A ‘once in a generation’ winter storm will impact nearly every state and cripple Christmas travel

A major winter storm and cold blast will impact nearly every state and bring what the National Weather Service is calling a “once in a generation type event” that will cripple travel on some of the busiest travel days of the year.

The strengthening storm will bring more than a foot of snow and possible blizzard conditions to the Midwest, as the weather service warns of “life-threatening” wind chills for millions.

More than 90 million people are under winter weather alerts and more than 87 million are under wind chill...