Charlie Riedel / AP
Pedestrians are shrouded in heavy snow as they cross a downtown street on Saturday in Kansas City, Mo.
Midwesterners saw no signs of spring on Sunday as heavy snow blanketed a large swath of the country that stretched from Missouri to Pennsylvania.
The storm doused Colorado and northwest Kansas on Saturday, leaving 10 to 15 inches of snow in some areas, according to the National Weather Service. Now the system is moving east and will make its way through the mid-Mississippi Valley, the Ohio Valley and the Appalachians, where it is expected to leave six to 10 inches of snow in its wake.
By 3 p.m. on Sunday, St. Louis had 8 inches of snow, causing travel headaches both on the ground and in the air. More than 70 flights into and out of St. Louis International Airport were canceled, according to FlightAware.com. Airports in Kansas City and Chicago also canceled dozens of flights for reasons related to the storm.
Indianapolis, Columbus, Ohio and Pittsburgh are all expected to be hit with heavy snow accumulation by the end of Sunday, National Weather Service meteorologist Ariel Cohen told Reuters.
New Jersey and New England may also be hit by the storm late Monday or early Tuesday. Washington, D.C. could be in the early spring storm's path, but Cohen said temperatures were too warm for any significant accumulation. If snow flurries drop, it will come at the start of Washington’s annual Cherry Blossom Festival.
The weather system canceled 100 flight in and out of Denver International Airport just one day prior, and closed Interstate 70 in both directions east of Denver to the Kansas state line.
But the snow has not affected the NCAA men's basketball championships, part of which is being played in Kansas City this weekend. North Carolina coach Roy Williams said the wintery weather was "no distraction."
The Associated Press and Reuters contributed to this report
A storm system blanketed the Midwest in snow, while thunderstorms and wind gusts slammed the South, NBC's Janel Klein reports.