"And the cold snap would be worse if not for global warming, says Brenda Ekwurzel, a climate scientist from the Union of Concerned Scientists. In fact, she says, "Blizzards and big snowfalls are entirely consistent with global warming," because warmer air traps moisture in clouds, leading to more intense blizzards."
Dr. Ekwurzel's qualifications are here. Like many who opine on these subjects, she apparently has no background in atmospheric science.
We can add "blizzards" to the (extremely long) list of Things Caused By Global Warming. If you've never been to the site, take a moment to click on the link. You'll be amazed by everything global warming "causes."