February 2015 North American cold wave

The February 2015 North American cold wave was an extreme weather event that affected most of Canada and the eastern half of the United States. Following an earlier cold wave in the winter, the period of below-average temperatures contributed to an already unusually cold winter for the Eastern U.S. Several places broke their records for their coldest February on record, while some areas came very close.

Source: Wikipedia — February 2015 North American cold wave (CC BY-SA 4.0)