The National Weather Service has simplified some of its winter weather alerts for Wind Chill and Extreme Cold Warnings.

Advisories from the NWS were in place for New York, Montana, California, Wyoming, Colorado and Alaska early on Friday.

Here are the definitions of the alerts, and what you should know to stay safe when winter weather strikes. Winter Storm ...

Alex Spiotta, from the Isle of Palms, S.C., uses a boogie board to sled across the beach after a winter storm dropped ice and ...

Follow NBC News live updates for the latest coverage of the freezing winter weather affecting large swaths of the U.S., from ...

A massive winter storm is blanketing large swaths of the Southern U.S. in snow and ice, leaving millions eager to track its ...

Go big or phone home. On Wednesday, Walter van Beirendonck, one of the avant-garde fashion designers in the Antwerp Six, ...

To no surprise, our winter storm watch has been upgraded to a winter storm warning for our entire area except for Adair county, who is included in a winter weather advisory. The winter storm ...

The week began with a biting cold snap that hammered much of the U.S., the product of a jet stream that slips out of its ...

As Friday morning, the states under winter storm warnings included Texas ... More Chip Somodevilla/Getty Images While snowfall levels varied state to state, in the Bears Paw, Highwood, Little ...

The downgrade comes hours after the National Weather Service canceled the winter storm warning for Ohio Monday ... Send comments and photos to us using the form embedded in this story.

Do Texans love the snow? Here is what they're saying. A Winter Storm Warning is now in place for Dallas, Fort Worth, and other areas of North Texas from Thursday morning through noon Friday.