No one was injured when a pickup truck slid onto its side on Little Creek Road, near its intersection with Crab Run, in Lancaster Twp.

Wintery conditions on Monday were a possible contributing factor in multiple crashes in Butler County, and the conditions — plus a winter weather advisory — are expected to persist through this afternoon.

The National Weather Service in Pittsburgh is calling for another 1 to 2 inches of snowfall today, with sustained wind speeds of 8 to 15 mph and gusts as high as 26 mph.

The predictions caused one school district, Seneca Valley, to issue a two-hour delay with modified kindergarten for classes today. But Butler County Emergency Service Director Steve Bicehouse said the conditions shouldn't be too treacherous for motorists.

“As always, people should be careful and drive to the weather conditions,” Bicehouse said. “But I don't see anything from the National Weather Service that's of concern for us.”

Tuesday's predictions mirrored conditions on Monday, when Butler County saw periods of steady snowfall throughout the county.

The conditions produced slick roads on Monday, resulting in a number of crashes around the county. The largest by far was a collection of three wrecks involving at least nine vehicles on Interstate 79 in Cranberry Township.

One crash involving five vehicles and a second involving two happened before noon in the road's northbound lane. Both resulted in minor injuries and no one was hospitalized, authorities said.

A third accident in the road's southbound lane sent a woman and her young son to an area hospital, officials said.

Cranberry Township Fire Department Captain Jeff Gooch identified weather conditions as a possible factor in all of the wrecks.

Earlier Monday morning a one-vehicle crash — a pickup truck that rolled onto its side near the intersection of Little Creek Road and Crab Run in Lancaster Township — resulted in no injuries.

Bicehouse said that although Monday morning saw vehicle accidents, last night was quiet for emergency responders throughout the county.

“It was a quiet night,” he said. “There were no vehicle accidents. They called out road crews, but that's all that happened.”

The NWS says snow is possible, but less likely, through Thursday.

Eagle Staff Writer Amerigo Allegretto contributed to this report.