An area of low pressure will move across southern Ontario on Wednesday and could result in significant snow across the area.
Snow is expected to begin on Wednesday afternoon. Snow will spread to all of southern Ontario by Wednesday evening. Southwestern Ontario and the Golden Horseshoe could see 10 to 15 cm of snow on Wednesday and portions of eastern and central Ontario will get about 2 to 5 cm.
On Thursday 2 to 5 cm is expected for southwestern and central Ontario as well as the Golden Horseshoe. Areas north of Lake Ontario as well as eastern Ontario will get an additional 5 to 15 cm.
There is the potential that some areas such as Windsor and the Niagara Peninsula could see a transition to rain.
Conditions will improve on Thursday afternoon and the snow ends from south to north.
Southwestern Quebec will see snow being on Wednesday evening. In Southwestern areas, 15 to 25 cm of snow is expected.
Snow will begin overnight Wednesday night over the Lower St Lawrence and spread eastward Thursday morning. 15 to 30 cm of snow is possible in these areas.
In the Eastern Townships, a brief period of rain is possible Thursday morning. There is also a risk of freezing rain during the transition from snow to rain. Over the Gaspé Peninsula and the North Shore, the snow may change to rain Thursday afternoon. There is also a risk of freezing rain during the transition from snow to rain.
Gusty winds are expected.