Figure 1 depicts the surface observations at 7:00 am EST.
There were two tornadoes on this day:
According to Environment and Climate Change Canada (2018), an F0 tornado touched down at 9:00pm MDT near Stettler, 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. Wednesday August 11, 1982 [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/