Figure 1 depicts the surface observations at 7:00 am EST, which shows a low pressure across Saskatchewan. Southerly flow as a result of the counterclockwise circulation of the low pressure pooling against the Rocky Mountains contributed to enhanced lifting in the lee of the Rockies and triggered thunderstorms, which ultimately led to this tornado.
According to Environment and Climate Change Canada (2018), an F1 tornado touched down near Foremost, AB. The path, time and width of the tornado was not documented by ECCC. No property damage was documented for this tornado.
NOAA Central Library. (2019). U.S. Daily Weather Maps. Wednesday June 11, 1980 [PDF]. Retrieved from https://library.noaa.gov/Collections/Digital-Collections/US-Daily-Weather-Maps
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/