Arctic blast, Polar Vortex

A polar vortex dipping down from Siberia will bring a cold front with frigid temperatures to nearly 300 million Americans.
Still, several Colorado school districts will start late on Tuesday as the state waits out the last of subzero temperatures.
Major winter storm brings heavy snow to East Coast as Arctic blast puts millions under warnings from Plains to Maine ...
Some areas of the U.S. may see temperatures as low as -20 or -30 degrees early next week as arctic air from Siberia rolls in.
With severely cold temperatures forecasted in York County this week, utility companies are advising customers to take safety ...
Several businesses and organizations have announced closings and cancellations ahead of the extremely cold temperatures.
An arctic air mass settled over New York City and much of the country Sunday evening, bringing a deep freeze and the chance ...
A potent surge of Arctic air starts settling in Monday evening as a massive dip in the jet stream pulls in frigid air across ...