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

Michigan is set for several days of frigid temperatures and heavy lake-effect snow as Arctic air continues its slow march ...

Arctic air originates near the polar regions and is among the coldest air masses on Earth. It typically stays locked in ...

What the swirling storms on alien worlds can tell us about the climate on Earth. Damond Benningfield A somewhat alarming new phrase entered the American lexicon when parts of the United States were ...