What is the earliest snowfall in Chicago?

Related questions

1. Does it snow in Illinois in March?
2. How deep is the snow in Chicago?
3. Is Chicago expensive for tourists?
4. How many inches of snow did Chicago get?
5. Does it snow in Chicago?
6. Why is Chicago called the White City?
7. Is it really windy in Chicago?
8. Is Chicago colder than New York?
9. What's the wind chill in Chicago?
10. Is Chicago really the windiest city?

Tags

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2. #marking
3. #years
4. #national
5. #according
6. #inches
7. #friday
8. #weather
9. #snowfall
10. #service
11. #chicago
12. #least
13. #morning
14. #before
15. #measured
16. #nearly