Figure 1 shows the surface observations at 7:00 am CDT, which shows an outflow boundary moving across southern Manitoba and a stationary front extending east across Manitoba. This stationary front was the focus for thunderstorms in the early morning hours of August 28th, which ultimately led to this tornado.
According to Environment and Climate Change Canada (2018), an F2 tornado touched down near Oak Brae, MB. The track, width, time and date of the tornado was not documented by ECCC. The tornado caused no fatalities, injuries or property damage.
NWS Weather Prediction Center Surface Analysis Archive. (2017). Surface analysis 12Z Wed Aug 28 1991. 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/