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

This index, from NOAA's National Weather Service, attempts to scale the impacts from winter weather, taking into account ...

Forecasters say over half the U.S. population could be affected by snow, ice or bitter cold as a winter storm sweeps across ...

A snow system develops over Cincinnati Tuesday, with heavy showers expected for most of the late morning and early afternoon.