Severe thunderstorms are expected to sweep across Southern Ontario and the Greater Toronto Area on Thursday, July 9, 2026, bringing damaging winds, heavy rainfall, and large hail.
A cold front moving through the region will drive the volatile weather system, with storm activity intensifying during the early afternoon.
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Major commuter routes, including Highways 401, 404, and 400, are expected to be impacted. Localized rainfall amounts could reach 30 to 50 mm.
Meteorologists warn that powerful wind gusts pose the primary threat, capable of causing significant damage. Hail ranging from nickel to toonie size is also possible.
A localized tornado risk exists, particularly in areas stretching eastward from Lake Simcoe toward Kingston.
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The widespread severe weather risk encompasses major urban centers such as Windsor, London, Hamilton, Toronto, and Peterborough.
Regions farther north and east, including the Ottawa Valley, face a more isolated risk of severe storms.
High humidity will amplify atmospheric instability, with humidex values projected to climb into the mid-30s before the cold front pushes through.
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Weather tracking data indicates conditions are expected to stabilize later in the evening as daytime heating fades.
