Winds shifting around out of the northwest will allow the Lake Huron squall to become the dominant feature of the region. This snow squall will meander over this area through Tuesday morning, bringing hefty snowfall totals to parts of the region.

A blast of winter weather delivered a “rude awakening” to parts of Ontario, an Environment Canada meteorologist said, as some communities dug out from nearly a metre of snow on Saturday with more to come.

Snow blowing off lakes Superior and Huron has closed a stretch of the Trans-Canada Highway, knocked out power and buried some communities under nearly a metre of snow.

Shifting winds push the focus of intense snow squalls into southwestern Ontario. Treacherous travel, reduced visibility and power outage risk. Meteorologist Nadine Powell highlights the troublesome travel routes.