Last week's marathon winter storm was the result of a big dip in the jet stream. Here's why, and how we use the location of the jet stream to forecast.

The polar jet stream circles the northern hemisphere, swirling up to nine miles above our heads like a curvy, ethereal crown on the planet. This band of strong wind separates cold air from the ...

Bitter polar winds will plough into warm air left from summer to unleash a deluge of thunderstorms. A sharp change in the ...

To analyse historical variability in the position of the polar jet stream over Europe, we developed a tree-ring-based reconstruction of European summer jet-stream latitude, using temperature ...