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

An "Arctic anticyclone" slumping over the United States will spawn a frenzy of snow-laden winter storms. More than 200 ...

According to the NWS, the Arctic polar vortex is a powerful band of west-to-east winds that develops in the stratosphere, about 10 to 30 miles above the North Pole, during the winter season. It is ...

The cold air will be somewhat limited, but enough arctic air will wrap around the system that a snowstorm could break out in ...

The coldest air of the season will descend across the U.S. this weekend and early next week, bringing subzero wind chills with it.

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

"Multiple waves of arctic air continue to gather over northern Canada with eyes for the central and eastern United States in the days ... the National Weather Service warned, before roaring ...

A procession of winter storms is forecast to bring snow, sleet, ice and potentially flood-inducing rain to sprawling bands of the U.S. this week.

Three people have died after a historic snow storm unleashed across approximately 1500 miles of the southern US Tuesday, blanketing large parts of Texas, Louisiana and Florida. The rare storm ...