A strong, stable vortex is like a skater spinning with their arms tucked closely in, holding in an area of cold air over the ...

The Arctic Oscillation is expected to be in a negative phase next week, which would allow cold air from the North Pole to ...

Miles above the Earth, two bands of fast-moving air – the polar jet stream and the stratospheric polar vortex – sometimes tango together to influence weather in the northern hemisphere.

When the Polar Vortex is in a weakened state, a jet stream wobble sending polar air into the mid-latitudes becomes more ...

Winter in the CSRA is usually mild overall, but every now and then, we get a taste of true Arctic air. If you’ve ever ...

A cooler day is expected as clouds continue to hang over the region. A polar jet stream from the north has dropped into the continental United States, bringing cooler air and chances for snow showers ...

Metro Vancouverites may face unseasonably cold weather as February continues thanks to the stratospheric polar vortex.

We are tracking the return of the polar vortex next week as a wavy jet stream brings a blast of Arctic air to the Great Lakes.