-AUG-14 20:30:00 to 28-AUG-14 23:00:00 (CST-6)
Location: (SPI)SPRINGFIELD ARP
Flood cause: Heavy Rain
Property damage: 11.50M
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rainfall amounts of 2.50 to 5.10 inches fell on the Springfield Metro area in less than two hours during the evening of August 28th. Multiple viaducts were flooded in Springfield, streets were inundated with water at least 2 feet deep, vehicles were stranded and parts of Interstates 72 and 55 were closed. Nearly 250 water rescues were performed by the Springfield Fire Department for stranded motorists. No injuries were reported.

Flood in SANGAMON, ILLINOIS
From 28-AUG-14 23:00:00 to 29-AUG-14 04:30:00 (CST-6)
Location: (SPI)SPRINGFIELD ARP
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rainfall amounts of 2.50 to 5.10 inches fell on the Springfield Metro area in less than two hours during the evening of August 28th. Multiple viaducts were flooded in Springfield, streets were inundated with water at least 2 feet deep, vehicles were stranded and parts of Interstates 72 and 55 were closed. Nearly 250 water rescues were performed by the Springfield Fire Department for stranded motorists. No injuries were reported. The rainfall ended prior to 10:30 pm LST, but the flooding in the city of Springfield lingered until 4:30 am LST due to the amount of rainfall and an overload of water on the city sewer system.

Flash Flood in LOGAN, ILLINOIS
From 28-AUG-14 20:00:00 to 28-AUG-14 22:30:00 (CST-6)
Location: MIDDLETOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A slow moving thunderstorm produced 2.50 to 4.00 inches of rain in less than two hours across southwest Logan County and western parts of the city of Lincoln. Most rural roads were impassable between New Holland, Lincoln and Middletown. State Route 10 west of Lincoln was closed for a short period of time, and streets in the western half of Lincoln were inundated. The flooding quickly subsided in less than three hours.

Flash Flood in MENARD, ILLINOIS
From 28-AUG-14 20:00:00 to 28-AUG-14 22:30:00 (CST-6)
Location: HUBLEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A slow moving thunderstorm produced 2.50 to 4.00 inches of rain in less than two hours across a small part of rural, northeast Menard County. Most rural roads were impassable between Sweetwater and Middletown. The flooding quickly subsided in less than three hours.

Flash Flood in CHRISTIAN, ILLINOIS
From 28-AUG-14 21:30:00 to 29-AUG-14 00:30:00 (CST-6)
Location: MT AUBURN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A slow moving thunderstorm produced 2.50 to 4.00 inches of rain in less than two hours across a small part of northwest Christian County. Most rural roads were impassable between Edinburg and Mt. Auburn. This was the second time within three days that flash flooding was reported in northwest Christian County. The flooding quickly subsided shortly after Midnight local time.