Forecasters warn that a split polar vortex is set to bring a 'large supply of cold air' to North America in mid-February as a ...

Americans have been warned to brace for more winter storms as Arctic winds are set to dump more ice and snow amid freezing temperatures.

Miles above the Earth, two bands of fast-moving air – the polar jet stream and the stratospheric polar vortex – sometimes tango together to influence weather in the northern hemisphere.

A polar vortex is bringing arctic air into the country next week. Forecast maps show when freezing temperatures will sweep through Texas.

A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the South.