Even in a warming climate, brutal cold snaps still hammer parts of the U.S., and a new study uncovers why. High above the ...

Despite a warming climate, bone-chilling winter cold can grip parts of the U.S. In a study appearing in Science Advances, researchers found that two specific patterns in the polar vortex, a swirling ...

The Arctic Oscillation is expected to be in a negative phase next week, which would allow cold air from the North Pole to spill southward. To stream 3NEWS on your phone, you need the 3NEWS app ...

Dust off the parkas. After a mild December, the polar vortex is set to send an arctic blast into the US later this week. “That polar jet will be pushed further south, and guess what that does ...

Will it snow in East Tennessee this winter? WATE's Ken Weathers looks at what's expected in December, January and February and how La Niña and Arctic Oscillation impact the forecast.

Will it snow in East Tennessee this winter? WATE’s Ken Weathers looks at what’s expected in December, January and February and how La Niña and Arctic Oscillation impact the forecast.

A flip-flopping, yearslong pattern of winds helps control the fate of the Arctic’s sea ice — by regulating how much of the Atlantic Ocean’s relatively warm, salty water sneaks northward into ...

Because the Arctic Oscillation is a short-term phenomenon, it is rarely considered when seasonal outlooks are made. The last winters with strongly negative Arctic Oscillations were 2010 and 2014.

Negative phase in Arctic Oscillation. Looking Forward. In the coming days, beyond January 23, indications are that the polar jet stream will strengthen and send the frigid air back to Canada.

The Arctic Oscillation involves a continuous fluctuation between strong and weak areas of low pressure at the poles. In the negative (- AO) phase, the weakened low allows cold air to escape, ...