Persistent weekend storms bring heavy snow and disrupt flights across the U.S.

Heavy snow continues to affect a large swath of the U.S. from the West to the Northeast, canceling and delaying flights at airports across the country.

Wintry weather is affecting the Rockies and the northern Plains. Overnight, periods of heavy snow over the Plains stretched into the Great Lakes region, including major cities like Chicago.

On Sunday, snow over the Great Lakes gradually shifted to the Northeast, bringing showers from Ohio through to New York. Most areas will get 2 to 5 inches, with up to 6 to 8 inches possible in parts of Iowa. In the Northeast, a dusting of up to 3 inches is anticipated. The fast-moving system is forecast to end by early Monday.

University of Delaware students walk to class as a light snow falls in Newark, Del., on Friday.

Damian Giletto / Wilmington