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A major traffic pileup on Friday wounded dozens of people

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The crash blocked Interstate 39/90 for hours

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Beloit Memorial Hospital treated at least 27 people for injuries

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The extent of their injuries is not immediately clear

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Snow, ice, and whiteout conditions, according to State Patrol officers, were factors in the incident

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On Friday, the majority of southern Wisconsin was still under a winter weather advisory

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The accident happened in Rock County, between Janesville and Beloit

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Troopers diverted traffic onto side roads

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Southbound lanes of the interstate reopened on Friday evening

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Another multi vehicle crash on Friday blocked northbound Interstate 41 in Kenosha County