On Tuesday, January 24 the high had been an unseasonably warm 65 °F (18 °C). The temperature started falling the next day. There was no warning to the public of the magnitude of what was to happen beginning Thursday morning, as the forecast on Wednesday mentioned a possible (chance of 50%) snowfall of 4 inches. Even as the day progressed, people were not fully aware of the extent that the snow would stop travel within and to and from the area, as noted in the understated opening to the evening news on television station WMAQ-TV on January 26, 1967, where the newsman reported that the worst of the storm was over, which it was not.
The snow fell continuously in Chicago and surrounding areas from 5:02 am on Thursday, January 26 until 10:10 am Friday when 23 inches (58 cm) had fallen. The storm played havoc with travel home from work and school. "Thousands were stranded in offices, in schools, in buses. About 50,000 abandoned cars and 800 Chicago Transit Authority buses littered the streets and expressways." Other sources estimate 20,000 cars and 1,100 buses stranded in the blizzard. Gusts of 48 to 53 miles per hour (measured at Midway Airport) caused large snowdrifts to accumulate. Thunderstorms occurred and several funnel clouds were sighted during the blizzard.
The blizzard closed both Midway Airport and O'Hare Airport. Ten-foot drifts covered the runways at Midway. Chicago Mayor Richard J. Daley ordered city workers to clear city streets around the clock and asked citizens for help. On Friday, the city was virtually shut down and area schools were closed.
Chicago's fleet of 500 snow plows and 2,500 workers was out in force, and additional snow removal equipment was sent from Iowa, Wisconsin and Michigan.
Many of the south suburbs of Chicago reported that their snow plowing equipment failed during the blizzard, and recommended people stay home on Friday, as recorded in a collection of local radio news reports from the first day of the blizzard.
Although the city was on the move again by Tuesday, it took the city of Chicago three weeks to plow all the streets of snow, as it did not warm up enough for the snow to melt away.
In 2017 as the 50th anniversary of the blizzard neared, people looked back on their own stories of the first day, how long it took some to get home, up to six hours for a usual half hour trip, and how some did not get home for one to two days, staying in their car, in a local tavern. One woman decided to walk home from her downtown job, and she said, "People were helping each other — it was wonderful. People were stopping in cars that could get through, and they would take you a certain distance," she said. "Back then, you could trust people to take you where you wanted to go. You never thought twice about getting in and letting them give you a ride home."
Some sources consider this blizzard to have been "paralyzing" to the city, and the greatest disruption in the city since the Chicago Fire of 1871. Plowing was rendered ineffective as the snow fell because the blizzard winds blew the snow back on the freshly plowed roads, stranding vehicles on expressways and arterial streets alike.
After the winds stopped blowing, snow removal could be effective, slowly. Helicopters were the emergency vehicles, delivering medicine to diabetics, and food to people stranded in their cars. Expectant mothers were taken to hospitals by sleds, snow plow or even a bulldozer. Women who could not get out, delivered their babies at home. The airports opened about midnight Monday after the snow stopped falling. Most schools reopened on Tuesday following the blizzard. People who were school age in the blizzard recall the beauty of the snow-covered city and the fun they had in the snow when school was closed.
Twenty-six people died in the city on account of the blizzard, including a young girl shot in crossfire between looters and police. Some died from heart attacks due to shoveling the snow.
The Chicago area started to recover from the extreme snowfall over the weekend, then it snowed 4 inches (10.2 cm) on Wednesday, February 1. The following Sunday, February 5, another storm dumped 8.5 inches (21.6 cm) of snow.
The 23 inches of snow that fell on Chicago for 29 hours from the morning of January 26, 1967 is a record for a single storm. The 19.8 inches (50.3 cm) that fell on January 26–27 was the greatest amount of snow for a 24-hour period, later surpassed by Groundhog Day Blizzard of 2011 with 20.0 inches February 1-2, 2011. The single day record of 16.4 inches (41.7 cm) for January 26 was later broken by the Chicago Blizzard of 1979 when 16.5 inches (41.9 cm) fell.
Between January 26 and February 5, 36.5 inches (92.7 cm) of snow fell, which is typical for an entire Chicago winter.
In 2011, when another snowstorm was in progress, the ten worst snowstorms in Chicago to that date were noted, the list topped by the January 1967 storm. Later severe snowstorms did not stop the city totally, because of improved weather forecasting which allowed businesses to decide to close early when snow was expected, and the city to devise plans for effective snow removal for each snow storm, including barring overnight parking on main streets in winter. Sensors and cameras are in place to see where snow removal is most needed, and the fleet of snow plows is smaller to do the same work, at 330.
Disposing the snow collected by plows posed challenges on account of the drifting and the quantity of snow and so many roads blocked by abandoned vehicles. Some was put on a train in refrigerated cars to Florida so children there could see what snow looked like. Other railroads disposed of snow on their own property by melting it, or if they had freight trains heading south, loaded a few cars with snow that would melt en route. The city of Chicago resorted to dumping it in the Chicago River, a practice no longer used, for bad effects on river water quality; instead it has designated locations throughout the city for dumping excess accumulations. The city also had a few vehicles that melted the snow in the truck, greatly reducing its volume.
Some roofs collapsed, vehicles were stalled in snow, while some people had fun or tried out their snowshoes to get to work on Friday January 27, 1967. In 2013, The Chicago Tribune collected its photos from those days, to tell the story that way.