Houston has been experiencing below-average temperatures as a polar vortex ushers in cooler conditions across the state.

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

The colder-than-normal temperatures in Houston are part of a larger pattern of Arctic air sweeping through Texas and much of ...

A polar vortex is slated to sweep most of the continental US bringing winter storm warnings and a hazardous freeze to ...

DALLAS - Most of the nation is in good shape on Wednesday and will be warmer on Thursday. The arctic air is coming, but not ...

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

A winter storm that is expected to begin in Texas next week could end up bringing snow and ice to parts of Florida.

Some areas of the U.S. may see temperatures as low as -20 or -30 degrees early next week as arctic air from Siberia rolls in.

As a slug of polar vortex-fueled arctic air overtakes the eastern two-thirds of the U.S. next week, a storm system could ...

A blast of Arctic air is set to cover much of the United States with temperatures below freezing starting on Friday and into ...

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

The polar vortex will soon elongate over North America with a dangerous cold moving into sections of Canada and the U.S.