Thanksgiving week is finally here. If you're flying or driving, here's what you may have to deal with in the nation's weather through Sunday.

It's been a warm autumn, so far. But the polar vortex is forecast to change unusually early, and that could impact your weather in December. Here's why.

Arctic air will plunge southward Thanksgiving week, bringing freezing temperatures and wind chills in the teens for millions of holiday travelers and gatherings.

The waxing crescent moon over the Walton Lighthouse in Santa Cruz, California, was beautiful all on its own. Then, it showed off another celestial phenomenon. See how time-lapse video captures an “Earthshine” and learn what creates the glowing effect.

And a third one was briefly spotted at a beach a few miles south.