Forecasters have said parts of the U.S. can expect frigid temperatures in December. A first round has arrived, and more cold ...

Such events distort the polar vortex, which causes Arctic air to descend into the U.S. and causes temperatures to plummet.

Several inches of snow are expected to fall on Dec. 2 in the Northeast and Mid-Atlantic, with freezing rain and iced-over ...

The blast of frigid temperatures follows days of snowy, icy conditions across much of the country. It's bringing the coldest ...

Low temperatures will bottom out into the single digits in many towns Friday morning as wind chills could drop to near 0°.

A blast of Arctic air gripped much of the central and eastern portions of the U.S. on Friday in sub-freezing temperatures ...

A rare weather phenomenon that hasn't occurred since 1968 could soon impact the U.S., plummeting temperatures nationwide.

Afternoon temperatures on Thursday will struggle to climb above 20 degrees in areas where deeper snow remains on the ground.

Temperatures plunged overnight in the New York, New Jersey and Connecticut tri-state area with more cold blasts on their way ...

A late-November cold snap sent temperatures in Minneapolis so low that, for a short time, it was actually colder than Mars, ...

Morning fog possible Sunday: We want to give you a First Alert for the potential to see patchy fog Sunday morning. Visibility ...