Tornado warning lifted, severe thunderstorm watch throughout southern Ontario

Storm clouds in West Lorne, looking toward Glencoe Ont. June 25, 2026 (Source: Rachel Guay Schurrman)

A red tornado warning that was issued for the Glencoe area has since been lifted.

Environment Canada meteorologists were tracking a large thunderstorm system that they said had the potential to produce a tornado.

The alert was initially issued for the Glencoe area just before 6 p.m., but it quickly moved eastward toward John E. Pearce Provincial Park before proceeding to Moraviantown and Thamesville. The warning also blanketed Chatham-Kent for a period of time.

The warning was one that Environment Canada called a ‘very dangerous and potentially life-threatening situation.’

Currently, a tornado has not been confirmed. The warning was lifted just before 8 p.m.

Here’s what you can expect in the coming days

A severe thunderstorm watch remains in effect for much of southern Ontario. Rainfall and other extreme weather is expected to persist into the evening.

A large amount of rain is expected to accompany those thunderstorms, with some locations throughout the region including London expecting in excess of 20 millimeters of rain.

Saturday will be cloudy with sunny breaks, but the real turn comes on Sunday, when temperatures are expected to shoot up to around 30 degrees.

If you’re looking to cool off, you can do so at various swimming pools across the city starting this weekend.

All outdoor pools will open for the season on Saturday.

More information about pool hours and programs is available on the city’s website.

All wading pools will also open on Saturday, while splash pads have been operating since May.

- with files from CTV London’s Matt Thompson

London area forecast

Thursday: Showers with risk of a thunderstorm. Wind south 20 km/h gusting to 40. High 23. Humidex 28. UV index 7 or high.

Thursday night: Mainly cloudy. 70 per cent chance of showers this evening with risk of a thunderstorm. Wind west 20 km/h becoming light near midnight. Low 13.

Friday: Cloudy. Wind becoming north 20 km/h gusting to 40 near noon. High 22. Humidex 26. UV index 6 or high.

Saturday: A mix of sun and cloud. High 25.

Sunday: Sunny. High 27.

Monday: A mix of sun and cloud with 30 per cent chance of showers. High 30.