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.

Thanks to the polar vortex, it feels like one, too. Why is it so cold? The Philadelphia region was hammered Monday by the ...

The National Weather Service in Mount Holly, New Jersey, is calling for 1 to 3 inches of snow throughout the state.

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 ...

A recent study explains how warmer temperatures at the top of the planet destabilize the jet stream and allow colder air to ...

A lobe of the polar vortex, a stormy ring that typically keeps the coldest air locked up near the North Pole, will dip southward into the United States this weekend into next week. Polar air ...

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

Most of the US will enjoy milder temperatures on Thursday, but the warmup will be brief as a polar vortex will send temperatures tumbling below freezing for most of the nation starting this ...