Story perspectives

Chicago Tornado Warning Grounds Flights, Triggers Shelter Orders

8/11/2026

Summary

Story summary

The National Weather Service issued a tornado warning for Chicago on August 11, 2026, urging residents to shelter.
Meteorologist Kevin Jeanes said storms from 9 a.m. to 3 p.m. could produce 80 mph gusts, tornadoes and thunderstorm warnings through 2 p.m.
The FAA grounded flights at O’Hare until 11:15 a.m., causing about 250 cancellations and hour-long delays.
Chicago buildings directed people to shelter in basements as the storm moved east at 40–75 mph, with hail and flash-flood risks.

History

Historical Context

The June 21 1995 F2 tornado that hit Chicago prompted the National Weather Service’s first citywide large-scale tornado warning. It followed the 1990 Plainfield F5—Illinois’s only metropolitan F5 that killed 29—and a long history of Illinois tornadoes, which average about 35 per year. The August 11 2026 warning shows the same vulnerability and the need for upgraded radar.

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Story summary

The National Weather Service issued a tornado warning for Chicago on August 11, 2026, urging residents to shelter.
Meteorologist Kevin Jeanes said storms from 9 a.m. to 3 p.m. could produce 80 mph gusts, tornadoes and thunderstorm warnings through 2 p.m.
The FAA grounded flights at O’Hare until 11:15 a.m., causing about 250 cancellations and hour-long delays.
Chicago buildings directed people to shelter in basements as the storm moved east at 40–75 mph, with hail and flash-flood risks.

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