An arctic air mass blowing south out of Canada is expected to blast large swaths of the U.S. with dangerously cold temperatures in the days leading up to Christmas.

An Arctic blast is threatening to dump much of the U.S. in dangerously cold temperatures in the days ahead of Christmas, threatening to impact holiday travel.

BALTIMORE (WBFF) -- Updated 6 a.m. December 18 — Showers move in midweek before brief blast of arctic air. The next weather-maker will move into the region on Wednesday. It will lead to spotty ...

ATLANTA (AP) — Forecasters are warning of treacherous holiday travel and life-threatening cold for much of the nation as an arctic air mass blows into the already-frigid southern United States.

With the Christmas countdown now close to zero, it is the race to get away for the holiday. More than 1,000 flights were either delayed or canceled in or out of Atlanta on Friday, according to ...