Unusual storm pushes North Pole temperatures 40 F above average

“There’s been warm air for weeks over the eastern United States and parts of Europe … and it’s the warmest December on record,” he said. “It’s a sign of how much warm air was around when the storm system came, pulling that air to higher latitudes.”
http://america.aljazeera.com/articles/2015/12/30/north-pole-temperatures-40-f-above-average.html