The cold air outbreak of the next few days is nothing unusual, and neither inconsistent with an overall picture of a warming world, nor evidence that global warming is making cold weather more extreme.
Cohen focuses on a hypothesis that he's been assessing for quite a few years — a relationship between retreating sea ice, expanding Siberian snows and more widespread coldoutbreaks.
Surprisingly, however, over the past two to three decades, the increase in extreme weather has included more (not fewer) severe cold - air outbreaks and heavy snowfalls observed both in North America and Eurasia6, 12,15,18,22,23,24,25.