Cold and snowy weather has gripped much of the northern tier of the United States since Thanksgiving, but a pattern change will torch the chance of white Christmas for many.
A white Christmas is when at least 1 inch of snow is on the ground on the morning of December 25, according to the National Oceanic and Atmospheric Administration.
Arctic air has made frequent surges across the Midwest, Northeast and South for weeks, including the coldest of the bunch this past weekend. That’s allowed winter storms to cover a large chunk of the northern states with snow.
But the big question is: How much snow will stick around for Christmas Day since a big jet stream pattern shift is promising a…
