Figure 1 depicts the surface observations at 7:00 pm CDT, which shows a low pressure across south-central Manitoba with a stationary front extending south across southeastern Manitoba and Minnesota.

According to Environment and Climate Change Canada (2018), an F0 tornado touched down at 7:30 pm CDT near Eriksdale, MB. The path and width of the tornado was not documented by ECCC. The tornado caused no fatalities, injuries or documented property damage.
Sources
NWS Weather Prediction Center Surface Analysis Archive. (2017). Surface analysis 00Z Tue Jul 13 2004. 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/