A winter weather advisory remains in effect until 10 a.m. New Year’s Day for Washington County and surrounding areas in Western Pennsylvania, according to the National Weather Service. Additional snowfall of 1-3 inches is expected Thursday for total snowfall accumulations of 3-5 inches. A snow squall was expected to track through the region this morning, the Weather Service said, which warned that bridges and overpasses would become slick and hazardous. The speed limit has been reduced from 55 mph to 45 on interstates 79 and 70 in Washington, Greene and Westmoreland counties, according to PennDOT. Crews are treating roads with salt, but motorists are urged to avoid unnecessary travel and use caution.