What's behind this "Marchuary" weather? There are a few factors (and global warming isn't one of them).

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By Emily Sohn ..."The whole lower 48 and much of southern Canada is feeling the effects of what I call 'Marchuary,'" said Paul Douglas, meteorologist and founder of Weather Nation, a weather outsourcing company in the Twin Cities, Minn. "It really is on the verge of being unprecedented meteorologically to be this warm for this long, this deep into winter."...read here...