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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Canada Edition Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Ontario weather alerts are in effect today, with Environment Canada issuing warnings for a mix of severe thunderstorms across southern Ontario and a freezing drizzle advisory for areas near Lake Huron and Georgian Bay, while northern Ontario remains under a snowfall warning.
What weather alerts are active across Ontario today?
A southern Ontario weather warning today covers much of the region between Lake Ontario and Lake Erie, where storm cells are capable of producing damaging wind gusts and heavy downpours. For residents checking an Ontario weather warnings today map, the most intense activity stretches from Windsor to the Niagara Peninsula. Meanwhile, a northern Ontario weather warnings today advisory warns of accumulating snow along the Highway 11 corridor near Timmins and Kapuskasing. The freezing drizzle advisory along the Lake Huron shoreline and into the Muskoka area creates slick road conditions tonight through early morning.
How long will these alerts last and what should you do?
The southern Ontario weather warning today live updates from Environment Canada indicate the thunderstorm threat will diminish after sunset, but the freezing drizzle may persist into late morning. Travelers across the province can check the Canada weather hub for hourly updates. For those in warned zones, avoid unnecessary travel during peak storm times and postpone outdoor activities until the warnings lapse. The freezing drizzle advisory, while less intense than a full storm, still warrants extra caution on untreated surfaces.
What’s the difference between a warning and an advisory?
A warning means severe weather is imminent or occurring. An advisory signals conditions that are less severe but still hazardous, like freezing drizzle. Both require attention but warnings demand immediate action.
How can I get Ontario weather alerts on my phone?
Use the Alert Ready system that sends emergency messages to compatible wireless devices. You can also subscribe to Environment Canada’s email alerts or follow the Canada Weather Warnings page for real-time updates.
Is the freezing drizzle advisory dangerous for driving?
Yes, even a thin layer of ice on roads, especially on untreated bridges and overpasses, can cause loss of traction. Reduce speed and allow extra braking distance if you must drive during an advisory.