Figure 1 shows the surface observations at 4:00 pm CDT, which shows a low pressure over Lake Manitoba and a warm front extending south across southeastern Manitoba. Northerly flow is observed across Lake Manitoba, which likely triggered lake-breezes south of the lake. Lake-breezes likely triggered thunderstorms south of Lake Manitoba, which ultimately led to this tornado.
According to Environment and Climate Change Canada (2018), an F0 tornado touched down at 3:10 pm CDT near Delta Beach, 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 21Z Mon Jun 22 1992. 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/