UPDATE: Moon, Robinson Under Winter Storm Warning
Snow-covered roads hold up motorists and spawn crashes. The winter storm warning remains in effect until Thursday.
Snow, sleet or ice will make travel hazardous or impossible today as a winter storm warning remains in effect for the Pittsburgh metro area, according to the National Weather Service in Moon Township.
Parts of Ohio, West Viriginia and Maryland are also under the storm warning.
Reports of icy roads and vehicle accidents were coming across area police scanners steadily Wednesday morning, with traffic back-ups or motor vehicle accidents reported on Market Place and University boulevards, Stoops Ferry Road and "Snake Hill" on Brodhead Road in Moon Township.
The storm warning is in effect until 6 a.m. Thursday. Heavy snowfall began at mid-morning and is expected to fall steadily throughout the day.
Heavy snow—3 to 6 inches from Wheeling, WV, to Pittsburgh to Greensburg and 4 to 8 inches from Zanesville, OH, to Butler to Indiana—is forecast
Sleet and freezing rain may mix in at times, the weather service said.
Pittsburgh International Airport spokeswoman JoAnn Jenny said runways have been cleared of snow at the airport, though dozens of arriving flights have been cancelled.
"At this point our runways are clear," Jenny said. "But we have had a number of cancellations. We always recommend that people check their flights before coming to the airport."
Farther south, 2 to 4 inches of snow are likely where sleet and freezing rain are more likely to mix in.
Up to a 10th of an inch accumulation is possible where freezing rain persists, particularly in the ridges of Fayette and Westmoreland counties, the weather service reports.
Heavy snow is expected through early afternoon; precipitation will taper to very light snow or freezing drizzle this evening, NWS said.
Hazardous travel conditions are expected because of reduced visibility and snow and ice accumulation. Downed trees and power lines are possible where the most freezing rain occurs in the ridges of Fayette and Westmoreland counties.
The National Weather Service warns that visibility could be as low as a quarter mile or less during heavy snow.
Please tell us in the comments section about any travel problems you see in your area.
Updated from first posting, 7 p.m. Dec. 25.