Figure 1 depicts the surface observations at 7:00 am EST, which shows a low pressure system in Southern Alberta. The interaction with the Rocky Mountains and this low pressure likely led to thunderstorm development in Southern Alberta, which ultimately led to this tornado.
According to Environment and Climate Change Canada (2018), an F0 tornado touched down at 10:45 am MDT near Berwyn, AB. The path 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. Sunday August 28, 1983 [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/