A powerful winter storm is blasting the Northwest with heavy snow and fierce winds, as residents are warned to stay off the roads.

Alerts for cold weather are in effect for nearly half of the U.S. population, running from the northern Plains to the Gulf Coast and the Rockies to the Southeast.

The National Oceanic and Atmospheric Administration's Space Weather Prediction Center prediction map is showing that ... goes down in parts of the northern United States, according to the ...

The National Oceanic and Atmospheric Administration's Space Weather Prediction Center prediction map is showing that ... goes down in parts of the northern United States, according to the ...