I suspect climate change.
For the general trend of the Arctic warming faster than the rest of the world, yes, but the conditions this year have more to do with the state of the atmospheric circulation and how heat is transferred between the Arctic and the surroundings. (There's a reason the winter has been widely cold and turbulent in the mid latitudes).
There could be a connection between climate change and changes in the atmospheric circulation, and there is research suggesting that this is the case, but the details are much less clear.
Another funny fact with global warming is that in some places it can increase the amount of snowfall. Intuitively, global warming will make the snow line tend to move poleward and rise in elevation. But as long as it still gets below freezing, then it can still snow, and in a warmer world you could get more snow since the precipitation patterns can change and in general there is more moisture in the air.