Strong winds blowing snow off of Mount Whitney, the tallest mountain in the contiguous United States. (Getty Images/Sean ...

The northern lights could be seen from some states in the northern continental United States on Sunday night and early Monday ...

Governor declares state of emergency as powerful ‘Pineapple Express’ atmospheric river triggers flash floods and mudslide ...

Geomagnetic storms caused by a coronal mass ejection from the Sun could cause the aurora borealis to appear brighter and visible from the continental United States.

State officials say the recent deluge highlighted the need for projects to protect communities from floods. The Trump ...

SEATTLE — A Public Health Emergency for Washington state was declared by the U.S. Department of Health and Human Services to ...

California officials and weather forecasters urged holiday travelers to avoid the roads on Christmas Eve and Christmas Day ...

A solar cycle is a roughly 11-year periodic change in the Sun characterized by variations in the number and intensity of sunspots, as well as a flipping of its magnetic poles.

Two storms moving through the Midwest and Northeast are being supercharged by a system on the West Coast. Blizzard warnings are in effect in West Virginia.

An atmospheric river is forecast to drive storms across the state this week, bringing rain, high winds and risk of floods ...

Winter storms threaten holiday travel with snow in the Northeast and heavy rain across California. Newsweek's live blog is closed.

Trump warns it would be “smart” for Venezuelan President Nicolás Maduro to step aside. And severe storms threaten California.