Figure 1 depicts the surface observations at 7:00 am EST, which shows a low pressure system on the Saskatchewan/Alberta border with a cold front extending south. The interaction with the Rocky Mountains, the low pressure and the front ultimately resulted in thunderstorms across Southern Alberta and this tornado.
According to Environment and Climate Change Canada (2018), an F0 tornado touched down near Grassy Lake, 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. Monday June 2, 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/