A mix of sun and cloud is expected tomorrow across Extreme Southwestern Ontario, with wind chills from -10ºC to -12ºC.
The London area can expect lake effect snow throughout the day, with a wind chill near -16ºC.
Communities along the Lake Huron shoreline, including Goderich, can expect heavy lake effect snow. 15 to 35 cm is expected and Environment Canada has issued a Snow Squall Watch for these regions. Wind chill values will hover near -15ºC.
Areas further east such as Toronto and Niagara Falls can expect mainly cloudy skies for the day.