Environment Canada Yellow Watches
Yellow Watch – Severe Thunderstorm
In effect for:
- Guelph – Erin – Southern Wellington County
- Arthur – Mount Forest – Northern Wellington County
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.
What: Wind gusts up to 100 km/h. Quarter sized hail. Rainfall amounts 25 to 50 mm.
When: Beginning this morning into this afternoon.
Additional Comments: A cold front over Michigan is expected to bring a line of thunderstorms as it moves southeast over the area. Driving conditions may be difficult. 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. Secure loose objects. Emergency Management Ontario recommends that you take cover immediately if threatening weather approaches.
Severe thunderstorm watches are issued when conditions are favourable for the development of thunderstorms capable of producing damaging hail, wind or rain.
Please continue to monitor alerts and forecasts issued by Environment Canada.
To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
For more information: ontario.ca/page/be-prepared-emergency.


