The west half of the country, including the Midwest, will start to warm up. But that won't be the case for the East Coast.

To understand what Americans are experiencing with this winter blast, we need to look more than 20 miles above the surface of ...

A collapse in the polar vortex is letting Artic air come here. What that means, and why it happens.

The west half of the country, including the Midwest, will start to warm up. But that won't be the case for the East Coast. Here's the forecast.

A severe winter storm that brought freezing rain, sleet and snow to a large part of the U.S. was intensified by the polar ...

Rising Arctic temperatures and melting sea ice could be causing cold air to flow into the Northern Hemisphere. But not all ...

Much of the nation east of the Rocky Mountains is hunkered down for what could be the worst winter storm of the season.

Forecasters reckon parts of North Staffordshire could see snow within days as the chances of the UK being hit by a 'polar ...