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.

Snow, high winds and below-average temperatures are sweeping from the Rockies to the Midwest, while an atmospheric river threatens flooding in the Pacific Northwest.

More than 18 million people across the West and Midwest are under winter weather alerts in the United States. This comes as several storms bring heavy snow, wind chills and the threat of flooding, ...

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 ...

First Alert Weather Day is in effect Monday in the mountains as a storm system brings snow to higher elevations.Tonight: Dense Fog and Freezing ConditionsDon’t be surprised by dense fog developing ...

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

It was so shockingly cold that there were short-lived fears of a new ice age. Scientists think human activity contributed to ...

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

Widespread showers and storms are expected to move through Central Florida on Sunday afternoon. The First Warning Weather team is calling for Impact Weather from 2-8 p.m. with a 70% coverage of rain.