Figure 1 shows the surface observations at 7:00 pm CDT, which shows a stationary front across southern Manitoba and a warm front across northern North Dakota with ongoing thunderstorms across southern Manitoba. These ongoing thunderstorms were responsible for this tornado near Lorette.
According to Environment and Climate Change Canada (2018), an F0 tornado touched down at 9:30 pm CDT near Lorette, MB. The track and width 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 00Z Wed Jun 26 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/