Environment Canada is forecasting 15 to 30 mm of rain by Wednesday morning in the Windsor, Toronto, Hamilton and Kingston areas, among others.
“A Colorado depression is expected to intensify in a spring storm across southern and central Ontario tonight,” says Environment Canada.
Wednesday morning, adds the federal agency, a cold front could bring gusts of 80 to 85 km / h, possibly causing power outages.
Further north, the Gray-Bruce, Parry Sound and Haliburton regions could receive 15 to 30 cm of snow by late Wednesday, according to Environment Canada.
The snow could temporarily change to sleet or freezing rain Tuesday night, overnight or Wednesday morning.
Strong winds could also cause blowing snow and reduce visibility on the roads, especially Wednesday.
“Evaluate the possibility of delaying any non-essential travel until conditions improve. Surfaces such as roads, streets, sidewalks and parking lots can become difficult to navigate because of snow accumulation, “advises Environment Canada.