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) ...

Scientists are scrambling to understand how climate change may be interfering with the winds that carry our weather, with ...

A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the ...

These severe cold events occur when the polar jet stream – the familiar jet stream of winter that runs along the boundary ...

When there are disturbances in which the Jet Stream weakens, it can become wobbly. This allows the cold air to plunge southwards. A disrupted polar vortex does not happen every year. Very much so what ...

It's like "bomb cyclone" or "firenado." It seems like the sort of phenomenon that would be responsible for the ...

A mass of air called the polar vortex has escaped the Arctic and plunged southward. Some scientists see the fingerprints of climate change.

Part of Mississippi under extreme cold warning after winter storm dropped snow across the Gulf Coast. When will temperatures ...

The unseasonable chill that has swept through the eastern half of the US defies last year's mild winters and the South's ...

The amount of snow the Gulf Coast States received makes this weather system the worst winter storm in over 120 years. Before ...

Like much of the U.S., Wisconsinites woke up Tuesday morning to bitter cold conditions. Many schools and colleges throughout the Milwaukee area closed as the area braced for the dangerous freezing ...

Frigid air that normally stays trapped in the Arctic has escaped, plunging deep into the United States for an extended visit ...