Could your sun-filled afternoon in the 80s really turn into a freezing morning in the 30s, only two days later? For one U.S.

Combining a weak La Niña, early Siberian snow, and a warm northern Pacific, it’s easy to see why long-range winter forecasting is so complex.

Earth’s jet streams — currents of air that wrap around the planet — are worrying some climate scientists, who this week described the pattern as “chaotic,” “insane” and looking like a van Gogh ...

A stagnant jet stream brings even more rain to British Columbia over the next several days, making any sunshine obsolete. For many in British Columbia, the new year has started on a rather wet and ...

Centuries-old trees can hold clues about global weather patterns. A new UA study unlocked some of those clues.

The jet stream is responsible for some of the wildest weather we can experience across Canada. A band of winds cruising along at more than 200 km/h is responsible for most of the weather we experience ...

The Arctic chill draining across the U.S. over the past several weeks will change course as we turn the page into February. January featured unusual jet stream dynamics across North America, a highly ...

It hasn't been a typical summer in Canada this year. From the East Coast to the West Coast and in between, odd weather patterns including extreme heat and unseasonable cold have been taking Canadians ...