Environment Canada has issued the warning Simcoe, Dufferin, and Grey counties and York Region as much as 15 centimetres of snow could fall today.

A low pressure system is due to track through Windsor and Toronto this evening and then continue eastward into Quebec.

Snow ahead of the system is moving into the Huron - Perth and Waterloo - Wellington regions Saturday morning and will spread east reaching Ottawa by Saturday afternoon.

The snow will become heavier this afternoon as the low pressure system approaches