Jan 11, 2018
Winter in North America Is Cold — Dec. 2017-Jan. 2018
World Weather Attribution
- The two-week cold outbreak in the northeastern U.S. and southeastern Canada was highly unusual in the current climate; however, it is not unprecedented.
- Cold waves like this have decreased in intensity and frequency over the last century, but still occur.
- Temperatures like these are now about fifteen times rarer. This is equivalent to cold waves being about 4ºF (2ºC) warmer than they used to be.