CHICAGO (CBS) --What's the difference between a snowstorm and a blizzard? How does a snowstorm become a blizzard? If you think it's just about how much snow falls, think again. While snow is obviously ...
A powerful snowstorm could grind holiday travel to a halt in the coming days, and in Chicago, it has the potential to evolve into an all-out blizzard that is expected to become one of the worst in ...
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