PITTSBURGH — (WPXI)- Soaking rain changed to snow Thursday night with icy roads making travel difficult on Christmas Eve. Roads became snow-covered and slick by the evening on Thursday. A Winter Weather Advisory will be in effect until 1 p.m. Friday for our entire area. Road conditions worsened through the evening as the snow fell. Travel restrictions were implemented by PennDOT for Interstates 70 and 79 in the area. Periods of moderate snow are still possible. Several inches will accumulate from this storm. The National Weather Service is predicting widespread accumulations of 4 to 6 inches.