Aldersyde, AB F0 Tornado of August 10, 1980

Okotoks - High River - Claresholm

Figure 1 depicts the surface observations at 7:00 am EST, which shows an area of high pressure dominating Southern Alberta.

Figure 1. Surface analysis at 7:00 am on August 10, 1980 showing mean sea-level pressure (MSLP) contours, surface observations, fronts and pressure centres (NOAA, 2020)

According to Environment and Climate Change Canada (2018), an F0 tornado touched down near Aldersyde, AB. The path, time 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 10, 1980 [PDF]. Retrieved from

Environment and Climate Change Canada Data. (2018). Canadian National Tornado Database: Verified Events (1980-2009) – Public. Retrieved from: