Windchill temperatures as low as minus 30 degrees are a risk to life, forecasters said.

High above the North Pole, in a slice of atmosphere rarely noticed and even less understood, a transformation is underway. Over the next 10 days, changes in the stratosphere will upend weather ...

Major cities across the Northeast and Midwest are facing temperatures 10-20 degrees below average, according to forecasters.

More dangerously cold air is on the way for much of the U.S. Will Tennessee be impacted? Here's what to know.

Boston has seen just one day so far this month where the average temperature was above the seasonal norm, daring me to ask — are you over the cold yet? Astronomical winter hasn’t even arrived (that ...

This winter’s harsh run is intensifying, with some of the coldest air so far this season plunging into New Hampshire.

STATEN ISLAND, N.Y. — Despite Staten Island Chuck’s recent forecast for an early spring, it appears that New York City residents must brace for yet another wave of Arctic air. Last month, the five ...

The polar vortex is a large area of cold, spinning air that sits near the North Pole and exists year-round. When it weakens or shifts, Arctic air can spill south, increasing the risk of snow and ...

For example, recent observations indicated that fragments of the polar vortex broke apart, sending freezing air towards Central Florida. This shift can lead to unusual weather patterns, even in ...

An Arctic air mass from Canada is bringing brutally cold temperatures to Michigan and the Northeast. Wind chills in Michigan ...