Huge storm system brings heavy snow, tornadoes to parts of U.S.
From the Watch Now: Tornadoes and snow hit parts of U.S., and more of today's top videos series
A huge Colorado low is tracking across the U.S. bringing dangerous weather from the Rockies to the Midwest. Tornadoes have torn apart buildings in the south, while blizzard conditions are hitting in the north. And Canada won't be spared its wrath either.
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A massive storm brought tornadoes and snow through parts of Texas, Louisiana and Oklahoma, a…
