Weather records (from the National Weather Service, Chicago) 1961 ... before the experiment was abandoned. 1979: The city was walloped by a massive blizzard that dumped 20.3 inches of snow.

The blizzard of 1967 buried Chicago under 23 inches of snow. Just 11 years later, another blizzard blanketed the city in almost a foot of snow. Just before the morning rush hour on Jan. 26 ...

A Midwest blizzard that delivered Chicago's heaviest snowstorm on record ... Chicago in 1999 (21.6 inches), 2011 (21.2 inches) and 1979 (20.3 inches). Worsening the conditions were wind gusts ...