Snow started to fall early this afternoon in counties to the west and north of Pittsburgh, while Allegheny County and areas to the south experienced somewhat warmer temperatures and rainfall.

As the day progresses, though, snow likely will spread across most of the region and cause travel difficulties.

The National Weather Service in Pittsburgh has issued a winter weather advisory from 5 p.m. today through 7 p.m. tomorrow for Allegheny, Washington, Greene, Westmoreland, Fayette and Indiana counties in Pennsylvania. Also in the advisory are Monongalia, Ohio, Marshall, Wetzel and Marion counties in West Virginia.

A winter storm warning for Beaver, Lawrence, Mercer, Venango, Butler, Clarion and Forest counties is in effect until 7 p.m. tomorrow. Other northern counties and most of eastern Ohio also are under a similar winter storm warning, which means heavy snow and/or ice is expected.

Some schools in those areas are dismissing classes early. See information about schools and other community activities on KDKA.com, the Post-Gazette's news partner.

The Mon Wharf still is closed to parking today. While the water has receded, a layer of mud still covers much of the parking area.

Check out the latest conditions and forecast. Commuters also can access the updated traffic conditions.