Dangerously cold temperatures lingered over large swaths of the country for several days in mid-January 2024.
A large mass of Arctic air spilled south from Canada and lingered for several days over much of the contiguous United States in mid-January 2024. The system brought a wintry mix of bitterly cold temperatures, freezing rain, and snow that extended from the Pacific Northwest all the way to the East Coast.
As the airmass came south, sub-zero air temperatures settled over Montana and the Dakotas on January 13 and 14. Air temperatures at a National Weather Service station in Billings, Montana, reached-30 degrees Fahrenheit (−34 degrees Celsius) on January 13, the lowest temperature recorded there since the site was established in 1999.
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