A polar air mass is expected to send temperatures to record lows into the weekend, prompting frostbite warnings.
Arctic blast to bring coldest air of season to Eastern U.S. - The Washington Post
Why extreme cold weather events still happen in a warming world
US braces for dangerous blast of cold, wind and snow
January–February 2019 North American cold wave - Wikipedia
50 degree wind chills & heavy snow: Extreme cold grips U.S. on
See photos and videos of the severe winter storm hitting states like Colorado and Wyoming - The Boston Globe
US & Canada News Today's latest from Al Jazeera, News
The Most Intense Arctic Blast of the Season heads for Canada and
US braces for dangerous blast of cold, wind and snow
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Arctic blast map: Thunderstorm to smash US this weekend with -20F
Generational' Arctic blast hits Northeast US, Canada, Weather News
Extremely dangerous' cold weather grips Prairies, Ontario, Quebec
Extremely dangerous' Arctic blast hits northern US and Canada Weather News - WireFan - Your Source for Social News and Networking
The Most Intense Arctic Blast of the Season heads for Canada and
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