The most unusually cold air in the Northern Hemisphere will be over the United States early next week, bringing dangerously frigid conditions.

A blast of Arctic air is set to cover much of the United States with temperatures below freezing starting on Friday and into next week, impacting millions of Americans in nearly all of the contiguous states.

A Siberian chill is on the horizon, threatening to plunge the U.S. into a deep freeze in parts of the east coast

An area stretching from Texas to Tennessee is bracing for the expected arrival of freezing rain and snow, as some other parts of the country that already received an arctic blast this week are prepari

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.

A winter storm that is expected to begin in Texas next week could end up bringing snow and ice to parts of Florida, but the forecast is far from a lock.

The polar vortex of ultra-cold air usually spins around ... store as he loaded his fourth order of the day into his car. Texas Gov. Greg Abbott said Wednesday that the state had deployed several ...

We're tracking an increasing potential for winter weather next week to go along with several mornings that will bring a hard freeze.

A lobe of the polar vortex will arrive in the United States this weekend, bringing the lowest temperatures in years and snow and ice to the East and Deep South.

A rush of Arctic air will overwhelm the weather pattern across North America starting this weekend, plunging Eastern Canada into some deep cold.

As a slug of polar vortex-fueled arctic air overtakes the eastern two-thirds of the U.S. next week, a storm system could bring snow, sleet and freezing rain to places deep in the heart of Texas before it spreads across the Southeast.