Multiple rounds of snow are expected through Wednesday and dangerously cold temperatures will arriving by the week’s end, ...

Feeling that sudden chill? A triple polar vortex is sweeping across parts of the U.S. Here’s what that means — and where it’s ...

"With rounds of sub-zero temperatures expected in portions of the Plains and Midwest, widespread lows in the teens and 20s ...

Arctic wind patterns create a sort of wall around the pole that prevents frigid air from trickling southward. That wall that ...

Winter hasn't even officially started, but parts of the country are already bracing for what could feel like the deep freeze ...

Polar vortex systems will bring dangerously cold weather to much of the U.S. this month. Learn how to stay safe, and which ...

Once every two years there is a disruption of the polar vortex. So you get very strong warming like tens of degrees Celsius ...

There are early signs that the northeastern United States may be in for several waves of below-average low temperatures this ...

The Pacific Northwest is expected to see up to seven inches of rain this week, as the eastern United States braces for arctic cold.

As we look toward mid-December into January, the door is opening for some potentially significant winter weather.

Something called a sudden stratospheric warming event appears to be on the verge of occurring. Basically, that's when the ...