Snow, freezing rain and icy roads Tuesday made driving dangerous for motorists in Butler County.

Numerous collisions and rollovers were reported throughout the day and throughout the county.

And in southeast Armstrong County, a crash proved fatal for a driver whose car collided with a sport utility vehicle on Route 210 in Plum Creek Township near the Keystone Lake Dam.

State police said Mark Blystone, 23, of Spring Church, Armstrong County, died when he lost control of his Dodge Neon traveling north on the road about 6 p.m. Tuesday, veered into the southbound lane and slammed head-on with a Chevrolet Tahoe.

Blystone, a student at Butler County Community College, was killed instantly in the crash, authorities said. Armstrong County Coroner Robert Bower pronounced Blystone dead at the scene of massive chest injuries at 6:50 p.m.

Bower said the crash "appears weather related." Blystone's death was ruled accidental.

Sheila Rankin, 36, of Creekside, Indiana County, who was driving the Tahoe, was taken with serious injuries to Indiana Hospital. Her condition was not known this morning.

Meanwhile, an elderly woman was injured when her car overturned on Glade Mill Road in Middlesex Township.

Ines Natale, 87, of Valencia was driving east when, at 10:24 a.m., her car hit an ice patch, skidded off the road, traveled up an embankment and rolled onto the driver's side, said Middlesex Township police Chief Ed Brooks.

Firefighters were called and cut through the car's roof to free Natale from the wreckage. She was treated for minor injuries at Butler Memorial Hospital.

The predicted winter storm that swept through the county kept state police and Butler Communications Center dispatchers busy most of the day and night.

Troopers at the Butler barracks handled about 40 accident calls. Eleven crashes with injuries were reported between 7 a.m. and 5:15 p.m., according to the communications center.

Among the crashes were two involving school buses.

Dispatchers reported an empty school bus crashed about 7 a.m. on Kelly Road in Muddy Creek Township. A police report and information about possible injuries were not available this morning.

No injuries were reported when a small bus struck an embankment at about 3:50 p.m. on Dinnerbell Road in Jefferson Township.

In Slippery Rock, the most serious accident Tuesday involved a car and a house at South Water and North Main streets. Luckily, no one was seriously hurt in the 7:30 a.m. crash, said Chief Fred Emigh of the borough police.

Several crashes, mostly minor, were reported on Interstate 79 in Butler County.

North of the county, Interstate 80 also proved treacherous for drivers.

The Clintonville Volunteer Fire Department on Tuesday assisted police on at least seven crash calls, said fire Chief DeWayne Moore. No one was seriously hurt in the accidents.

Across Mercer County, state police responded to about 60 crashes Tuesday.

About 6 inches of snow mixed with sleet and freezing rain were dumped in the county and the northern edge of Butler County, Moore said.

Farther south into Butler County, total snowfall, diminished by the freezing rain, was not as great.

While 6 inches of precipitation fell, snow accumulation was recorded at 3.4 inches at the Butler Area Sewer Authority plant.

The storm was enough to force most Butler County schools, public and private, to close for the day. Classes at the Butler County Community College were cancelled later in the afternoon.

The National Weather Service in Pittsburgh reported the worst is over for now.

The forecast for tonight calls for a 50 percent chance of snow showers, with minimal accumulation, possibly an inch. Temperatures are expected to dip into the lower 20s.

A mix of rain and snow is predicted Thursday with highs in the upper 30s. Snow showers will end by Friday afternoon with highs reaching into the lower 40s, the weather service said.

Rain and temperatures nearing 50 degrees are forecast for Saturday, which marks the start of spring.

Staff writers Kris Miller and Karen Baier contributed to this report.