Figure 1 depicts the surface observations at 3:00 pm MDT.
According to Environment and Climate Change Canada (2018), an F0 tornado touched down at 10:00 pm MDT near Florann, AB. The path and width of the tornado was not documented by ECCC.
NWS Weather Prediction Center Surface Analysis Archive. (2017). Surface analysis 21Z Mon Jun 15 1987. 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/