Cold front brings storms as it passes through.
Showers and thunderstorms -- some severe -- are just to the west and inching closer to Chicago.
A tornado watch has been issued for all the counties in the NBC Chicago viewing area and several counties in Wisconsin.
A watch means that conditions are favorable for the development or tornadoes.
Thunderstorms are also likely for Saturday night and there is a possibility they may linger into early Sunday morning.
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