TOLEDO, Ohio (AP) -- A wintry storm has caused hazardous conditions in northern Ohio, and bad weather resulted in numerous cancellations from school basketball games to holiday events across the state.

The National Weather Service said snowfall intensifying Saturday would drop 3 to 5 inches across much of the state's north, adding to the 3-4 inches already on the ground in many areas. Forecasters warned of slick roads and reduced visibility for drivers.

The Toledo Zoo closed early for the day, and the annual Mt. Adams Reindog Parade featuring costumed canines was postponed in Cincinnati. A scheduled appearance in Rocky River by celebrity chef Rachael Ray also had to be canceled because of bad travel conditions in the East.

Troopers across the state responded to multiple slide-off accidents and vehicle collisions that snarled traffic.