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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.
A weather tornado warning is issued by Environment and Climate Change Canada when a tornado is imminent or occurring, based on radar or spotter confirmation. In Ontario, these warnings demand immediate shelter, as tornadoes can develop with little notice, particularly during severe thunderstorm outbreaks across southern and central regions.
What should you do when a tornado warning is issued for your area?
If a tornado warning is active for your community in Ontario, take cover immediately in a basement or an interior room on the lowest floor, away from windows. Mobile homes and vehicles offer no protection. Listen to local radio or check BuzzLayer’s Canada weather hub for updates. Do not wait for visual confirmation—tornadoes can be hidden by rain or darkness.
How do tornado warnings differ from watches in Ontario?
A tornado watch means conditions are favourable for tornadoes to develop, while a warning means one has been spotted or indicated on radar. Watches cover broad areas for several hours; warnings are smaller, urgent zones lasting 30 to 60 minutes. For current alerts, see Canada Weather Warnings and Weather Warning pages.
What is the difference between a tornado warning and a severe thunderstorm warning?
A tornado warning specifically indicates a tornado is occurring or imminent, while a severe thunderstorm warning means damaging winds, large hail, or heavy rain are expected. Tornado warnings often accompany the most intense thunderstorms.
How can I track tornado warnings in southern Ontario today?
Check Environment Canada’s alerts page or BuzzLayer’s weather hub for southern Ontario weather warning today updates. Mobile weather apps with push notifications are also reliable for tornado warning Ontario today alerts.
Are tornado warnings common in northern Ontario?
Yes, though less frequent than in the south. Northern Ontario weather warnings today can include tornado warnings during summer storms, particularly near Lake Superior and Lake Huron shorelines. Always treat them seriously regardless of location.