More than 4 million people across five states were under winter storm alerts on Sunday as heavy lake-effect snow continued to bury the Great Lakes region, prompting emergency declarations and the deployment of National Guard troops to rescue stranded motorists.

This snow system skirts in from the west, bringing accumulating snow for parts of the region tonight. This system likely produces an average of 1-2" for places south of the Ohio River. Since it will be so cold, snow will stick to grass and untreated roads. Watch for slick spots if traveling late Saturday or early Sunday.