Figure 1 depicts the surface observations at 7:00 pm CDT, which shows a stationary front extending across Saskatchewan and a cold front moving south across the Midwest. The interaction with the stationary front and terrain interactions from the Manitoba Escarpment likely contributed to storms in western Manitoba in the afternoon hours of May 10th, which ultimately led to two tornadoes.
According to Environment and Climate Change Canada (2018), an F0 tornado touched down at 7:59 pm CDT near Winkler, MB. The path 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 Fri May 11 2001. 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/