Storm threatens to upend plans on 1 of busiest travel days of holiday season

More than 30 million people are under winter weather alerts across the Midwest and Northeast early this week with another storm threatening to upend travelers’ plans on what is expected to be one of the busiest travel days this holiday season.
At least 2 million people are under blizzard warnings in the Midwest, where winds could gust from 40 to 60 mph. Those wind gusts could blow heavy snow around, reducing visibility to less than a quarter of a mile in many warning areas.
More than 5,000 flights within, into or