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

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

All 21 counties in New Jersey have been placed under rare extreme cold warnings from 3 p.m. Saturday to 10 a.m. Sunday.

Light snow is accumulating across parts of Missouri, with temperatures cold enough to cause it to stick, and a second surge of snow is expected to bring the majority of the accumulated snow in the metro,

Updated snow totals for southeastern Virginia: Forecast down