A snowstorm blew into the mid-Atlantic states on Tuesday, causing dozens of accidents on icy roads, prompting school closures and stoking worries about possible power outages. The heaviest snowfall — up to 10 inches (25 centimeters) — was expected in parts of Virginia and West Virginia.

ARLINGTON, Va. − Two powerful weather systems were careening across the nation Tuesday, threatening to dump up to a foot of snow in some areas while snarling traffic, clogging roadways, shuttering schools and shutting down government offices.

A fast-moving winter storm packing a dangerous combination of snow, sleet and ice is moving through the Midwest on Saturday afternoon, with up to a foot of snow predicted in parts of the Northeast by Sunday morning.