Half the nation is shivering under yet another blast of arctic air. But where are winters the coldest?
Yet another arctic chill is settling in over most of the U.S. Check out which states have the coldest winters, based off average winter temperatures between 1971 and 2000 from the NOAA's National Climatic Data Center.
What's behind the tradition of turning our clocks ahead each spring?
Click here to read Bob's blog.