December is starting off snowy for much of Southern Ontario.
Snow squall warnings continue Sunday for much of Midwestern Ontario, as a multi-day lake effect snow event gets underway.
Environment Canada said intense snow squalls will move south Sunday and a northwesterly flow off Lake Huron may result in lake effect snow squalls through Tuesday morning.
Some areas could see up to 50 centimetres or more with peak snowfall rates off five to 10 cm per hour.
Meanwhile, in north and east Lambton County a snow squall watch has been issued.
Areas particularly around Grand Bend could see up to 15cm by Tuesday morning.
"There remains uncertainty as to the exact placement of the snow squalls. As is common with snow squalls, snowfall amounts will be highly variable," read the statement by Environment Canada.
In London, Environment Canada has issued a snow squall warning with local snowfall accumulations possibly exceeding 30 cm by Tuesday morning. The highest amounts will remain north of Highways 401 and 402.
Environment Canada warns snow could be heavy at times, resulting in reduced visibility making travel difficult.
Motorists are advised to adjust your driving accordingly.
The weather agency said there could be sudden changes in road conditions and road closures are possible.