Heavy snowfall is expected over Southern Ontario Sunday afternoon and Sunday night.

Environment Canada has issued a special weather statement for our entire region and all of Southern Ontario thanks to a low pressure system that is expected to develop over Oklahoma Saturday and move into the region on Sunday.

The snow will become heavy over Southwestern Ontario Sunday afternoon and over the remaining regions Sunday evening.

Snow will taper off overnight Sunday, but will persist into Monday morning over Eastern Ontario. The snow may change to freezing rain over Eastern Ontario early Monday.

Current indications are that many places will see snowfall amounts of 15 to 20 cm.

On Monday Environment Canada says there will be bitterly cold west to northwest winds that will produce blowing and drifting snow. Snow squalls are forecast to develop off Lake Huron and Georgian Bay Monday and persist into mid-week.

Poor travel conditions will develop over Southern Ontario Sunday.

Keep checking with barrie.ctvnews.ca for the very latest on this developing story.