Figure 1 depicts the surface observations at 7:00 am EST, which shows a low pressure in Eastern Washington state. This low pressure likely moved east-northeast and triggered thunderstorms across Alberta, which ultimately led to this tornado.
According to Environment and Climate Change Canada (2018), an F0 tornado touched down near Sylvan Lake, AB. The path, time 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. 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/
