fog

Chicago Weather: A Very Foggy Tuesday Morning Over The City

A dense fog advisory for Cook County is in effect until 3 p.m.

NBCUniversal Media, LLC

No, it was not just your imagination (or your dirty windshield): Dense fog blanketed Chicago highways and skyscrapers Tuesday morning.

According to the National Weather Service, visibility was below a quarter of a mile.

And the fog isn't going anywhere soon.

A dense fog advisory for Cook County is in effect until 3 p.m. this afternoon. While driving, use headlights and plenty of distance ahead of you.

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