Winter weather is aiming at Delaware again. Where the snow will hit is the biggest question. Here's what we know.

Louisiana is forecasted to have a potential winter storm bringing a surge of cold air late Sunday into early next week.

Temperatures plunged into the teens and single digits in some spots, and the snow-dusted winds are driving the wind chill ...

However, a deep freeze, thanks to the polar vortex dipping down from Siberia, is about to bring even harsher arctic blast to nearly 300 million Americans starting this weekend. Maps show where and ...

A polar vortex is currently hitting the United States, with schools closed in many areas and at least four deaths caused by ...

People living "basically anywhere from the Rockies eastward" will see extremely cold temperatures over the next several days, ...

Most of the U.s. enjoyed warmer air to end the workweek, but the warmup will be brief as a polar vortex will send temperatures tumbling below freezing for most of the nation starting this weekend.

These conditions are all thanks to a familiar sounding occurrence: the polar vortex, a large area of low pressure and cold air that surrounds the Earth's poles. The "vortex" is the ...

The polar vortex is a low-pressure system of cold air that swirls above Earth’s poles. There’s one over the South Pole in ...