A harsh drop in temperatures is being delivered to the eastern two thirds of the U.S. thanks to a polar vortex dipping down ...

"The coldest conditions (as a whole) will be felt today and on Tuesday," an AccuWeather meteorologist told Newsweek.

A fierce cold snap is in the forecast for the central and eastern U.S. early next week, forecasters warned, with ...

"This has the potential to be the most significant period of cold we have seen so far this fall," one meteorologist told ...

An Arctic front is diving deep into the United States this weekend, sending temperatures plummeting across all 48 contiguous ...

States across the central and eastern U.S. are under extreme heat watches and warnings as the areas face a dangerous heat wave throughout the first half of the week, according to the National Weather ...

The greatest likelihood of sightings stretches from New York in the east to Washington state in the west, but the view line ...

A "strong atmospheric river" could bring more rain and mountain snow to the Northwest, according to forecasters.

Chicago is facing a dangerous lake-effect snow event overnight Sunday into Monday morning. A narrow, but extremely intense band could dump snow at a rate of 3 or more inches per hour - so fast it ...

This new forecast mapping system from the National Weather Service is getting its first lake-effect storm test this weekend.