This tornado was reported by a CANWARN spotter who observed it touch down at 5:45 pm. Trees were damaged and the siding was torn off of a house. Figure 1 depicts a trough of low pressure extending into far southwestern Ontario at 5:00 pm EDT, which likely contributed to initiating storms and ultimately this F0 tornado.
According to Environment and Climate Change Canada (2018), an F0 tornado touched down at 5:45 pm EDT near McGregor, ON. The track and width of the tornado was not documented by ECCC. The tornado caused no injuries, fatalities or property damage.
Sources
NWS Weather Prediction Center Surface Analysis Archive. (2017). Surface analysis 21Z Thu Sep 6 1990. Retrieved from: https://www.wpc.ncep.noaa.gov/archives/web_pages/sfc/sfc_archive.php
Environment and Climate Change Canada Data. (2018). Canadian National Tornado Database: Verified Events (1980-2009) – Public. Retrieved from: http://donnees.ec.gc.ca/data/weather/products/canadian-national-tornado-database-verified-events-1980-2009-public/