Heavy snows left roads and ditches strewn with vehicles Monday afternoon.

The storm, which dropped as many as 6 inches of snow on the northern Wasatch Front, led to a 25-car pileup on Interstate 15, seriously injuring two people and grinding traffic to a halt for two hours during the evening commute.

Vehicles began sliding into one another about 3 p.m. near the Layton Hills Mall, shutting down all lanes of northbound traffic for 20 minutes, said Utah Highway Patrol spokesman Cameron Roden. For the next two hours, traffic trickled through one open lane.

"It caused a pretty big mess," Roden said.

Meanwhile, 180 crashes were reported in Salt Lake and Utah counties, with 35 slide-offs, Roden said.

Snowfall reached 10 inches in Eden, with more than 9 inches at Sundance, 8½ inches at Brighton's crest, 6 inches at Alta, 5 inches at Solitude and 2 inches at The Canyons, according to the National Weather Service.

The storm was expected to continue late Monday with a 60 percent chance of snow today in Salt Lake City, National Weather Service forecasts indicated. Temperatures in the valley are expected to hover around 30 degrees today and tonight.