Latest News About Tornado London Ontario

Here’s the latest on tornado activity near London, Ontario.

Summary

• Tornado warnings and severe thunderstorm warnings have circulated in the London area and southwestern Ontario in recent days, with at least one confirmed tornado near Derwent, southeast of London, and ongoing severe weather advisories in parts of the region.[3][9]

Details

• May 19–20, 2026: Environment Canada issued tornado warnings for parts of southwestern Ontario as a line of strong storms tracked eastward, with winds potentially reaching around 110 km/h and large hail. The warnings were upgraded to warnings in some zones and later largely lifted in London as the system moved east, though severe thunderstorm warnings persisted in places.[1][9][3]
• May 20, 2026: Northern Tornadoes Project (Western University) confirmed a tornado touched down southeast of London near Derwent, based on video, radar, and preliminary surveys; a site visit was planned to assess its strength and path length. Utility outages and cleanup followed the storm, with some power restoration progress reported in the region.[3]
• May 19, 2026: Reports indicated a severe thunderstorm system continued to threaten the area, with warnings in place and potential for further severe weather as conditions evolved. Local advisories urged people to take shelter if threatening weather approached.[4][1]
• Other recent events: Historically, London has seen tornado activity associated with fast-moving bow-echo systems and derecho-type outbreaks, including multiple tornadoes in some events and associated widespread damage, though each incident varies by path and intensity.[2][7][8]

What this means for residents

• If you’re in or near London, monitor Environment Canada updates and your local weather app for current warnings and shelter instructions. Tornado warnings require immediate shelter in a basement or interior room away from windows; otherwise, severe thunderstorm warnings imply strong winds, hail, and possible tornado development, so stay indoors during storms.[1][3]
• After a storm passes, beware of hazards such as downed power lines, fallen trees, and structural damage, and follow official guidance for safety and power restoration updates.[1][3]

Would you like a concise timeline of the key events for May 19–20, 2026, or a map-style summary of affected areas near London, Ont.? I can also pull direct updates from Environment Canada or CBC for the latest status.

Citations

• Tornado warning updates and escalation near London, Ont., May 2026.[9][3][1]
• Northern Tornadoes Project confirmation of a tornado near Derwent, southeast of London.[3]
• Context on regional severe weather patterns and past London-area tornado activity.[7][8][2]