Track everything from current conditions, forecast timing and potential impacts from the winter storm here.

As millions of Americans hunker down for the winter storm, 19 states and Washington, D.C., have declared states of emergency.

In the Northeast, forecasts have called for 12 to 18 inches, though totals will vary locally and may be lower along the immediate coast. Mr. Lamers noted the potential for a “slowly pivoting snow band ...

Severe thunderstorms will impact the East today with damaging wind gusts, large hail and possibly a few tornadoes. On this page, you'll find maps below that will help to track the severe weather.