A winter storm that slammed some parts of the Midwest and that officials say contributed to the deaths of at least nine people moved east on Sunday, causing travel disruptions and power failures.

Much of the snow was winding down in the Midwest, Dan Pydynowski, a meteorologist with AccuWeather, said. “There is still some light lingering snow around St. Louis and parts of central Illinois,” he said, adding that it was expected to stop by late Sunday evening.

But as the Midwest dug itself out, the storm continued east on Sunday. The system delivered snow to Baltimore; Washington, D.C.; Delaware; parts of New Jersey; and the mountains in Virginia. Mr. Pydynowski said the snow would continue across southern New Jersey until very early Monday morning before ending.

As of early Sunday afternoon, O’Hare International Airport in Chicago reported 35 delayed flights and four cancellations, according to the flight tracking website FlightAware.com. But the airport showed signs on Monday morning of returning to normal operations: Only one flight had been canceled so far, according to the site.