It's going to be a wet and chilly day for half the country.
Environment Canada has issued a swath of weather warnings stretching from Ontario to the Maritimes.
Temperatures dropped fast overnight in Ontario, prompting a flash freeze warning in the south-central part of the province.
Northeastern Ontario could get 15 and 30 centimetres of snow and gusty northerly winds.
Environment Canada is also calling for freezing rain in southern Quebec and snow in the northern parts of the province.
Meanwhile, strong, "potentially damaging" winds and heavy rains are expected in the Maritimes. Rain is forecast for all of New Brunswick with a maximum of 100 millimetres expected in southwestern areas by Tuesday.
A powerful storm pummeling parts of the U.S. has also cancelled or delayed a number of flights out of Pearson International Airport to New York, Chicago and Boston.