An area of low pressure will intensify over the south-central United States on Sunday night. From there it will impact southern and eastern Ontario, southern Quebec, and Atlantic Canada.
Southern and Eastern Ontario
On Monday mixed precipitation is expected. Areas from Lake Erie northeast through Ottawa and Cornwall will receive mostly rain with 20 to 30 mm possible by Tuesday morning. Windsor northeast through Toronto and toward the Quebec border will likely see a rain-snow mix with 10 to 15 mm of rain during the day and then possibly 2 to 4 cm of snow overnight.
Mostly snow is expected to fall along the eastern shore of Lake Huron northeast through Georgian Bay and Lake Simcoe to the Quebec border. Snowfall amounts of 5 to 10 cm can be expected, there could locally be 10 to 15 cm along the southwestern shore of Georgian Bay. Winds may gust to 90 km/h.
On Tuesday there is the potential for both rain and snow combined with strong winds in southern and eastern Ontario. Some areas of northeastern Ontario could see some freezing rain on Tuesday morning.
Impacts from this low could continue into Wednesday.
Monday afternoon through to Wednesday heavy rainfall is expected with amounts of 20 to 40 millimetres over Southern and Central Quebec and 50 to 80 mm expected over the Gaspé Peninsula and the North Shore. This rain will be accompanied by strong winds.
Areas further north will receive about 10 centimetres of snow, except the Manicouagan region, which could receive about 20 cm.
Rain is expected to invade the area on Monday night. For some areas, the rain will continue through Thursday. Some areas could see significant amounts of rain. In the heaviest rain, 50 to 80 mm is possible.
We will see a messy mix of snow, ice pellets, freezing rain, and rain. Southern sections of Labrador could see 10 mm of rain. There could be 15 to 30 cm of snow along the Trans-Labrador-Highway.
Rain is expected across the province on Wednesday and Thursday. The rain will be sporadic, however, it could be heavy at times. Most areas could see 15 to 30 mm.