Southern Ontario Prepares for Severe Thunderstorms and Potential Tornadoes

Southwestern Ontario is under a widespread severe thunderstorm risk for June 25, 2026, with a threat extending to Central Ontario. Forecasts indicate potential for large hail, strong wind gusts over 100 km/h, heavy rain, and isolated tornadoes. Areas like Sarnia and London are identified as having conditions favorable for supercell development.