Snowfall warning for Toronto forecasts 10 to 20 centimetres

Environment Canada issued a yellow snowfall warning for Toronto for Wednesday night, calling for 10 to 20 cm of snow through Thursday afternoon; temperatures and wind chill are expected to fall sharply.

Environment Canada has issued a yellow snowfall warning for Toronto for Wednesday night, forecasting 10 to 20 centimetres of snow beginning in the evening and lasting through Thursday afternoon before tapering into Thursday evening. The weather agency said a developing low-pressure system will bring widespread snowfall across much of southern Ontario and that temperatures will fall sharply, producing cold wind chills during ongoing snowfall. Forecasts noted heavier totals farther from the city, and municipal and transit agencies have activated winter plans in response. Key details: - Environment Canada warns of 10 to 20 cm for Toronto from Wednesday night through Thursday afternoon, with the event tapering into Thursday evening. - A sharp temperature drop is expected, with wind chill values around -22 C overnight and remaining cold on Thursday. - Areas north to Barrie could see up to 20 cm; eastern Ontario and Ottawa up to 25 cm; squalls off Lake Huron could produce up to 40 cm in parts of southwestern Ontario around Sarnia. - The Toronto District School Board and Toronto Catholic District School Board are monitoring conditions and said updates on buses and closures will be provided by 6 a.m.; Toronto Metropolitan University and York University also said they will provide updates by 6 a.m. - The TTC activated its winter weather plan, deploying extra staff, maintenance vehicles, salting and anti-icing trains, and noted some bus stops in hilly areas may be taken out of service; GO Transit said it expects to run regular service but advised customers to check service alerts. - The City of Toronto deployed salters and snowplows and outlined plowing thresholds (sidewalks and bike lanes at 2 cm, expressways at 2.5 cm, roads at 5 cm, residential streets at 8 cm); York Region and Mississauga declared significant weather events and extended winter maintenance hours. Summary: The forecasted snowfall and falling temperatures may affect morning travel and transit across the GTA and surrounding regions. School boards and universities plan to issue operational updates by early Thursday, and transit agencies and municipal crews have activated winter operations and will provide service information as the event develops.