Earth’s magnetic north is not static. Like an anchorless buoy pushed by ocean waves, the magnetic field is constantly on the move as liquid iron sloshes around in the planet’s outer core.

"The level and extensiveness of the frigid air may be tough to match the rest of the winter," forecasters warned.

According to the National Weather Service, a polar vortex will impact most of the country this weekend, here is what you need ...

A polar vortex is slated to sweep most of the continental US bringing winter storm warnings and a hazardous freeze to ...

Another blast of winter weather is expected in parts of the U.S. in the coming days, including bone-chilling wind in the Northern Plains and unusual snow and ice in the Gulf Coast area.

The snow is likely to fall on Sunday from the Appalachians to New England. New York City may see its largest snowfall in ...

Forecasters have released new details on timing and expected snowfall for Sunday's winter storm in Virginia. See the latest.