Polar vortex, arctic

The polar vortex is a ring of cold air that typically circles the Arctic. A strong jet stream essentially acts like a fence, ...
The most unusually cold air in the Northern Hemisphere will be over the United States early next week, bringing dangerously ...
A polar vortex is slated to sweep most of the continental US bringing winter storm warnings and a hazardous freeze to ...
Although people from all over the country, of all ages and backgrounds, joined the People's March, one protester said no one ...
Americans face dangerously cold temperatures as a polar vortex brings life-threatening conditions. Nighttime lows may drop to ...