The Weather Channel's Jim Cantore, reporting Saturday morning from the interstate west of St. Louis, noted that many people remained stuck in conditions he called "horrible".
The system was spreading into the Mid-Atlantic region Saturday afternoon.
"So, by that time, most of the snow will have already fallen, but there will still be flurries through the beginning of the game", she said.
Between 3 and 6 inches (7 and 15 centimeters) is expected in the Washington area, including parts of northern and central Maryland, by Sunday.
Sunday brings some clearing, with partly cloudy skies expected by the afternoon and highs in the low to mid 30s. "This is where the highest accumulations of (3 inches or more) are expected". More than a foot of snow fell in some regions of the Midwest.
More than 90 motorists were stranded and four others injured as the snow gripped roads.
Another Missouri driver, Hope Wilson, 32, died after sliding sideways across US-24 and hitting a auto moving in the opposite direction.
In Kansas, three people died Friday in traffic accidents, authorities said Saturday: A 62-year-old man in a vehicle that struck a barrier wall on the Kansas Turnpike, a semi-truck driver whose vehicle collided with another truck and a driver whose vehicle struck an oncoming vehicle and ran into a ditch.
The storm moved into Kansas and Nebraska from the Rockies on Friday, then east into Missouri, Iowa, Illinois and IN, covering roads and making driving unsafe. They included a woman and her 14-year-old stepdaughter whose vehicle slid into the path of a semitrailer in Clinton, about 80 miles southeast of Kansas City, on Friday, the Missouri State Highway Patrol said. Dozens of flights were cancelled or delayed at St. Louis Lambert International Airport over the weekend, while United Airlines offered travel waivers for passengers changing flights across the path of the storm.
In central Missouri, officials said about 12,000 households and businesses were without power in Columbia and the surrounding area at one point. Forecasters expect several inches of snow elsewhere in New Jersey and southeastern Pennsylvania before the storm ends. A winter weather advisory was in effect for Bloomington, Peoria and areas north.