EXPLAINER: Arctic blast sweeps US, causes bomb cyclone
Nearly every state to be impacted by a 'once in a generation' winter storm
NOAA
Deadly winter storm knocks out power for 1.5m in US and Canada - BBC News
Bomb cyclone': Arctic blast sweeps across US, Canada
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Historic winter storm and Arctic blast engulf the U.S.
Bone-chilling Arctic blast closes in as millions prepare for winter polar vortex - Weather - News - Daily Express US
Nearly every state to be impacted by a 'once in a generation' winter storm
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