Integrated Climate System Modeling Laboratory

From heat wave to snowstorms, March goes to extremes
http://bit.ly/13c5hsJ

"The weather pattern that is responsible for this year's cold weather is unusual, even though it is not yielding extremely cold temperatures across the U.S. In fact, March is running near average for the lower 48 states. Still, after last year's nonexistent winter and downright summer-like spring, any cold and snow in March may seem like a shock to the system."

Image: Climate Central