It's been all over the news, and all over the ground: snow in Paris. My friend complained of a 739km traffic jam coming home from a ski vacation. Another complained that because so much of Paris' public transportation was paralyzed, they had to walk 4km, at night, with children, dragging ski luggage in the snow, in order to get home. Meanwhile, in Tahoe, the ski grounds of Northern California, my friends complain there's virtually no precipitation and temperatures around 60°F (that's 16°C) in the middle of winter.