The warnings come ahead of a "significant" snow event accompanying a winter storm set to hit the U.S. this weekend.

On Friday, the National Weather Service issued an Ice Storm Warning, which is expected to go into effect on Saturday.

Here's what you should know about the NWS cold-weather warnings and advisories.

Millions of Americans were under coastal weather alerts on Thursday amid strong winds and large waves, among other concerns.

NWS issues Winter Storm Watch for Charlotte, NC with heavy snow, strong winds predicted from Friday into Sunday.