arctic blast, Polar vortex

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.
These severe cold events occur when the polar jet stream – the familiar jet stream of winter that runs along the boundary ...
An arctic air mass settled over New York City and much of the country Sunday evening, bringing a deep freeze and the chance ...
Several businesses and organizations have announced closings and cancellations ahead of the extremely cold temperatures.
A polar vortex is slated to sweep most of the continental United States bringing a hazardous freeze to millions of Americans ...