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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the BuzzLayer Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
A widespread winter storm warning from Environment Canada covers most of southern and eastern Ontario, including the Greater Toronto Area, for heavy snow and strong winds beginning tonight and persisting into Thursday. Accumulations of 15 to 30 centimetres are forecast, with blowing snow reducing visibility to near zero.
Where is the winter storm warning in effect?
The warning stretches from Windsor through London, the Golden Horseshoe, Ottawa and into eastern counties near the Quebec border. Northern Ontario communities from Sault Ste. Marie to Timmins are also under a separate winter storm watch. For a live view of affected zones, check the Canada winter weather warnings page or the Weather Warning hub for your specific region.
How should Ontario residents prepare?
Limit non-essential travel during the heaviest snow Wednesday evening through Thursday morning. Keep an emergency kit in your vehicle and monitor local forecasts for updates on Canada weather conditions. Wind chill values will drop below minus 20 Celsius, so dress in layers and avoid prolonged exposure.
What is the difference between a winter storm warning and a watch?
A warning means hazardous winter weather is imminent or already occurring. A watch means conditions are possible within 24–48 hours, but residents should prepare for a potential upgrade to a warning.
Will this storm affect flights out of Toronto Pearson?
Yes, heavy snow and low visibility may cause delays and cancellations. Check with your airline. For broader travel impacts, see Canada severe weather flight impact.
Is it safe to drive during the warning?
Road conditions will deteriorate quickly, especially on highways 401, 400 and 403. Environment Canada advises against driving unless absolutely necessary. If you must travel, slow down and turn on full headlights.