First Alert Weather Days are in place this weekend for the likelihood of snow and extreme cold.

The National Weather Service issues a litany of notices before and during inclement weather events. They can be important signals on how to respond.

Tracking snow and dangerously cold temperatures.

Extreme winter weather will blanket the eastern half of the U.S. this weekend with a combination of bitterly cold temperatures, gusty wind and — for some — heavy snow. For the tri-state, cold weather advisories are in place through at least Saturday morning.