As we round out 2024 and head into 2025, above normal warmth across the eastern half of the U.S. will be quickly replaced by a series of Arctic outbreaks... with the coldest air of the season set to take hold through next week.
The NWS defines arctic outbreaks as "very cold air masses that typically originate in the Siberian Region of Asia, cross over the north pole into Canada and push south and east into the lower United States." They occur regularly, but only push this far down into the southern U.S. every four to five years.
Frigid temperatures already arrived in the Northern Plains midweek and are expected to spread south and east through the end of the weekend. Another, more extreme Arctic outbreak is forecast to bring even colder temperatures to the same areas next week.
The coldest air of the season is set to take hold through next week, with temperatures being recorded five to 20 degrees colder than usual for a large swath of the country.
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