Mayerthorpe, AB F1 Tornado of August 13, 1989

Figure 1 depicts the surface observations at 3:00 pm MDT.

**Figure 1.** Surface analysis at 21Z on August 13, 1989 showing mean sea-level pressure (MSLP) contours, surface observations, fronts and pressure centres (WPC, 2017)

According to Environment and Climate Change Canada (2018), an F1 tornado touched down at 5:00 pm MDT near Mayerthorpe, AB. The path and width of the tornado was not documented by ECCC.

Sources

NWS Weather Prediction Center Surface Analysis Archive. (2017). Surface analysis 21Z Sun Aug 13 1989. Retrieved from: https://www.wpc.ncep.noaa.gov/archives/web_pages/sfc/sfc_archive.php

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/

Sources

Through the Eyes of Our Chasers