The O’Hare Disc

Background

O’Hare International Airport was one of the busiest airports in the world in 2006 and United Airlines’ main hub, with United operating from Terminal 1, home of Concourse C. The afternoon of Tuesday, November 7, 2006, was overcast, with a low cloud ceiling reported at about 1,900 feet, and the sun was setting during the late-afternoon departure rush.

The story stayed quiet for nearly two months. A United manager filed an account with the National UFO Reporting Center, a private civilian hotline, and Chicago Tribune transportation reporter Jon Hilkevitch spent weeks tracking down witnesses before his front-page story ran on January 1, 2007.

What was reported

According to the witness accounts gathered by the Tribune and later investigators, a ramp worker pushing back a plane from Gate C17 looked up and saw a dark gray, apparently metallic disc hovering silently below the clouds. Word spread over the radio, and roughly a dozen United employees, including pilots taxiing a jet, mechanics and a supervisor, said they saw it. The object had no visible lights. Size estimates ranged from about 6 to 24 feet across, and estimates of how long it hovered ranged from a couple of minutes to about fifteen. Hilkevitch later said the witnesses described it hovering around 1,400 feet up before shooting through the overcast with what they called immense energy, leaving a round opening in the clouds that slowly closed.

Investigations and official findings

When the Tribune first asked, both United and the FAA said they had no information. United spokeswoman Megan McCarthy said company officials did not recall any such incident. Air traffic control recordings obtained through a Freedom of Information Act request, however, showed that a United supervisor had called the O’Hare tower asking whether controllers had seen a disc near C17. The FAA then confirmed the call but said controllers saw nothing and a preliminary radar review found nothing unusual. Spokeswoman Elizabeth Isham Cory said the agency’s theory was ‘a weather phenomenon’, adding that airport lights shining into low clouds can produce odd effects, and the FAA declined to investigate further. Journalist Leslie Kean later pointed out that the FAA’s own pilot manual directs reports of UFO activity to private groups such as the National UFO Reporting Center rather than to the agency itself.

The National Aviation Reporting Center on Anomalous Phenomena (NARCAP), a private group led by former NASA research scientist Richard Haines, published a long technical report in 2007. It found no radar confirmation, judged the witnesses credible and recommended an official inquiry. None followed.

Explanations and debate

Skeptics have offered a fallstreak or ‘hole-punch’ cloud, a gap that forms when aircraft pass through supercooled cloud droplets, along with balloons and lighting effects. They also note that no photograph has ever surfaced despite many witnesses carrying phones, that no witness has been publicly identified, and that two months of conversation before publication gave accounts time to converge. The size estimates differ widely.

Proponents counter that the witnesses were aviation professionals used to judging aircraft, and that the FAA’s first denials weakened confidence in its explanation. Kean, writing in the Providence Journal in February 2007, argued that hole-punch clouds need below-freezing temperatures and wrote that it was 48 degrees Fahrenheit ‘in the O’Hare cloudbank’ that afternoon. Former NASA aviation safety manager Brian Smith said any unknown object near a major airport was a safety issue that deserved study.

Why it still matters

The story drew more than a million page views on the Tribune’s website within days, more than any other story an editor there could recall, according to Columbia Journalism Review. It is now a standard example in debates over pilot reporting and stigma, and it was revisited in Showtime’s 2021 series UFO and in WTTW’s Chicago Mysteries. For skeptics it shows how memories can merge over time; for proponents it shows how easily airport sightings fall through the cracks of official reporting.