Figure 1 depicts the surface observations at 7:00 am EST, which shows a trough of low pressure across Western Alberta. This trough likely triggered thunderstorms across Alberta, which ultimately led to this tornado.
According to Environment and Climate Change Canada (2018), an F3 tornado touched down at 6:45 pm MDT near Lloydminster, AB. The path and width of the tornado was not documented by ECCC. No property damage was documented for this tornado.
Sources
NOAA Central Library. (2019). U.S. Daily Weather Maps. Friday July 8, 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/
