CTV.caExtreme weather hits states across the USgulfnews.comTwo different weather phenomena — La Nina and its northern cousin the Arctic Oscillation — affect storm and temperature patterns across the world, meteorologists say. Scientists say you can...

The weather pattern responsible for bringing frigid air to Europe, like this heavy snow fall on the Colosseum in Rome, is driven in part by a naturally-occurring pattern known as the Arctic Oscillation. ...

This Winter's Weirdly Warm Weather ExplainedDiscovery NewsWhat's behind this "Marchuary" weather? There are a few factors (and global warming isn't one of them). By Emily Sohn La Niña is partly to blame for this winter's weir...