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Tornado Outbreak Possible Again in Chicago Area Wednesday; Flash Flooding, Damaging Winds From 2 Rounds of Storms

Forecasters warn the second round could bring strong tornadoes, with the entire Chicago area under severe weather threat through about 9 p.m.

  • On Wednesday, the Chicago area faces a severe weather outbreak with two rounds of storms expected, including a moderate risk of strong tornadoes. The National Weather Service warned of a "threat for a dangerous outbreak of damaging tornadoes" across the region.
  • A volatile environment with a warm front lifting north and an approaching low-pressure system is driving the severe potential. Strong wind shear, unusual for June, heightens concerns for significant weather events.
  • The first round hits between 7 and 11 a.m., while the second round, expected between 3 and 10 p.m., carries the "better chance for severe weather." Hazards include damaging winds topping 75 mph, large hail, and torrential rainfall.
  • Meteorologist Alex Erwin urged residents to review safety plans and identify secure shelter locations in advance. "Prepare now if you live in a flood prone area," the National Weather Service said, as rainfall could exceed 2 inches per hour.
  • Following an active week in which 17 tornadoes were confirmed in northeast Illinois, the region faces another significant threat. After Wednesday's storms, sunny skies and temperatures in the 70s are expected through Saturday.
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NBC Chicago broke the news in Chicago, United States on Tuesday, June 16, 2026.
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