Smoke from western wildfires seen over Chicago - FOX 32 News Chicago

Smoke from western wildfires seen over Chicago

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CHICAGO (FOX 32 News) -

Sunday started as a picture perfect day with bright blue skies, but by the afternoon we had a milky white haze overhead.

That haze wasn't from clouds - it was the smoke from wildfires in the western United States.

The smoke traveled over a thousand miles on the jet stream in the upper atmosphere. It is visible in the satellite image as rippled lines over northeastern Illinois including Chicago.

The smoke originated last week and only appeared overhead by Sunday. Additional charts below show where last weeks fires were and the path they traveled to get here.

Scientists use satellite images to determine the origination of air masses and track particulates in the air.

Using this method researchers have even been able to identify mercury deposits on the floor of Lake Michigan as particulates from power plants in China that traveled here on strong jet stream winds.

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