Yellow Watch – Severe Thunderstorm (Chapleau – Missinaibi Lake)

Aug 7, 2026 at 21:48

9:11 PM EDT Friday 7 August 2026

Impact Level: Moderate

Forecast Confidence: High

Conditions are favourable for the development of severe thunderstorms that may be capable of producing strong wind gusts, large hail and heavy rain.

Hazards:

• Wind gusts up to 90 km/h.
• Quarter to toonie sized hail.
• Locally heavy rainfall of 30 to 50 mm.

Timing: This evening into the overnight hours.

Additional information: Thunderstorms tracking northeast over Lake Superior will move onshore this evening and continue moving inland tonight. Some storms could become severe with strong winds and large hail.

Local utility outages are possible.

Damage to roofs, fences, branches or soft shelters is possible. When thunder roars, go indoors! Lightning kills and injures Canadians every year.

Emergency Management Ontario recommends that you take cover immediately if threatening weather approaches. Heavy rain can cause flash flooding and significant reductions to visibility.

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Environment Canada

Yellow Alert = Hazardous weather
Orange Alert = Severe weather
Red Alert = Very dangerous and possibly life-threatening weather

For road conditions and other traveller information from the Ministry of Transportation, visit https://www.ontario.ca/511, or call 5-1-1.

Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to [email protected] or tweet reports using #ONStorm.

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