The Northern Tornadoes Project at Western University has confirmed weak tornadoes touched down and caused some damage in both Bayfield and Thornbury.
The team received a witness report of a tornado east of Bayfield, and video and photographs show a twister. The report says a shallow tornado debris signature was picked up on radar. The NTP survey team found weak tree damage caused by an EF-0 tornado, which had wind speeds of up to 90 km/hr.
A team also completed drone and grounds surveys of the Clarksburg and Thornbury areas on Sunday, It concluded that structural and tree damage in Thornbury was caused by a tornado that measured a zero on the Enhanced Fujita (EF) scale. The twister travelled just 1.07 kilometres with wind speeds of about 115 km per hour, with a width of about 90 metres.
The same storm spawned a EF-0 downburst in Clarksburg. The team still has more satellite and drone images to review from both storms. The downburst had a top wind speed of 100 km/hr and impacted an area about 2.3 km by 1.6 km.
Environment and Climate Change Canada issued two tornado warnings Saturday night. The first was just after 5 p.m. for northern Huron and southern Bruce County, including from Kincardine to Saugeen Shores. It warned damaging winds, large hail and intense rainfall were possible.
About 8:30 p.m. a second tornado warning was issued for southern Huron County, which was followed by Twitter reports of a potential tornado sighting close to Bayfield.
A severe thunderstorm watch was issued Saturday night for the Thornbury area.