YELLOW – Severe Thunderstorm Watch For Brockville & Leeds-Grenville This Afternoon & Evening

Brockville – Environment Canada has issued a YELLOW – Severe Thunderstorm Watch for Brockville & Leeds-Grenville for this afternoon and evening.

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

• 1:25 PM EDT Wednesday 12 August 2026
• Impact Level: Moderate
• Forecast Confidence: High

What:

• Wind gusts near 90 km/h.
• Quarter sized hail.
• Heavy rain.

Scattered thunderstorms have developed and are expected to persist through the day.

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.

Heavy rain can cause flash flooding and significant reductions to visibility.

Strong wind gusts can damage trees, buildings and overturn vehicles.

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 social media using #ONStorm.

For more information: ontario.ca/page/be-prepared-emergency.