Follow live updates as a winter storm is expected to bring heavy snowfall, icy roads and cold temperatures across the United ...

The North Pole is surrounded by a massive circular upper-air weather phenomenon in the Arctic called the polar vortex. It is a typical pattern that tends to contain the coldest weather close to the ...

The atmosphere is a complicated place. Warm temperatures in one spot can contribute to brutally cold storms somewhere else.

The storm is forecast to plow east through the weekend, reaching New York, Washington and other major East Coast cities by ...