A winter storm is hammering parts of Illinois and Indiana on Sunday, with up to a foot of snow possible in some locations.

Illinois roads were slick and slippery Monday morning as a major winter storm rolled through parts of the Midwest, with snow, freezing drizzle and ice impacting parts of the Chicago-area commute.

Forecasters are warning about a winter storm expected to bring heavy snow and dangerous ice from the Central Plains to the Mid-Atlantic later this week.