Shae Cohan photographed these sprites on August 26. Sprites are electrical discharges that occur above thunderstorms, typically at an altitude of 30 to 55 miles. The picture was taken from Macomb, although the storms in question were southeast of Springfield near Taylorville. (click image to enlarge)
A thunderstorm brought Springfield some of its heaviest short-term rainfall totals on record. 1.05 inches of rain fell in only 5 minutes. The 10-minute total was 1.42 inches, which grew to 1.5 inches by the end of the 15-minute period. Later in the day, severe thunderstorms produced $20 million damage in far east central Illinois, around Danville; 30,000 acres of crops were destroyed by hail.