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We can't give you this year's Christmas Day weather forecast in your hometown -- for that you'll have to check in with the local TV stations, or if you're under 30, Google. But we can show you historically where Christmases are most likely to be white in the U.S. The map of the lower 48 from the National Oceanic and Atmospheric Administration plots the probabilities of having at least 1 inch of snow on the ground on December 25 based on some 31 years of data. The white-colored region running through the Rockies and straddling the Canadian border nearly always have snow on Christmas. The South and Southwest, in tan, almost never do. Sure, not much surprising there, but it's still interesting know how often the miracle of falling frozen water will happen when you have to visit your folks every year.

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