A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of ...

The long-range data shows we may be done with a true Arctic air mass similar to what we experienced in January. But we ...

The unseasonable chill that has swept through the eastern half of the US defies last year's mild winters and the South's ...

With last week's freeze being the second time temperatures dipped below freezing this winter, many are wondering if this ...

As temperatures drop, so does your tire pressure — a small change that can lead to big problems if left unchecked.

Abnormal weather events and severe winter storms could be caused by a disrupted polar vortex. Find out here how the polar ...

It's like "bomb cyclone" or "firenado." It seems like the sort of phenomenon that would be responsible for the ...

Arctic air has brought chilling temperatures as low as 12 degrees to New York City — but are we in a polar vortex? A polar ...

Cold air from the arctic sometimes dips southward across the American plains. What to know about the polar vortex.

The cold temperatures are coming from a not uncommon expansion in the Polar Vortex, which are counter-clockwise rotating air ...

Here is what is and isn't a polar vortex when Colorado receives cold like what is forecast for the holiday weekend.

Polar vortex brings frigid air to US, making Trump's inauguration coldest in 40 years, moved indoors due to cold.