Other facts about the haboob.
Visibility was down to 0.25 miles southeast of Bloomington in McLean County, around a stretch of Interstate 57 in Will County, in the southern suburbs up through Chicago in Cook County, and around South Bend, Indiana.
Chicago had visibility of less than a mile for 72 minutes.
A severe dust storm from the Dust Bowl affected Galena and suspended rides at the 1933 World's Fair reported in the Chicago Tribune, cited as the earliest similar report with a minimum visibility of 0.5 miles at Midway International Airport (then Chicago Municipal Airport).
