'Roofs can collapse:' Understanding the lake-effect snow headed for Ontario

Communities around southern Ontario are bracing for intense winter weather as a lake-effect squall pattern threatens to deliver large amounts of snow Thursday night and into the weekend. According to the Weather Network and Environment Canada, some areas of the Great Lakes region – such as those on the eastern shores of Lake Ontario, Georgian Bay and Lake Erie – could be buried under 40 to 60 centimetres of snow by Sunday.Climate Barometer newsletter: Sign up to keep your finger on t