Severe Thunderstorm Watch in Effect – June 30, 2026

From Environment Canada

Environment Canada has issued a severe thunderstorm watch for our region this morning into 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.

Hazards:

• Wind gusts up to 110 km/h
• Golf ball-sized hail
• Rainfall amounts in excess of 50 mm
• Risk of tornadoes

Thunderstorms over eastern and central Ontario are expected to keep tracking southeast today bringing strong winds, hail and heavy rain. Local utility outages are possible. Fast-moving and rapidly rising water can sweep vehicles away and damage infrastructure.

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. 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 X using #ONStorm.

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