National Weather Service forecasters Wednesday set down a Winter Weather Advisory covering almost the entire state, warning of slippery road conditions during the morning and evening commutes. Snowfall is expected to begin between 6 a.m. and 10 a.m. on Thursday, before the precipitation shifts to ice and rain in the afternoon.

Several school districts in central Ohio canceled classes or delayed start times Thursday morning because of icy conditions. Most central Ohio counties are under a Winter Weather Advisory after freezing rain moved through the area,