Blowing snow has led to some difficult driving conditions in Thunder Bay and parts of northwestern Ontario. 

Environment Canada predicts the city will receive up to 20 centimetres of snow by the time the system, known as an Alberta clipper, leaves the region.

The system has also brought wind gusting up to 60 km/h.

Thunder Bay police report they investigated 15 collisions between 7:30 a.m. and mid-afternoon. Late in the afternoon, OPP closed a section of Highway 61 between Broadway Avenue and Arthur Street after a multi-vehicle collision near the railway overpass.

The Lakehead District School Board has cancelled parent-teacher interviews that were scheduled for today, blaming deteriorating road conditions. This evening's high school sports matches are also cancelled.

Schools will contact parents about a new interview date.

Recreation and child-care programs run by the city have also been cancelled. These include the Grace Remus Child Care Centre evening program, as well as skating programs at the Current River and Grandview arenas. Neighbourhood recreation programs at St. Margaret, C.D. Howe and Edgewater Park schools are also cancelled.