A late winter storm is barreling through the nation's heartland on a path to the mid-Atlantic, targeting the nation's capital and 19 other states.
Experts are saying it could be the biggest snowfall of the winter.
Travel is a nightmare in the upper Midwest. In Colorado, poor visibility and hazardous conditions led to a multiple car pile up on I-70. Several accidents later, officials closed the highway completely.
Slippery Minnesota roads also had drivers losing control. Nineteen states in all, from Montana to Virginia, are under winter watches and warnings.
"This year we have already had four blizzards, and now this winter storm and several others, its been quite a busy winter," meterologist Dave Kellenbenz, with the National Weather Service, said.
In North Dakota, plows cleared roads after more than a foot of snow hit some part so of the state.
"We're dealing with freezing rain to start and then snow on top so they're really icy," Kevin Gorder, a local resident said.
Chicago could see up to 10 inches of snow later Tuesday and Washington, D.C., is bracing for its biggest snowfall in two years.
"It bypassed us in the winter months and here it is March, it's rolling in like a lion so it's better to be prepared," one local resident said.
"I thought it was March and I am getting ready for spring but I gotta be prepared for the storm," another local resident said.
The storm will continue into the Appalachians and mid-Atlantic by Wednesday and Thursday.
Forecaster say it's possible it could dump heavy snow on the Northeast and New England as well.