Figure 1 depicts the surface observations at 4:00 pm CDT, which shows a low pressure over Pembina. The interaction with the low pressure triggered thunderstorms across Southern Manitoba, which ultimately resulted in this tornado.

According to Environment and Climate Change Canada (2018), an F0 tornado touched down at 3:16 pm CDT over Morris, 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 Mon Jun 9 2008. 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/