Winter Storm Olympia killed at least six people with an icy, snowy blast that knocked out power to thousands and left roads a mess. The large storm hindered travel up and down the East Coastfor a second consecutive day, knocking out power to thousands while being blamed for hundreds of crashes. Schools were closed in many towns as officials attempted to keep students safe and roads clear. (MORE: ) Here's what we know about how Olympia has impacted several regions....

An expansive winter storm will spread snow, ice, and even rain in some northern locations of the East, South and Midwest through the Presidents' Day holiday, and Tuesday. Winter storm watches have been issued by the National Weather Service from parts of northern Georgia into the Appalachians and mid-Atlantic states, ahead of the storm. More than 38 million people over a broad area from the Plains into the Midwest and East Coast were under a winter storm warning, watch or...

Meteorologist Ari Sarsalari explains what a polar vortex is. ...