On Monday, June 30, a tornado touched down in southern Ontario, just north of London, during the early afternoon as a line of strong thunderstorms swept across the region. A humid and unstable air mass draped over the area created a favourable setup for severe storm development. One of these thunderstorms developed rotation near the community of Lucan, leading to a short-lived tornado.
Environment and Climate Change Canada (ECCC) issued a tornado warning as the storm moved through the area. Multiple reports of a funnel cloud were received, and they coincided with visible damage—especially along Highway 4 near Lucan.
Reported damage included broken branches, downed trees, and crop damage, consistent with the impact of a low-intensity tornado. Weather experts will conduct on-site surveys in the coming days to assign an official rating on the Enhanced Fujita Scale.
This tornado is Ontario’s second confirmed twister of 2025, in a province that typically averages around 18 tornadoes annually. The Canadian tornado season is now in full swing, with activity often peaking between June and August.
The Lucan incident—though brief—underscores how quickly conditions can turn dangerous in southern Ontario, especially on hot and humid early July afternoons.
