Arctic Air Will Blast Much of US Just Before Christmas

Vehicle on I-15 after an overnight storm in Lehi, Utah on Dec. 13.

Photographer: George Frey/AFP/Getty Images 

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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.

“We’re looking at much-below normal temperatures, potentially record-low temperatures leading up to the Christmas holiday,” said Zack Taylor, a meteorologist with the National Weather Service.