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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Civic Maple Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
A weather warning is an urgent alert issued by Environment and Climate Change Canada when hazardous conditions like heavy snow, freezing rain, or high winds are imminent or occurring. The most common warnings in Canada involve winter storms, extreme heat, and thunderstorms.
What types of weather warnings does Canada use?
Environment Canada issues several specific warnings. A winter storm warning means significant snow, ice, or blowing snow is expected. A rainfall warning triggers when 50 mm or more falls within 24 hours. Heat warnings go out when temperatures reach a certain threshold, often 30°C or higher with high humidity. Wind warnings apply for sustained winds over 70 km/h.
How do I check weather warnings for my area?
You can check current Canada weather warnings on the Environment Canada website or through the WeatherCAN app. For local updates, search for your city—like weather warning toronto, weather warning ottawa, or ontario weather warnings today. Many regions, including southern Ontario, issue southern ontario weather warning today alerts during storm events. For specific storm forecasts, see our Ontario snow storm forecast.
What should I do when a weather warning is issued?
Stay indoors if possible. Monitor Environment Canada updates. Secure outdoor objects. Avoid driving during severe conditions. Keep an emergency kit with water, food, flashlight, and blankets handy.
Are weather warnings the same as watches?
No. A watch means conditions are possible within 24 to 48 hours. A warning means the hazardous weather is imminent or already happening. Warnings require immediate action.
How long does a typical weather warning last?
Most warnings last 6 to 24 hours, depending on the storm system. Heat warnings can persist for several days. Always check the expiry time listed on the alert.