Extreme winter freeze that hit U.S. actually used to be common

Winters are growing wimpier. 

In much of the U.S., winter is the fastest-warming season. Though future extreme cold snaps are inevitable â€" because frigid Arctic air sometimes spills down south â€" these cold weather episodes are growing, well, less extreme, to the detriment of our winters.

This GIF below, created by Deke Arndt, the chief of the Climate Monitoring Section at NOAA's National Centers for Environmental Information, illustrates how the warming climate is changing our coldest season. While this February was the chilliest February in the last 32 years, earlier generations â€" like in the 1930s, 1940s, 1970s, and 1980s â€" experienced colder such months.  Read more...

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