Snow and ice are already creating tricky driving conditions in western Kansas, as a huge spring storm coats pavement and sets up a wintry weekend in much of the state.

Dozens of school districts canceled classes Friday as blizzard warnings were expanded to include about half of Kansas. Predicted snowfall totals range from six inches to a foot or more, but winds of 40 miles per hour or higher are creating deep drifts and near-zero visibility.

A National Weather Service forecaster in Goodland said whiteout conditions are likely on Interstate 70 and other highways. The Kansas Department of Transportation reports snow-packed and icy conditions on highways in the western third of the state just before daybreak.

At 7:30 a.m. Friday, the service's blizzard warnings were southwest of a line from the northwest corner of the state to just east of Wichita, to the Oklahoma line.