Environment Canada has issued a special weather statement saying a low-pressure system will develop over Texas on Christmas Day and then move northeastward, affecting Ontario.
The storm track would place southern Ontario on the cold side of the storm, creating the right conditions for significant snowfall.
"Big-time snowfall accumulations are certainly a possibility," said CBC meteorologist Jay Scotland.
Scotland said the weather system will start in southwestern Ontario early Boxing Day then work its way across the province from southwest to northeast.
"If you do not have the snow tires on the vehicle, do not plan on doing any driving, certainly through the second half of Boxing Day."
However, the storm has yet to develop and so its track may change when it does.
Scotland says easterly winds on Christmas Eve and overnight could pull a few flurries off of the lake toward the Greater Toronto Area.
However, those flurries will likely not be the two centimetres needed for it to be officially called a white Christmas.
They will taper off in the morning and Christmas Day will be sunny.
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