This past Sunday, Mayor Bill De Blasio warned that the impending snowstorm could be "one of the largest snowstorms in the history of this city." While New York was spared the worst effects of the storm, blizzards can be incredibly destructive forces, and accurately predicting these snowstorms is crucial, but often far more complicated than people realize. For today's Please Explain, we are talking all about blizzards with Andrew Freedman, Science Editor for Mashable and former Senior Science writer for Climate Central. His writing has also appeared in the Washington Post, online at The Weather Channel, and washingtonpost.com, where he wrote a weekly climate science column for the "Capital Weather Gang" blog.