Figure 1 depicts the surface observations at 4:00 pm CDT, which shows a cold front moving across Manitoba. This cold front became the focus for thunderstorms in the evening hours of August 20th, which ultimately led to this tornado.
According to Environment and Climate Change Canada (2018), an F0 tornado touched down at 4:33 pm CDT near St. Andrews, MB. The path and width of the tornado was not documented by ECCC. No property damage was documented for this tornado.
Sources
NWS Weather Prediction Center Surface Analysis Archive. (2017). Surface analysis 21Z Sun Aug 20 2006. 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/
