arctic blast, Polar vortex

A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the ...
Imagine the polar vortex as a giant, icy whirlpool far above the Earth, keeping frigid Arctic air contained near the north ...
These severe cold events occur when the polar jet stream – the familiar jet stream of winter that runs along the boundary ...
The unseasonable chill that has swept through the eastern half of the US defies last year's mild winters and the South's ...
Scientists are scrambling to understand how climate change may be interfering with the winds that carry our weather, with ...
When the vortex is stable, the polar jet stream shifts northward, helping to keep the coldest air within the Arctic. However, when this stable scenario breaks down, it can mean an intense cold ...
In Earth's upper atmosphere, a fast-moving band of air called the jet stream blows with winds of more than 275 miles (442 km) ...
Like much of the U.S., Wisconsinites woke up Tuesday morning to bitter cold conditions. Many schools and colleges throughout ...