The biggest batch of record-setting cold temperatures are likely to hit early Thursday and Friday, Orrison said. But North Dakota already felt more like the North Pole on Tuesday as Bismarck hit minus ...

More than a foot of snow fell in late January that year, setting Iowa up for extreme temperatures once an Arctic airmass plunged out of Canada to start February. The cold was so intense that statewide ...

Arctic cyclones may be accelerating sea ice loss by breaking ice into smaller pieces and driving upwelling of warm water. A study links these storms to rapid ice depletion and suggests that tropopause ...

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Dangerously cold temperatures were descending into the U.S. as far south as Texas on Tuesday, breaking records in some areas.