As the National Weather Service explains, the polar vortex is an area of low pressure and cold air that exists over both of ...

A polar vortex collapse is expected over the next two weeks, causing extreme winter weather and travel disruption across North America. The weather phenomenon is expected to develop in mid-March, ...

A polar vortex collapse is predicted to hit over the coming weeks, resulting in severe winter weather and travel disruptions throughout North America. Parts of the US and Canada are predicted to see ...

The Met Office says there is an 80 per cent chance of sudden stratospheric warming in March, which could bring severe and ...

the vortex expands, sending extremely cold air down south using Earth's jet stream - the narrow bands of wind roughly five to seven miles above the ground. This also makes the jet stream carrying ...

As dramatic as this sounds, the vortex was in contact with the ground only about a minute and no damage occurred. The tornado was classified as a land spout tornado, which is a brief spin-up of ...