A winter storm that rolled over southern Ontario Sunday and continued to dump snow overnight is creating difficult driving conditions for commuters.

Schools within the Toronto District School Board and Toronto Catholic District School Boards remain open, but bus service has been cancelled.

Similarly, Durham District School Board and Durham Catholic District School Board schools are open, but all transportation has been cancelled.

All schools in the York Region District School Board, with the exception of Bill Crothers Secondary School, are closed for a PD day. Bill Crothers remains open, but bus service has been cancelled.

The following school boards have cancelled all transportation services and closed all schools and offices for Monday:

Halton District School Board

Halton Catholic District School Board

Dufferin-Peel Catholic District School Board

Peel District School Board

Hamilton-Wentworth District School Board

Hamilton-Wentworth Catholic District School Board

Niagara District School Board

Niagara Catholic District School Board

Grand-Erie District School Board

Holy Trinity School in Richmond Hill

The Mississauga Children Montessori School

Reach Out Centre for Kids offices

Grandview Children's Centre

Crestwood School (Crestwood Preparatory College will remain open)

McMaster University, University of Toronto Mississauga, Brock University, Humber College, Mohawk College, Sheridan College, Trillium College and Centennial College have also cancelled classes for the day.