A severe winter storm brought disruptive snow and sleet to the Mid-Atlantic region of the United States on Monday, disrupting morning commutes and everyday life after punishing the Midwest with blizzards and freezing rain.

Hazardous driving conditions are expected from West Virginia to Delaware, the Weather Prediction Center said, with up to 12 inches of snow expected in some areas, including Washington. More than 350,000 people on the other side of the storm were without power Monday morning from Missouri to Virginia, according to the utility website poweroutage.us.

The storm moved east from the Midwest, where Kansas and Missouri were particularly hard hit. The National Weather Service in Kansas City reported on social media that 11 inches of snow fell at Kansas City International Airport on Sunday, the fourth-largest single-day total in the city’s recorded history. In Topeka, the weather service said late Sunday it was expecting a total of 14.1 inches, the third-most single-day snowfall recorded in the region.

In the Kansas City area, residents huddled indoors between ice- and snow-covered driveways and roads deemed too treacherous to travel. Lightning and booming thunder occurred in some areas, as well as wind gusts of up to 35 miles per hour as the storm moved across the region.

“This is a rare snowstorm for Kansas City,” Gary Lezak, a longtime meteorologist in the area, said Sunday. “It’s incredibly cold.”

The storm caused numerous accidents over the weekend. A fire truck, several tractor-trailers and passenger cars overturned west of Salina, Kansas. Several trucks ended up in deep ditches, icy roads became impassable and pileups occurred on highways throughout the Midwest. The Missouri Highway Patrol reported more than 150 storm-related crashes in the state as of Sunday evening, including at least one fatal crash that killed a 61-year-old man.

The Mid-Atlantic expects snowfall and freezing rain.

On Monday, the storm moved to the Mid-Atlantic, where moderate to heavy snow was forecast. Snow began to fall in the Pittsburgh area, where forecasters predicted that both morning and evening commutes could be disrupted.

The Weather Prediction Center is forecasting severe impacts, including dangerous or impossible driving conditions, across portions of West Virginia, Maryland, Virginia, Washington and Delaware.

Dozens of Amtrak train service along the Northeast Corridor were suspended Monday as the storm hit, and airports across the country faced increasing delays. On Monday morning, the Federal Aviation Administration ordered a ground stop at Chicago’s O’Hare International Airport due to snow and ice. According to FlightAware, the flight tracking website, delays and cancellations increased at Washington’s three airports.

On Monday, 6 to 12 inches of snow was forecast across the mid-Atlantic states, including the Washington metropolitan area. Travelers must expect significant disruptions. Another 2 to 4 inches of snow is expected over portions of the Ohio Valley, where travel disruptions will continue.

Several states in the storm’s area – including Arkansas, Kansas, Kentucky, Missouri, Virginia, West Virginia, Maryland and parts of New Jersey – have declared states of emergency. The declarations are intended to improve states’ responses to the storm in several ways.

Further south, a mix of sleet, freezing rain and significant ice accumulation is expected. Northern Kentucky and parts of southern West Virginia are expected to see more than 0.25 inches of ice, creating treacherous conditions and the risk of power outages.

More than 80,000 customers were without power in Kentucky and 60,000 customers were without power in Indiana early Monday, according to PowerOutage.us, a tracking website.

The cold weather persists.

Snowfall is expected to taper off by Tuesday morning, although light snow may remain in parts of the central Appalachians. Cold, gusty weather is forecast for the following days.

The Weather Prediction Center warned that overnight temperatures in the Central Plains and the Mississippi and Ohio valleys are expected to fall into the single digits to near zero. Daily maximum temperatures are expected to remain below freezing in these areas, while the Mid-Atlantic will be slightly less cold with daytime temperatures near freezing.

“It will be pretty cold for much of the week,” said Bob Oravec of the Weather Prediction Center. From the eastern Rocky Mountains to the East Coast, temperatures will be about 10 to 12 degrees below the seasonal average.

Yan Zhuang And Ali Watkins contributed to reporting.