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Arctic Blast to Follow Northeast Snow, Trigger Heavy Lake-Effect
Snowstorm to Hit Central States, Northeast This Weekend
Extensive US Snow Cover Reaches Unusually Far South
A storm of charged particles coursing through a volcanic ash cloud sparked the spectacular green lightning seen at Chile's Chaiten Volcano in 2008.
From skiing to snow sculpting to "polar bear" plunges, these festivals embody the joy of winter recreation.