Figure 1 depicts the surface observations at 3:00 pm MDT.
According to Environment and Climate Change Canada (2018), an F2 tornado touched down at 6:45 pm MDT near Green Court, AB. The tornado travelled for 30 km, but its width was not documented by ECCC.
NWS Weather Prediction Center Surface Analysis Archive. (2017). Surface analysis 21Z Tue Aug 15 1989. 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/