Mosquito Bites in December? What's Up With the Weather?

New York, NY —

At 7:22 PM tonight, winter officially begins. And while Denver is getting walloped by two feet of snow, not a single flurry has fallen in the city and things aren't much better in New England. A cherry tree is blooming at the Brooklyn Botanical Gardens. There are reports of mosquito bites in December.

And it's not just the Northeast, Moscow and the Alps are also lacking snow. So what the heck is going on? We're joined now by Professor Drew Shindell, a climatologist at Columbia university.