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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.
When Environment Canada issues a winter weather alert, check your local forecast and postpone non-essential travel. Alerts range from advisories to warnings for snow, ice, and freezing rain, and they tell you what to expect and when.
What types of winter weather alerts are there?
Environment Canada uses three alert levels: a watch means conditions are possible; a warning means severe weather is imminent or occurring; and an advisory covers less severe but still disruptive conditions like blowing snow or freezing drizzle. You can find current weather warnings for your region on this site.
Where do winter alerts happen most in Canada?
Southern Ontario sees frequent winter weather alerts, especially for snow squalls and ice storms. Snow storm forecasts for Ontario often include warnings that affect travel. Environment Canada issues alerts based on regional thresholds, so a warning in northern Ontario may differ from one in the south.
What is the difference between a winter storm warning and a watch?
A watch means a winter storm is possible within 48 hours; a warning means the storm is imminent or already happening. Warnings require immediate action, such as delaying travel, while watches are a heads‑up to stay informed.
How do I get environment canada weather alerts?
You can sign up for alerts through the WeatherCAN app, check the Environment Canada website, or listen to local radio. Many communities also send alerts to mobile phones for severe warnings, including snow storm alerts.
Are winter weather warnings issued for southern Ontario today?
To see if there is a southern Ontario weather warning today, visit the Canada weather hub or the Environment Canada alerts page. Warnings are updated in real time and can change quickly with passing systems.