Figure 1 depicts the surface observations at 3:00 pm MDT. There were two tornadoes on this day, the other one being:
According to Environment and Climate Change Canada (2018), an F1 tornado touched down at 4:30 pm MDT near Foremost, AB. The path and width of the tornado was not documented by ECCC.
NWS Weather Prediction Center Surface Analysis Archive. (2017). Surface analysis 21Z Tue Jun 17 1986. 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/